islandflow/.agents/skills/impeccable/scripts/detector/rules/checks.mjs
dirtydishes f237916291
Some checks are pending
CI / Validate (push) Waiting to run
Install Impeccable skill for Codex
2026-05-29 03:59:27 -04:00

2316 lines
98 KiB
JavaScript
Raw Permalink Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

import {
BORDER_SAFE_TAGS,
GENERIC_FONTS,
KNOWN_SERIF_FONTS,
OVERUSED_FONTS,
SAFE_TAGS,
WCAG_LARGE_BOLD_TEXT_PX,
WCAG_LARGE_TEXT_PX,
isBrandFontOnOwnDomain,
} from '../shared/constants.mjs';
import {
colorToHex,
contrastRatio,
getHue,
hasChroma,
isNeutralColor,
parseGradientColors,
parseRgb,
relativeLuminance,
} from '../shared/color.mjs';
const DETECTOR_IS_BROWSER = typeof window !== 'undefined';
// ─── Section 3: Pure Detection ──────────────────────────────────────────────
function checkBorders(tag, widths, colors, radius) {
if (BORDER_SAFE_TAGS.has(tag)) return [];
const findings = [];
const sides = ['Top', 'Right', 'Bottom', 'Left'];
for (const side of sides) {
const w = widths[side];
if (w < 1 || isNeutralColor(colors[side])) continue;
const otherSides = sides.filter(s => s !== side);
const maxOther = Math.max(...otherSides.map(s => widths[s]));
if (!(w >= 2 && (maxOther <= 1 || w >= maxOther * 2))) continue;
const sn = side.toLowerCase();
const isSide = side === 'Left' || side === 'Right';
if (isSide) {
if (radius > 0) findings.push({ id: 'side-tab', snippet: `border-${sn}: ${w}px + border-radius: ${radius}px` });
else if (w >= 3) findings.push({ id: 'side-tab', snippet: `border-${sn}: ${w}px` });
} else {
if (radius > 0 && w >= 2) findings.push({ id: 'border-accent-on-rounded', snippet: `border-${sn}: ${w}px + border-radius: ${radius}px` });
}
}
return findings;
}
// Returns true if the given text is composed entirely of emoji characters
// (plus whitespace / variation selectors). Emojis render as multicolor glyphs
// regardless of CSS `color`, so contrast checks against the element's text
// color are meaningless for these nodes.
const EMOJI_CHAR_RE = /[\u{1F1E6}-\u{1F1FF}\u{1F300}-\u{1F9FF}\u{1FA00}-\u{1FAFF}\u{2600}-\u{27BF}\u{2300}-\u{23FF}\u{FE0F}\u{200D}\u{1F3FB}-\u{1F3FF}]/u;
const EMOJI_CHARS_GLOBAL = /[\u{1F1E6}-\u{1F1FF}\u{1F300}-\u{1F9FF}\u{1FA00}-\u{1FAFF}\u{2600}-\u{27BF}\u{2300}-\u{23FF}\u{FE0F}\u{200D}\u{1F3FB}-\u{1F3FF}]/gu;
function isEmojiOnlyText(text) {
if (!text) return false;
if (!EMOJI_CHAR_RE.test(text)) return false;
return text.replace(EMOJI_CHARS_GLOBAL, '').trim() === '';
}
function checkColors(opts) {
const { tag, textColor, bgColor, effectiveBg, effectiveBgStops, fontSize, fontWeight, hasDirectText, isEmojiOnly, bgClip, bgImage, classList } = opts;
if (SAFE_TAGS.has(tag)) {
// Exception for <a> and <button> elements styled as buttons. SAFE_TAGS
// exists to suppress contrast noise on inline links and unstyled controls,
// where the element has no own background and the contrast against the
// ancestor surface is already the intended visual. When the element has
// its own opaque background and direct text, it is a styled button — and
// contrast on its own surface is a real, frequent bug worth flagging.
const isStyledButton = (tag === 'a' || tag === 'button')
&& hasDirectText
&& bgColor && bgColor.a > 0.5;
if (!isStyledButton) return [];
}
const findings = [];
if (hasDirectText && textColor && !isEmojiOnly) {
// Run background-dependent checks against either a solid bg or, if the
// ancestor is a gradient, against every gradient stop (use the worst case).
const bgs = effectiveBg ? [effectiveBg] : (effectiveBgStops && effectiveBgStops.length ? effectiveBgStops : null);
if (bgs) {
// Gray on colored background — flag if every stop is chromatic
const textLum = relativeLuminance(textColor);
const isGray = !hasChroma(textColor, 20) && textLum > 0.05 && textLum < 0.85;
if (isGray && bgs.every(b => hasChroma(b, 40))) {
const bgLabel = effectiveBg ? colorToHex(effectiveBg) : `gradient(${bgs.map(colorToHex).join(', ')})`;
findings.push({ id: 'gray-on-color', snippet: `text ${colorToHex(textColor)} on bg ${bgLabel}` });
}
// Low contrast (WCAG AA) — worst case across all bg stops
const ratios = bgs.map(b => contrastRatio(textColor, b));
let worstIdx = 0;
for (let i = 1; i < ratios.length; i++) if (ratios[i] < ratios[worstIdx]) worstIdx = i;
const ratio = ratios[worstIdx];
const isLargeText = fontSize >= WCAG_LARGE_TEXT_PX || (fontSize >= WCAG_LARGE_BOLD_TEXT_PX && fontWeight >= 700);
const threshold = isLargeText ? 3.0 : 4.5;
if (ratio < threshold) {
// Skip the false-positive class where text has alpha < 1 AND we
// couldn't find an opaque ancestor (effectiveBg is null, we're
// comparing against gradient-stop fallback). In jsdom mode the
// detector can't resolve `var(--X)` color tokens, so a dark
// section sitting between the text and the body's decorative
// gradient is invisible to us — we end up measuring contrast
// against the body's paper-grain noise instead of the real
// local bg. Real low-contrast bugs use alpha=1 and have a
// resolvable opaque ancestor; semi-transparent Tailwind tokens
// like `text-paper/60` on `bg-ink` sections are the FP pattern.
const isAlphaFallbackFP = !DETECTOR_IS_BROWSER && !effectiveBg && (textColor.a != null && textColor.a < 1);
if (!isAlphaFallbackFP) {
findings.push({ id: 'low-contrast', snippet: `${ratio.toFixed(1)}:1 (need ${threshold}:1) — text ${colorToHex(textColor)} on ${colorToHex(bgs[worstIdx])}` });
}
}
}
// AI palette: purple/violet on headings
if (hasChroma(textColor, 50)) {
const hue = getHue(textColor);
if (hue >= 260 && hue <= 310 && (['h1', 'h2', 'h3'].includes(tag) || fontSize >= 20)) {
findings.push({ id: 'ai-color-palette', snippet: `Purple/violet text (${colorToHex(textColor)}) on heading` });
}
}
}
// Gradient text
if (bgClip === 'text' && bgImage && bgImage.includes('gradient')) {
findings.push({ id: 'gradient-text', snippet: 'background-clip: text + gradient' });
}
// Tailwind class checks
if (classList) {
const classStr = typeof classList === 'string' ? classList : Array.from(classList).join(' ');
const grayMatch = classStr.match(/\btext-(?:gray|slate|zinc|neutral|stone)-\d+\b/);
const colorBgMatch = classStr.match(/\bbg-(?:red|orange|amber|yellow|lime|green|emerald|teal|cyan|sky|blue|indigo|violet|purple|fuchsia|pink|rose)-\d+\b/);
if (grayMatch && colorBgMatch) {
findings.push({ id: 'gray-on-color', snippet: `${grayMatch[0]} on ${colorBgMatch[0]}` });
}
if (/\bbg-clip-text\b/.test(classStr) && /\bbg-gradient-to-/.test(classStr)) {
findings.push({ id: 'gradient-text', snippet: 'bg-clip-text + bg-gradient (Tailwind)' });
}
const purpleText = classStr.match(/\btext-(?:purple|violet|indigo)-\d+\b/);
if (purpleText && (['h1', 'h2', 'h3'].includes(tag) || /\btext-(?:[2-9]xl)\b/.test(classStr))) {
findings.push({ id: 'ai-color-palette', snippet: `${purpleText[0]} on heading` });
}
if (/\bfrom-(?:purple|violet|indigo)-\d+\b/.test(classStr) && /\bto-(?:purple|violet|indigo|blue|cyan|pink|fuchsia)-\d+\b/.test(classStr)) {
findings.push({ id: 'ai-color-palette', snippet: 'Purple/violet gradient (Tailwind)' });
}
}
return findings;
}
function isCardLikeFromProps(hasShadow, hasBorder, hasRadius, hasBg) {
if (!hasShadow && !hasBorder) return false;
return hasRadius || hasBg;
}
const HEADING_TAGS = new Set(['h1', 'h2', 'h3', 'h4', 'h5', 'h6']);
// Pure check: given a heading and metrics about its previousElementSibling,
// decide if the sibling is the canonical "icon-tile-stacked-above-heading" shape.
//
// Triggers when ALL of the following hold for the sibling:
// • size 32128px on both axes (not too small, not a hero image)
// • aspect ratio 0.71.4 (squarish — excludes wide thumbnails / pill badges)
// • has a non-transparent background-color, background-image, OR a visible border
// (covers solid colors, white-with-border, gradients — anything that visually
// defines a tile)
// • border-radius < width/2 (excludes round avatars; rounded squares pass)
// • contains an <svg> or icon-class <i> element that's smaller than the tile
// • the tile sits above the heading (its bottom is above the heading's top)
function checkIconTile(opts) {
const { headingTag, headingText, headingTop,
siblingTag, siblingWidth, siblingHeight, siblingBottom,
siblingBgColor, siblingBgImage, siblingBorderWidth, siblingBorderRadius,
hasIconChild, iconChildWidth } = opts;
if (!HEADING_TAGS.has(headingTag)) return [];
if (!siblingTag) return [];
// Don't recurse into nested headings (e.g. h2 above h3 in a section header)
if (HEADING_TAGS.has(siblingTag)) return [];
// Size window: 32128px on each axis
if (!(siblingWidth >= 32 && siblingWidth <= 128)) return [];
if (!(siblingHeight >= 32 && siblingHeight <= 128)) return [];
// Squarish aspect ratio
const ratio = siblingWidth / siblingHeight;
if (ratio < 0.7 || ratio > 1.4) return [];
// Must have something that visually defines the tile
const bgVisible = (siblingBgColor && siblingBgColor.a > 0.1)
|| (siblingBgImage && siblingBgImage !== 'none' && siblingBgImage !== '');
const borderVisible = siblingBorderWidth > 0;
if (!bgVisible && !borderVisible) return [];
// Exclude circles (avatars). Rounded squares pass.
if (siblingBorderRadius >= siblingWidth / 2) return [];
// Must contain an icon element smaller than the tile
if (!hasIconChild) return [];
if (iconChildWidth && iconChildWidth >= siblingWidth * 0.95) return [];
// Vertical stacking: tile must end above where the heading starts.
// (Allow the check to skip when both top/bottom are 0 — jsdom layout case.)
if (headingTop && siblingBottom && siblingBottom > headingTop + 4) return [];
const text = (headingText || '').trim().slice(0, 60);
return [{
id: 'icon-tile-stack',
snippet: `${Math.round(siblingWidth)}x${Math.round(siblingHeight)}px icon tile above ${headingTag} "${text}"`,
}];
}
// Resolve the primary (non-generic) face from a font-family string and return
// whether the resolved primary is serif. Two paths:
// 1. Primary face is in KNOWN_SERIF_FONTS → serif.
// 2. Primary face is unknown but the stack ends in the generic `serif`
// token → treat as serif. Authors who declare `font-family: 'X', serif`
// almost always have a serif primary; a sans declared with a serif
// fallback is a code smell, not the common case.
// Returns { primary, isSerif } so the snippet can name the face.
function resolveSerif(fontFamily) {
if (!fontFamily) return { primary: null, isSerif: false };
const tokens = fontFamily.split(',').map(f => f.trim().replace(/^['"]|['"]$/g, '').toLowerCase());
const primary = tokens.find(f => f && !GENERIC_FONTS.has(f)) || null;
if (!primary) return { primary: null, isSerif: false };
if (KNOWN_SERIF_FONTS.has(primary)) return { primary, isSerif: true };
if (tokens.includes('serif')) return { primary, isSerif: true };
return { primary, isSerif: false };
}
function checkItalicSerif(opts) {
const { tag, fontStyle, fontFamily, fontSize, headingText } = opts;
if (fontStyle !== 'italic') return [];
// Anchor the rule on hero-scale text. h1 is the canonical hero element;
// h2 ≥ 48px catches the cases where the design demotes the visual hero
// to an h2 but keeps the size.
if (tag !== 'h1' && !(tag === 'h2' && fontSize >= 48)) return [];
if (fontSize < 48) return [];
const { primary, isSerif } = resolveSerif(fontFamily);
if (!isSerif) return [];
const text = (headingText || '').trim().slice(0, 60);
return [{
id: 'italic-serif-display',
snippet: `italic serif ${tag} (${primary || 'serif'}) at ${Math.round(fontSize)}px "${text}"`,
}];
}
// Color saturation check. Returns true when the color has visible
// chroma — i.e., it's an "accent color" rather than near-neutral.
// Handles rgb()/rgba(), #hex, oklch(), and hsl(). var() refs are
// expected to be pre-resolved by the caller.
function isAccentColor(cssColor) {
if (!cssColor) return false;
const s = String(cssColor).trim();
// rgb / rgba — direct channel-distance check.
const rgbM = /rgba?\(\s*(\d+)\s*,?\s+|\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)/.exec(s.replace(/rgba?\(\s*/, 'rgb(').replace(/,/g, ', '));
const rgbStrict = /rgba?\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)/.exec(s);
if (rgbStrict) {
const r = +rgbStrict[1], g = +rgbStrict[2], b = +rgbStrict[3];
return (Math.max(r, g, b) - Math.min(r, g, b)) >= 40;
}
// #hex — 3, 4, 6, or 8 digit.
const hexM = /^#([0-9a-f]{3,8})\b/i.exec(s);
if (hexM) {
let h = hexM[1];
if (h.length === 3 || h.length === 4) h = h.split('').map((c) => c + c).join('').slice(0, 6);
else h = h.slice(0, 6);
if (h.length === 6) {
const r = parseInt(h.slice(0, 2), 16);
const g = parseInt(h.slice(2, 4), 16);
const b = parseInt(h.slice(4, 6), 16);
return (Math.max(r, g, b) - Math.min(r, g, b)) >= 40;
}
}
// oklch(L C H) — chroma C is what matters. Typical neutral grays
// have C < 0.02; visible accents are 0.05+. CSS minification can
// collapse spaces between L% and C ("oklch(43%.15 34)"), so we
// extract all numbers and take the second rather than matching a
// strict L-then-whitespace-then-C pattern.
if (/^oklch\(/i.test(s)) {
const nums = s.match(/\d*\.\d+|\d+/g);
if (nums && nums.length >= 2) {
const c = parseFloat(nums[1]);
return !Number.isNaN(c) && c >= 0.05;
}
}
// hsl(H, S%, L%) — saturation > 20% reads as accent.
const hslM = /hsla?\(\s*[\d.]+\s*,\s*([\d.]+)%/i.exec(s);
if (hslM) {
const sat = parseFloat(hslM[1]);
return !Number.isNaN(sat) && sat >= 20;
}
return false;
}
// Sibling-relationship rule. Anchor on a hero-scale h1, look at the
// previousElementSibling, and gate on EITHER the classic tracked-
// uppercase eyebrow OR the modern accent-colored bold eyebrow.
function checkHeroEyebrow(opts) {
const {
headingTag, headingText, headingFontSize,
siblingTag, siblingText, siblingTextTransform,
siblingFontSize, siblingLetterSpacing,
siblingFontWeight, siblingColor,
} = opts;
if (headingTag !== 'h1') return [];
// We previously gated on headingFontSize >= 48 to anchor "hero scale".
// But modern hero h1s use clamp() / vw / var(--text-*), none of which
// jsdom can resolve — the computed value comes back as "2em" or
// "var(--text-9xl)" and parseFloat returns 2 or NaN. The gate fails
// on virtually every Tailwind v4 / framework build. The other gates
// (sibling text 2-60 chars, font-size ≤ 14px, accent-bold OR
// tracked-caps) are tight enough to avoid false positives on non-
// hero h1s — a tiny tan label directly above any h1 is the
// antipattern regardless of how big the h1 ends up.
if (!siblingTag) return [];
// An h2 above an h1 is a different anti-pattern (heading hierarchy / dual
// headings) — never an eyebrow.
if (HEADING_TAGS.has(siblingTag)) return [];
const text = (siblingText || '').trim();
if (text.length < 2 || text.length > 60) return [];
if (!(siblingFontSize > 0 && siblingFontSize <= 14)) return [];
// Branch A: classic tracked-uppercase eyebrow.
const isUppercased = siblingTextTransform === 'uppercase'
|| (/[A-Z]/.test(text) && !/[a-z]/.test(text));
const isClassicTracked = isUppercased && siblingLetterSpacing >= 1.6;
// Branch B: modern accent-bold eyebrow — sentence case, low
// tracking, but bold + accent-colored. The style choices changed;
// the pattern is the same kicker-above-headline anti-pattern.
const weight = Number(siblingFontWeight) || 400;
const isAccentBold = weight >= 700 && isAccentColor(siblingColor || '');
if (!isClassicTracked && !isAccentBold) return [];
const headingTextSnippet = (headingText || '').trim().slice(0, 60);
const eyebrowSnippet = text.slice(0, 40);
const style = isClassicTracked ? 'tracked-caps' : 'accent-bold';
return [{
id: 'hero-eyebrow-chip',
snippet: `eyebrow chip (${style}) "${eyebrowSnippet}" above ${headingTag} "${headingTextSnippet}"`,
}];
}
function checkRepeatedSectionKickers(opts) {
const { candidates, minCount = 3 } = opts;
if (!Array.isArray(candidates) || candidates.length < minCount) return [];
return candidates.map(candidate => ({
id: 'repeated-section-kickers',
snippet: `repeated section kicker "${candidate.kickerText}" before ${candidate.headingTag} "${candidate.headingText}" (${candidates.length} on page)`,
}));
}
const LAYOUT_TRANSITION_PROPS = new Set([
'width', 'height', 'padding', 'margin',
'max-height', 'max-width', 'min-height', 'min-width',
'padding-top', 'padding-right', 'padding-bottom', 'padding-left',
'margin-top', 'margin-right', 'margin-bottom', 'margin-left',
]);
function checkMotion(opts) {
const { tag, transitionProperty, animationName, timingFunctions, classList } = opts;
if (SAFE_TAGS.has(tag)) return [];
const findings = [];
// --- Bounce/elastic easing ---
if (animationName && animationName !== 'none' && /bounce|elastic|wobble|jiggle|spring/i.test(animationName)) {
findings.push({ id: 'bounce-easing', snippet: `animation: ${animationName}` });
}
if (classList && /\banimate-bounce\b/.test(classList)) {
findings.push({ id: 'bounce-easing', snippet: 'animate-bounce (Tailwind)' });
}
// Check timing functions for overshoot cubic-bezier (y values outside [0, 1])
if (timingFunctions) {
const bezierRe = /cubic-bezier\(\s*([\d.-]+)\s*,\s*([\d.-]+)\s*,\s*([\d.-]+)\s*,\s*([\d.-]+)\s*\)/g;
let m;
while ((m = bezierRe.exec(timingFunctions)) !== null) {
const y1 = parseFloat(m[2]), y2 = parseFloat(m[4]);
if (y1 < -0.1 || y1 > 1.1 || y2 < -0.1 || y2 > 1.1) {
findings.push({ id: 'bounce-easing', snippet: `cubic-bezier(${m[1]}, ${m[2]}, ${m[3]}, ${m[4]})` });
break;
}
}
}
// --- Layout property transition ---
if (transitionProperty && transitionProperty !== 'all' && transitionProperty !== 'none') {
const props = transitionProperty.split(',').map(p => p.trim().toLowerCase());
const layoutFound = props.filter(p => LAYOUT_TRANSITION_PROPS.has(p));
if (layoutFound.length > 0) {
findings.push({ id: 'layout-transition', snippet: `transition: ${layoutFound.join(', ')}` });
}
}
return findings;
}
function checkGlow(opts) {
const { boxShadow, effectiveBg } = opts;
if (!boxShadow || boxShadow === 'none') return [];
if (!effectiveBg) return [];
// Only flag on dark backgrounds (luminance < 0.1)
const bgLum = relativeLuminance(effectiveBg);
if (bgLum >= 0.1) return [];
// Split multiple shadows (commas not inside parentheses)
const parts = boxShadow.split(/,(?![^(]*\))/);
for (const shadow of parts) {
const colorMatch = shadow.match(/rgba?\([^)]+\)/);
if (!colorMatch) continue;
const color = parseRgb(colorMatch[0]);
if (!color || !hasChroma(color, 30)) continue;
// Extract px values — in computed style: "color Xpx Ypx BLURpx [SPREADpx]"
const afterColor = shadow.substring(shadow.indexOf(colorMatch[0]) + colorMatch[0].length);
const beforeColor = shadow.substring(0, shadow.indexOf(colorMatch[0]));
const pxVals = [...beforeColor.matchAll(/([\d.]+)px/g), ...afterColor.matchAll(/([\d.]+)px/g)]
.map(m => parseFloat(m[1]));
// Third value is blur (offset-x, offset-y, blur, [spread])
if (pxVals.length >= 3 && pxVals[2] > 4) {
return [{ id: 'dark-glow', snippet: `Colored glow (${colorToHex(color)}) on dark background` }];
}
}
return [];
}
/**
* Regex-on-HTML checks shared between browser and Node page-level detection.
* These don't need DOM access, just the raw HTML string.
*/
function checkHtmlPatterns(html) {
const findings = [];
// --- Color ---
// AI color palette: purple/violet
const purpleHexRe = /#(?:7c3aed|8b5cf6|a855f7|9333ea|7e22ce|6d28d9|6366f1|764ba2|667eea)\b/gi;
if (purpleHexRe.test(html)) {
const purpleTextRe = /(?:(?:^|;)\s*color\s*:\s*(?:.*?)(?:#(?:7c3aed|8b5cf6|a855f7|9333ea|7e22ce|6d28d9))|gradient.*?#(?:7c3aed|8b5cf6|a855f7|764ba2|667eea))/gi;
if (purpleTextRe.test(html)) {
findings.push({ id: 'ai-color-palette', snippet: 'Purple/violet accent colors detected' });
}
}
// Gradient text (background-clip: text + gradient)
const gradientRe = /(?:-webkit-)?background-clip\s*:\s*text/gi;
let gm;
while ((gm = gradientRe.exec(html)) !== null) {
const start = Math.max(0, gm.index - 200);
const context = html.substring(start, gm.index + gm[0].length + 200);
if (/gradient/i.test(context)) {
findings.push({ id: 'gradient-text', snippet: 'background-clip: text + gradient' });
break;
}
}
if (/\bbg-clip-text\b/.test(html) && /\bbg-gradient-to-/.test(html)) {
findings.push({ id: 'gradient-text', snippet: 'bg-clip-text + bg-gradient (Tailwind)' });
}
// --- Layout ---
// Monotonous spacing
const spacingValues = [];
const spacingRe = /(?:padding|margin)(?:-(?:top|right|bottom|left))?\s*:\s*(\d+)px/gi;
let sm;
while ((sm = spacingRe.exec(html)) !== null) {
const v = parseInt(sm[1], 10);
if (v > 0 && v < 200) spacingValues.push(v);
}
const gapRe = /gap\s*:\s*(\d+)px/gi;
while ((sm = gapRe.exec(html)) !== null) {
spacingValues.push(parseInt(sm[1], 10));
}
const twSpaceRe = /\b(?:p|px|py|pt|pb|pl|pr|m|mx|my|mt|mb|ml|mr|gap)-(\d+)\b/g;
while ((sm = twSpaceRe.exec(html)) !== null) {
spacingValues.push(parseInt(sm[1], 10) * 4);
}
const remSpacingRe = /(?:padding|margin)(?:-(?:top|right|bottom|left))?\s*:\s*([\d.]+)rem/gi;
while ((sm = remSpacingRe.exec(html)) !== null) {
const v = Math.round(parseFloat(sm[1]) * 16);
if (v > 0 && v < 200) spacingValues.push(v);
}
const roundedSpacing = spacingValues.map(v => Math.round(v / 4) * 4);
if (roundedSpacing.length >= 10) {
const counts = {};
for (const v of roundedSpacing) counts[v] = (counts[v] || 0) + 1;
const maxCount = Math.max(...Object.values(counts));
const dominantPct = maxCount / roundedSpacing.length;
const unique = [...new Set(roundedSpacing)].filter(v => v > 0);
if (dominantPct > 0.6 && unique.length <= 3) {
const dominant = Object.entries(counts).sort((a, b) => b[1] - a[1])[0][0];
findings.push({
id: 'monotonous-spacing',
snippet: `~${dominant}px used ${maxCount}/${roundedSpacing.length} times (${Math.round(dominantPct * 100)}%)`,
});
}
}
// --- Motion ---
// Bounce/elastic animation names
const bounceRe = /animation(?:-name)?\s*:\s*[^;]*\b(bounce|elastic|wobble|jiggle|spring)\b/gi;
if (bounceRe.test(html)) {
findings.push({ id: 'bounce-easing', snippet: 'Bounce/elastic animation in CSS' });
}
// Overshoot cubic-bezier
const bezierRe = /cubic-bezier\(\s*([\d.-]+)\s*,\s*([\d.-]+)\s*,\s*([\d.-]+)\s*,\s*([\d.-]+)\s*\)/g;
let bm;
while ((bm = bezierRe.exec(html)) !== null) {
const y1 = parseFloat(bm[2]), y2 = parseFloat(bm[4]);
if (y1 < -0.1 || y1 > 1.1 || y2 < -0.1 || y2 > 1.1) {
findings.push({ id: 'bounce-easing', snippet: `cubic-bezier(${bm[1]}, ${bm[2]}, ${bm[3]}, ${bm[4]})` });
break;
}
}
// Layout property transitions
const transRe = /transition(?:-property)?\s*:\s*([^;{}]+)/gi;
let tm;
while ((tm = transRe.exec(html)) !== null) {
const val = tm[1].toLowerCase();
if (/\ball\b/.test(val)) continue;
const found = val.match(/\b(?:(?:max|min)-)?(?:width|height)\b|\bpadding(?:-(?:top|right|bottom|left))?\b|\bmargin(?:-(?:top|right|bottom|left))?\b/gi);
if (found) {
findings.push({ id: 'layout-transition', snippet: `transition: ${found.join(', ')}` });
break;
}
}
// --- Dark glow ---
const darkBgRe = /background(?:-color)?\s*:\s*(?:#(?:0[0-9a-f]|1[0-9a-f]|2[0-3])[0-9a-f]{4}\b|#(?:0|1)[0-9a-f]{2}\b|rgb\(\s*(\d{1,2})\s*,\s*(\d{1,2})\s*,\s*(\d{1,2})\s*\))/gi;
const twDarkBg = /\bbg-(?:gray|slate|zinc|neutral|stone)-(?:9\d{2}|800)\b/;
if (darkBgRe.test(html) || twDarkBg.test(html)) {
const shadowRe = /box-shadow\s*:\s*([^;{}]+)/gi;
let shm;
while ((shm = shadowRe.exec(html)) !== null) {
const val = shm[1];
const colorMatch = val.match(/rgba?\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)/);
if (!colorMatch) continue;
const [r, g, b] = [+colorMatch[1], +colorMatch[2], +colorMatch[3]];
if ((Math.max(r, g, b) - Math.min(r, g, b)) < 30) continue;
const pxVals = [...val.matchAll(/(\d+)px|(?<![.\d])\b(0)\b(?![.\d])/g)].map(p => +(p[1] || p[2]));
if (pxVals.length >= 3 && pxVals[2] > 4) {
findings.push({ id: 'dark-glow', snippet: `Colored glow (rgb(${r},${g},${b})) on dark page` });
break;
}
}
}
// --- Provider tells (gated): repeating-gradient stripes (GPT) ---
if (/repeating-(?:linear|radial|conic)-gradient\s*\(/i.test(html)) {
findings.push({ id: 'repeating-stripes-gradient', snippet: 'repeating-gradient decorative stripes' });
}
// --- Provider tells (gated): "X theater" framing copy (GPT) ---
// Lives here (regex-on-HTML) rather than in the text-content analyzers so it
// runs in the bundled browser path too, not just the CLI/static path.
{
const bodyText = html
.replace(/<script\b[^>]*>[\s\S]*?<\/script>/gi, ' ')
.replace(/<style\b[^>]*>[\s\S]*?<\/style>/gi, ' ')
.replace(/<[^>]+>/g, ' ');
const tm = /\b(\w+)\s+theater\b/i.exec(bodyText);
if (tm) findings.push({ id: 'theater-slop-phrase', snippet: `"${tm[0].trim()}"` });
}
// --- Provider tells (gated): image hover transform (Gemini) ---
// A CSS `img...:hover { transform: ... }` rule, or a Tailwind hover:scale /
// hover:rotate / hover:translate utility on an <img>. Each distinct
// mechanism is its own finding.
const imgHoverCss = /\bimg\b[^,{}]*:hover\b[^{}]*\{[^}]*\btransform\s*:\s*(?:scale|rotate|translate|matrix|skew)/i;
if (imgHoverCss.test(html)) {
findings.push({ id: 'image-hover-transform', snippet: 'img:hover { transform } rule' });
}
const imgTagRe = /<img\b[^>]*\bclass\s*=\s*"([^"]*)"/gi;
let im;
while ((im = imgTagRe.exec(html)) !== null) {
if (/\bhover:(?:scale|rotate|translate|skew)-/.test(im[1])) {
findings.push({ id: 'image-hover-transform', snippet: 'Tailwind hover transform on <img>' });
}
}
return findings;
}
// ─── Section 4: resolveBackground (unified) ─────────────────────────────────
// Read the element's own background color, computed-style first, with a
// jsdom-friendly fallback that parses the inline `background:` shorthand
// from the raw style attribute. jsdom (~v29) does not decompose the
// shorthand into `backgroundColor`, so without this fallback the CLI silently
// returns null for any element styled via `background: rgb(...)` or
// `background: #abc`. Real browsers always decompose, so the fallback is
// a no-op there.
function readOwnBackgroundColor(el, computedStyle) {
const bg = parseRgb(computedStyle.backgroundColor);
if (DETECTOR_IS_BROWSER || (bg && bg.a >= 0.1)) return bg;
const rawStyle = el.getAttribute?.('style') || '';
const bgMatch = rawStyle.match(/background(?:-color)?\s*:\s*([^;]+)/i);
const inlineBg = bgMatch ? bgMatch[1].trim() : '';
if (!inlineBg) return bg;
if (/gradient/i.test(inlineBg) || /url\s*\(/i.test(inlineBg)) return bg;
const fromRgb = parseRgb(inlineBg);
if (fromRgb) return fromRgb;
const hexMatch = inlineBg.match(/#([0-9a-f]{6}|[0-9a-f]{3})\b/i);
if (hexMatch) {
const h = hexMatch[1];
if (h.length === 6) {
return { r: parseInt(h.slice(0, 2), 16), g: parseInt(h.slice(2, 4), 16), b: parseInt(h.slice(4, 6), 16), a: 1 };
}
return { r: parseInt(h[0] + h[0], 16), g: parseInt(h[1] + h[1], 16), b: parseInt(h[2] + h[2], 16), a: 1 };
}
return bg;
}
function resolveBackground(el, win, customPropMap) {
let current = el;
while (current && current.nodeType === 1) {
const style = DETECTOR_IS_BROWSER ? getComputedStyle(current) : win.getComputedStyle(current);
const bgImage = style.backgroundImage || '';
const hasGradientOrUrl = bgImage && bgImage !== 'none' && (/gradient/i.test(bgImage) || /url\s*\(/i.test(bgImage));
// Try the solid bg-color FIRST. If the element has both a solid color
// and a gradient/url overlay (a common pattern: `background: var(--paper)
// radial-gradient(...)` for paper-grain texture), the solid color is the
// dominant visible surface for contrast purposes; the overlay is
// decorative. The old behavior bailed on any gradient ancestor, which
// caused massive false-positive contrast findings on grain-textured
// body backgrounds.
let bg = parseRgb(style.backgroundColor);
if (!DETECTOR_IS_BROWSER && (!bg || bg.a < 0.1)) {
// jsdom returns literal "var(--X)" / "oklch(...)" strings. Resolve
// through customPropMap so Tailwind v4 color tokens become RGB.
if (customPropMap) {
bg = parseColorResolved(style.backgroundColor, customPropMap);
}
if (!bg || bg.a < 0.1) {
// Inline-style fallback. jsdom doesn't decompose background
// shorthand, so colors set via inline style are otherwise invisible.
const rawStyle = current.getAttribute?.('style') || '';
const bgMatch = rawStyle.match(/background(?:-color)?\s*:\s*([^;]+)/i);
const inlineBg = bgMatch ? bgMatch[1].trim() : '';
if (inlineBg && !/gradient/i.test(inlineBg) && !/url\s*\(/i.test(inlineBg)) {
bg = parseColorResolved(inlineBg, customPropMap) || parseAnyColor(inlineBg);
}
}
}
if (bg && bg.a > 0.1) {
if (DETECTOR_IS_BROWSER || bg.a >= 0.5) return bg;
}
// No solid bg-color at this level. If THIS level has a gradient/url
// with no underlying solid color we can read:
// • on body/html: assume white. Body-level gradients are almost
// always decorative texture (paper grain, noise) on top of a
// solid bg-color the page set via `background: var(--paper)`
// shorthand — which jsdom can't decompose into bg-color. The
// downstream gradient-stops fallback path produces catastrophic
// false positives in this case (gradient noise stops have
// accidental browns/blacks that look like card backgrounds).
// • on other elements: bail to null and let the caller fall back
// to gradient stops (gradient buttons / hero sections are real
// bgs worth checking against).
if (hasGradientOrUrl) {
if (current.tagName === 'BODY' || current.tagName === 'HTML') {
return { r: 255, g: 255, b: 255, a: 1 };
}
return null;
}
current = current.parentElement;
}
return { r: 255, g: 255, b: 255 };
}
// Walk parents looking for a gradient background and return its color stops.
// Used as a fallback when resolveBackground() returns null because the
// effective background is a gradient (no single solid color to compare against).
function resolveGradientStops(el, win) {
let current = el;
while (current && current.nodeType === 1) {
const style = DETECTOR_IS_BROWSER ? getComputedStyle(current) : win.getComputedStyle(current);
const bgImage = style.backgroundImage || '';
if (bgImage && bgImage !== 'none' && /gradient/i.test(bgImage)) {
const stops = parseGradientColors(bgImage);
if (stops.length > 0) return stops;
}
if (!DETECTOR_IS_BROWSER) {
// jsdom doesn't decompose `background:` shorthand — peek at the raw inline style
const rawStyle = current.getAttribute?.('style') || '';
const bgMatch = rawStyle.match(/background(?:-image)?\s*:\s*([^;]+)/i);
if (bgMatch && /gradient/i.test(bgMatch[1])) {
const stops = parseGradientColors(bgMatch[1]);
if (stops.length > 0) return stops;
}
}
current = current.parentElement;
}
return null;
}
// Parse a single CSS length token to pixels. Accepts "12px", "50%", a
// shorthand like "12px 4px" (uses the first value), or empty / null.
// Returns the pixel value, or null when the input is unparseable.
// Percentages convert against `widthPx` when one is supplied. Without a
// usable width (jsdom returns "auto" for many real-world elements,
// which parseFloat collapses to 0), fall back to the raw percentage
// number so callers gating on `> 0` (border-accent-on-rounded,
// isCardLike's hasRadius) still see a positive value, matching the
// original parseFloat("50%") === 50 behavior.
function parseRadiusToPx(value, widthPx) {
if (!value || typeof value !== 'string') return null;
const trimmed = value.trim();
if (!trimmed) return null;
const first = trimmed.split(/\s+/)[0];
const num = parseFloat(first);
if (Number.isNaN(num)) return null;
if (/%$/.test(first)) {
if (widthPx && widthPx > 0) return (num / 100) * widthPx;
return num;
}
return num;
}
function resolveBorderRadiusPx(el, style, widthPx, win) {
const fromComputed = parseRadiusToPx(style.borderRadius, widthPx);
if (fromComputed !== null) return fromComputed;
return 0;
}
// ─── Section 5: Element Adapters ────────────────────────────────────────────
// Browser adapters — call getComputedStyle/getBoundingClientRect on live DOM
function checkElementBordersDOM(el) {
const tag = el.tagName.toLowerCase();
if (BORDER_SAFE_TAGS.has(tag)) return [];
const rect = el.getBoundingClientRect();
if (rect.width < 20 || rect.height < 20) return [];
const style = getComputedStyle(el);
const sides = ['Top', 'Right', 'Bottom', 'Left'];
const widths = {}, colors = {};
for (const s of sides) {
widths[s] = parseFloat(style[`border${s}Width`]) || 0;
colors[s] = style[`border${s}Color`] || '';
}
return checkBorders(tag, widths, colors, parseFloat(style.borderRadius) || 0);
}
function checkElementColorsDOM(el) {
const tag = el.tagName.toLowerCase();
// No early SAFE_TAGS bail here — checkColors() does its own gating that
// includes the styled-button exception for <a> / <button> with their own
// opaque background. Bailing here would prevent that exception from firing.
const rect = el.getBoundingClientRect();
if (rect.width < 10 || rect.height < 10) return [];
const style = getComputedStyle(el);
const directText = [...el.childNodes].filter(n => n.nodeType === 3).map(n => n.textContent).join('');
const hasDirectText = directText.trim().length > 0;
const effectiveBg = resolveBackground(el);
return checkColors({
tag,
textColor: parseRgb(style.color),
bgColor: readOwnBackgroundColor(el, style),
effectiveBg,
effectiveBgStops: effectiveBg ? null : resolveGradientStops(el),
fontSize: parseFloat(style.fontSize) || 16,
fontWeight: parseInt(style.fontWeight) || 400,
hasDirectText,
isEmojiOnly: isEmojiOnlyText(directText),
bgClip: style.webkitBackgroundClip || style.backgroundClip || '',
bgImage: style.backgroundImage || '',
classList: el.getAttribute('class') || '',
});
}
function checkElementIconTileDOM(el) {
const tag = el.tagName.toLowerCase();
if (!HEADING_TAGS.has(tag)) return [];
const sibling = el.previousElementSibling;
if (!sibling) return [];
const sibRect = sibling.getBoundingClientRect();
const headRect = el.getBoundingClientRect();
const sibStyle = getComputedStyle(sibling);
// The tile may either contain an <svg>/<i> icon child, OR the tile itself
// may contain an emoji/symbol character directly as its only text content
// (the "card-icon" pattern from many AI-generated demos).
const iconChild = sibling.querySelector('svg, i[data-lucide], i[class*="fa-"], i[class*="icon"]');
const iconRect = iconChild?.getBoundingClientRect();
const sibDirectText = [...sibling.childNodes].filter(n => n.nodeType === 3).map(n => n.textContent).join('');
const hasInlineEmojiIcon = sibling.children.length === 0 && isEmojiOnlyText(sibDirectText);
return checkIconTile({
headingTag: tag,
headingText: el.textContent || '',
headingTop: headRect.top,
siblingTag: sibling.tagName.toLowerCase(),
siblingWidth: sibRect.width,
siblingHeight: sibRect.height,
siblingBottom: sibRect.bottom,
siblingBgColor: parseRgb(sibStyle.backgroundColor),
siblingBgImage: sibStyle.backgroundImage || '',
siblingBorderWidth: parseFloat(sibStyle.borderTopWidth) || 0,
siblingBorderRadius: parseFloat(sibStyle.borderRadius) || 0,
hasIconChild: !!iconChild || hasInlineEmojiIcon,
iconChildWidth: iconRect?.width || 0,
});
}
function checkElementItalicSerifDOM(el) {
const tag = el.tagName.toLowerCase();
if (tag !== 'h1' && tag !== 'h2') return [];
const style = getComputedStyle(el);
return checkItalicSerif({
tag,
fontStyle: style.fontStyle || '',
fontFamily: style.fontFamily || '',
fontSize: parseFloat(style.fontSize) || 0,
headingText: el.textContent || '',
});
}
function checkElementHeroEyebrowDOM(el) {
const tag = el.tagName.toLowerCase();
if (tag !== 'h1') return [];
const sibling = el.previousElementSibling;
if (!sibling) return [];
const headStyle = getComputedStyle(el);
const sibStyle = getComputedStyle(sibling);
return checkHeroEyebrow({
headingTag: tag,
headingText: el.textContent || '',
headingFontSize: parseFloat(headStyle.fontSize) || 0,
siblingTag: sibling.tagName.toLowerCase(),
siblingText: sibling.textContent || '',
siblingTextTransform: sibStyle.textTransform || '',
siblingFontSize: parseFloat(sibStyle.fontSize) || 0,
siblingLetterSpacing: parseFloat(sibStyle.letterSpacing) || 0,
siblingFontWeight: sibStyle.fontWeight || '',
siblingColor: sibStyle.color || '',
});
}
// Build a map of CSS custom properties declared on :root / :host / html.
// Used to resolve var(--X) refs that jsdom returns verbatim in
// getComputedStyle. Tailwind v4 routes every utility class through
// CSS vars (font-weight: var(--font-weight-bold), font-size:
// var(--text-xs), letter-spacing: var(--tracking-widest)), so without
// resolution every style-based check silently fails on Tailwind v4
// builds — the values come back as literal "var(--font-weight-bold)"
// strings and parseFloat returns NaN.
function buildCustomPropMap(document) {
const map = new Map();
let sheets;
try { sheets = Array.from(document.styleSheets || []); }
catch { return map; }
for (const sheet of sheets) {
let rules;
try { rules = Array.from(sheet.cssRules || []); }
catch { continue; }
for (const rule of rules) {
// Style rules only (type 1). Walk @media / @supports if present.
if (rule.type === 4 /* MEDIA_RULE */ || rule.type === 12 /* SUPPORTS_RULE */) {
try { rules.push(...Array.from(rule.cssRules || [])); } catch { /* ignore */ }
continue;
}
if (rule.type !== 1 /* STYLE_RULE */) continue;
const sel = rule.selectorText || '';
if (!/(^|,\s*)(:root|html|:host)\b/i.test(sel)) continue;
const style = rule.style;
if (!style) continue;
for (let i = 0; i < style.length; i++) {
const prop = style[i];
if (!prop || !prop.startsWith('--')) continue;
const val = style.getPropertyValue(prop).trim();
if (val) map.set(prop, val);
}
}
}
return map;
}
// Resolve var(--X[, fallback]) refs in a computed-style value string.
// Recurses up to 8 levels for chained refs (--a: var(--b)). Returns
// the original string when no refs are present or the chain doesn't
// resolve. Safe to call on already-resolved values.
function resolveVarRefs(raw, customPropMap, depth = 0) {
if (typeof raw !== 'string' || !raw.includes('var(')) return raw;
if (depth > 8) return raw;
return raw.replace(/var\(\s*(--[a-zA-Z0-9_-]+)\s*(?:,\s*([^)]+))?\)/g, (_m, name, fallback) => {
const v = customPropMap.get(name);
if (v != null) return resolveVarRefs(v, customPropMap, depth + 1);
return fallback ? resolveVarRefs(fallback.trim(), customPropMap, depth + 1) : _m;
});
}
// OKLCH → sRGB conversion (Björn Ottosson's matrices). L in 0..1 (or %),
// C in 0..~0.4 typical, H in degrees. Returns clamped {r,g,b,a:1} in 0..255.
// Needed because jsdom doesn't compute oklch() values — getComputedStyle
// returns the literal "oklch(...)" string. Without this, the entire
// Tailwind v4 color palette (which is OKLCH-based) is invisible to the
// detector's contrast / color checks.
function oklchToRgb(L, C, H) {
const hRad = (H * Math.PI) / 180;
const a = C * Math.cos(hRad);
const b = C * Math.sin(hRad);
const l_ = L + 0.3963377774 * a + 0.2158037573 * b;
const m_ = L - 0.1055613458 * a - 0.0638541728 * b;
const s_ = L - 0.0894841775 * a - 1.2914855480 * b;
const lc = l_ * l_ * l_, mc = m_ * m_ * m_, sc = s_ * s_ * s_;
const rLin = 4.0767416621 * lc - 3.3077115913 * mc + 0.2309699292 * sc;
const gLin = -1.2684380046 * lc + 2.6097574011 * mc - 0.3413193965 * sc;
const bLin = -0.0041960863 * lc - 0.7034186147 * mc + 1.7076147010 * sc;
const enc = (x) => {
const c = Math.max(0, Math.min(1, x));
return c <= 0.0031308 ? 12.92 * c : 1.055 * Math.pow(c, 1 / 2.4) - 0.055;
};
return {
r: Math.round(enc(rLin) * 255),
g: Math.round(enc(gLin) * 255),
b: Math.round(enc(bLin) * 255),
a: 1,
};
}
// Extended color parser: rgb/rgba/hex/oklch. Returns null on no match.
// Use this when the input might be any CSS color form; use plain parseRgb
// when you only expect computed rgb() values from real browsers.
function parseAnyColor(s) {
if (!s || typeof s !== 'string') return null;
const str = s.trim();
if (str === 'transparent' || str === 'currentcolor' || str === 'inherit') return null;
let m;
m = str.match(/rgba?\(\s*(\d+(?:\.\d+)?)\s*,?\s*(\d+(?:\.\d+)?)\s*,?\s*(\d+(?:\.\d+)?)(?:\s*[,/]\s*([\d.]+))?\s*\)/);
if (m) return { r: Math.round(+m[1]), g: Math.round(+m[2]), b: Math.round(+m[3]), a: m[4] !== undefined ? +m[4] : 1 };
m = str.match(/^#([0-9a-f]{3,8})$/i);
if (m) {
const h = m[1];
if (h.length === 3 || h.length === 4) {
return {
r: parseInt(h[0] + h[0], 16),
g: parseInt(h[1] + h[1], 16),
b: parseInt(h[2] + h[2], 16),
a: h.length === 4 ? parseInt(h[3] + h[3], 16) / 255 : 1,
};
}
if (h.length === 6 || h.length === 8) {
return {
r: parseInt(h.slice(0, 2), 16),
g: parseInt(h.slice(2, 4), 16),
b: parseInt(h.slice(4, 6), 16),
a: h.length === 8 ? parseInt(h.slice(6, 8), 16) / 255 : 1,
};
}
}
// OKLCH parser. Tailwind v4's CSS minifier squishes the space after
// `%` ("21.5%.02 50"), so the separator between L and C may be absent.
// Match L (with optional %), then C and H separated permissively.
m = str.match(/oklch\(\s*([\d.]+)(%?)\s*[\s,]*\s*([\d.]+)\s*[\s,]+\s*([-\d.]+)(?:deg)?\s*\)/i);
if (m) {
const Lnum = parseFloat(m[1]);
const L = m[2] === '%' ? Lnum / 100 : Lnum;
return oklchToRgb(L, parseFloat(m[3]), parseFloat(m[4]));
}
return null;
}
// Resolve var() refs in a color string (via customPropMap), then parse.
// Returns null on any failure. Used in jsdom-mode paths where
// getComputedStyle returns literal "var(--X)" or "oklch(...)" strings.
function parseColorResolved(str, customPropMap) {
if (!str) return null;
const resolved = customPropMap ? resolveVarRefs(str, customPropMap) : str;
return parseAnyColor(resolved);
}
const REPEATED_KICKER_SKIP_SELECTOR = [
'nav',
'form',
'table',
'thead',
'tbody',
'tfoot',
'figure',
'figcaption',
'ol',
'ul',
'li',
'[role="navigation"]',
'[aria-label*="breadcrumb" i]',
'[class*="breadcrumb" i]',
'[data-impeccable-allow-kickers]',
].join(',');
function cleanInlineText(el) {
return [...el.childNodes]
.filter(n => n.nodeType === 3)
.map(n => n.textContent)
.join(' ')
.replace(/\s+/g, ' ')
.trim();
}
function isRepeatedKickerCandidate(opts) {
const {
headingTag,
headingText,
headingFontSize,
kickerTag,
kickerText,
kickerTextTransform,
kickerFontSize,
kickerLetterSpacing,
} = opts;
if (!['h2', 'h3', 'h4'].includes(headingTag)) return false;
if (!headingText || headingText.length < 3) return false;
if (!(headingFontSize >= 20)) return false;
if (!kickerTag || HEADING_TAGS.has(kickerTag)) return false;
if (!['p', 'span', 'div', 'small'].includes(kickerTag)) return false;
if (!kickerText || kickerText.length < 2 || kickerText.length > 34) return false;
if (/^step\s*\d+/i.test(kickerText) || /^\d{1,2}$/.test(kickerText)) return false;
const isUppercased = kickerTextTransform === 'uppercase'
|| (/[A-Z]/.test(kickerText) && !/[a-z]/.test(kickerText));
if (!isUppercased) return false;
if (!(kickerFontSize > 0 && kickerFontSize <= 14)) return false;
const minTrackedSpacing = Math.max(1, kickerFontSize * 0.08);
if (!(kickerLetterSpacing >= minTrackedSpacing)) return false;
return true;
}
function collectRepeatedSectionKickerCandidates(doc, getStyle, resolveLetterSpacing) {
const candidates = [];
for (const heading of doc.querySelectorAll('h2, h3, h4')) {
if (heading.closest?.(REPEATED_KICKER_SKIP_SELECTOR)) continue;
const kicker = heading.previousElementSibling;
if (!kicker || kicker.closest?.(REPEATED_KICKER_SKIP_SELECTOR)) continue;
const headingStyle = getStyle(heading);
const kickerStyle = getStyle(kicker);
const headingText = (heading.textContent || '').replace(/\s+/g, ' ').trim();
const kickerText = cleanInlineText(kicker) || (kicker.textContent || '').replace(/\s+/g, ' ').trim();
const headingFontSize = resolveLetterSpacing(headingStyle.fontSize || '', 16) || parseFloat(headingStyle.fontSize) || 0;
const kickerFontSize = resolveLetterSpacing(kickerStyle.fontSize || '', 16) || parseFloat(kickerStyle.fontSize) || 0;
const kickerLetterSpacing = resolveLetterSpacing(kickerStyle.letterSpacing || '', kickerFontSize);
if (!isRepeatedKickerCandidate({
headingTag: heading.tagName.toLowerCase(),
headingText,
headingFontSize,
kickerTag: kicker.tagName.toLowerCase(),
kickerText,
kickerTextTransform: kickerStyle.textTransform || '',
kickerFontSize,
kickerLetterSpacing,
})) {
continue;
}
candidates.push({
headingTag: heading.tagName.toLowerCase(),
headingText: headingText.replace(/^"|"$/g, '').slice(0, 60),
kickerText: kickerText.slice(0, 40),
});
}
return candidates;
}
function checkRepeatedSectionKickersDOM() {
const candidates = collectRepeatedSectionKickerCandidates(
document,
(el) => getComputedStyle(el),
(value, fontSize) => resolveLengthPx(value, fontSize) || 0,
);
return checkRepeatedSectionKickers({ candidates });
}
function checkElementMotionDOM(el) {
const tag = el.tagName.toLowerCase();
if (SAFE_TAGS.has(tag)) return [];
const style = getComputedStyle(el);
return checkMotion({
tag,
transitionProperty: style.transitionProperty || '',
animationName: style.animationName || '',
timingFunctions: [style.animationTimingFunction, style.transitionTimingFunction].filter(Boolean).join(' '),
classList: el.getAttribute('class') || '',
});
}
function checkElementGlowDOM(el) {
const tag = el.tagName.toLowerCase();
const style = getComputedStyle(el);
if (!style.boxShadow || style.boxShadow === 'none') return [];
// Use parent's background — glow radiates outward, so the surrounding context matters
// If resolveBackground returns null (gradient), try to infer from the gradient colors
let parentBg = el.parentElement ? resolveBackground(el.parentElement) : resolveBackground(el);
if (!parentBg) {
// Gradient background — sample its colors to determine if it's dark
let cur = el.parentElement;
while (cur && cur.nodeType === 1) {
const bgImage = getComputedStyle(cur).backgroundImage || '';
const gradColors = parseGradientColors(bgImage);
if (gradColors.length > 0) {
// Average the gradient colors
const avg = { r: 0, g: 0, b: 0 };
for (const c of gradColors) { avg.r += c.r; avg.g += c.g; avg.b += c.b; }
avg.r = Math.round(avg.r / gradColors.length);
avg.g = Math.round(avg.g / gradColors.length);
avg.b = Math.round(avg.b / gradColors.length);
parentBg = avg;
break;
}
cur = cur.parentElement;
}
}
return checkGlow({ tag, boxShadow: style.boxShadow, effectiveBg: parentBg });
}
function checkElementAIPaletteDOM(el) {
const style = getComputedStyle(el);
const findings = [];
// Check gradient backgrounds for purple/violet or cyan
const bgImage = style.backgroundImage || '';
const gradColors = parseGradientColors(bgImage);
for (const c of gradColors) {
if (hasChroma(c, 50)) {
const hue = getHue(c);
if (hue >= 260 && hue <= 310) {
findings.push({ id: 'ai-color-palette', snippet: 'Purple/violet gradient background' });
break;
}
if (hue >= 160 && hue <= 200) {
findings.push({ id: 'ai-color-palette', snippet: 'Cyan gradient background' });
break;
}
}
}
// Check for neon text (vivid cyan/purple color on dark background)
const textColor = parseRgb(style.color);
if (textColor && hasChroma(textColor, 80)) {
const hue = getHue(textColor);
const isAIPalette = (hue >= 160 && hue <= 200) || (hue >= 260 && hue <= 310);
if (isAIPalette) {
const parentBg = el.parentElement ? resolveBackground(el.parentElement) : null;
// Also check gradient parents
let effectiveBg = parentBg;
if (!effectiveBg) {
let cur = el.parentElement;
while (cur && cur.nodeType === 1) {
const gi = getComputedStyle(cur).backgroundImage || '';
const gc = parseGradientColors(gi);
if (gc.length > 0) {
const avg = { r: 0, g: 0, b: 0 };
for (const c of gc) { avg.r += c.r; avg.g += c.g; avg.b += c.b; }
avg.r = Math.round(avg.r / gc.length);
avg.g = Math.round(avg.g / gc.length);
avg.b = Math.round(avg.b / gc.length);
effectiveBg = avg;
break;
}
cur = cur.parentElement;
}
}
if (effectiveBg && relativeLuminance(effectiveBg) < 0.1) {
const label = hue >= 260 ? 'Purple/violet' : 'Cyan';
findings.push({ id: 'ai-color-palette', snippet: `${label} neon text on dark background` });
}
}
}
return findings;
}
const QUALITY_TEXT_TAGS = new Set(['p', 'li', 'td', 'th', 'dd', 'blockquote', 'figcaption']);
// Resolve a CSS font-size value to pixels by walking up the parent chain.
// Browsers resolve em/rem/% to px in getComputedStyle, but jsdom returns the
// specified value verbatim — so for the Node path we walk parents ourselves.
function resolveFontSizePx(el, win) {
const chain = []; // raw font-size strings, leaf → root
let cur = el;
while (cur && cur.nodeType === 1) {
const fs = (win ? win.getComputedStyle(cur) : getComputedStyle(cur)).fontSize;
chain.push(fs || '');
cur = cur.parentElement;
}
// Walk root → leaf, resolving each value relative to its parent context.
let px = 16; // root default
for (let i = chain.length - 1; i >= 0; i--) {
const v = chain[i];
if (!v || v === 'inherit') continue;
const num = parseFloat(v);
if (isNaN(num)) continue;
if (v.endsWith('px')) px = num;
else if (v.endsWith('rem')) px = num * 16;
else if (v.endsWith('em')) px = num * px;
else if (v.endsWith('%')) px = (num / 100) * px;
else px = num; // unitless — already resolved
}
return px;
}
// Resolve a CSS length value (line-height, letter-spacing, etc.) given a
// known font-size context. Returns null for "normal" / unparseable values.
function resolveLengthPx(value, fontSizePx) {
if (!value || value === 'normal' || value === 'auto' || value === 'inherit') return null;
const num = parseFloat(value);
if (isNaN(num)) return null;
if (value.endsWith('px')) return num;
if (value.endsWith('rem')) return num * 16;
if (value.endsWith('em')) return num * fontSizePx;
if (value.endsWith('%')) return (num / 100) * fontSizePx;
// Unitless line-height = multiplier, return px equivalent
return num * fontSizePx;
}
// Pure quality checks. Most run on computed CSS and DOM-only inputs (work in
// jsdom and the browser). Two checks (line-length, cramped-padding) gate on
// element rect dimensions, which jsdom can't compute — pass `rect: null` from
// the Node adapter to skip those.
//
// Both adapters resolve font-size, line-height and letter-spacing to pixels
// before calling this so the pure function only deals with numbers.
function checkQuality(opts) {
const { el, tag, style, hasDirectText, textLen, fontSize, lineHeightPx, letterSpacingPx, rect, lineMax = 80, viewportWidth = 0, win = null } = opts;
const findings = [];
// Skip browser extension injected elements
const elId = el.id || '';
if (elId.startsWith('claude-') || elId.startsWith('cic-')) return findings;
// --- Line length too long --- (browser-only: needs rect.width)
if (rect && hasDirectText && QUALITY_TEXT_TAGS.has(tag) && rect.width > 0 && textLen > lineMax) {
const charsPerLine = rect.width / (fontSize * 0.5);
if (charsPerLine > lineMax + 5) {
findings.push({ id: 'line-length', snippet: `~${Math.round(charsPerLine)} chars/line (aim for <${lineMax})` });
}
}
// --- Cramped padding --- (browser-only: needs rect to skip small badges/labels)
// Vertical and horizontal thresholds are independent because line-height
// already provides built-in vertical breathing room (the line box is taller
// than the cap height), but horizontal has no equivalent. Both scale with
// font-size — bigger text demands proportionally more padding.
// vertical: max(4px, fontSize × 0.3)
// horizontal: max(8px, fontSize × 0.5)
if (rect && hasDirectText && textLen > 20 && rect.width > 100 && rect.height > 30) {
const borders = {
top: parseFloat(style.borderTopWidth) || 0,
right: parseFloat(style.borderRightWidth) || 0,
bottom: parseFloat(style.borderBottomWidth) || 0,
left: parseFloat(style.borderLeftWidth) || 0,
};
const borderCount = Object.values(borders).filter(w => w > 0).length;
const hasBg = style.backgroundColor && style.backgroundColor !== 'rgba(0, 0, 0, 0)';
if (borderCount >= 2 || hasBg) {
const vPads = [], hPads = [];
if (hasBg || borders.top > 0) vPads.push(parseFloat(style.paddingTop) || 0);
if (hasBg || borders.bottom > 0) vPads.push(parseFloat(style.paddingBottom) || 0);
if (hasBg || borders.left > 0) hPads.push(parseFloat(style.paddingLeft) || 0);
if (hasBg || borders.right > 0) hPads.push(parseFloat(style.paddingRight) || 0);
const vMin = vPads.length ? Math.min(...vPads) : Infinity;
const hMin = hPads.length ? Math.min(...hPads) : Infinity;
const vThresh = Math.max(4, fontSize * 0.3);
const hThresh = Math.max(8, fontSize * 0.5);
// Emit at most one finding per element — pick whichever axis is worse.
if (vMin < vThresh) {
findings.push({ id: 'cramped-padding', snippet: `${vMin}px vertical padding (need ≥${vThresh.toFixed(1)}px for ${fontSize}px text)` });
} else if (hMin < hThresh) {
findings.push({ id: 'cramped-padding', snippet: `${hMin}px horizontal padding (need ≥${hThresh.toFixed(1)}px for ${fontSize}px text)` });
}
}
}
// --- Flush against a visible boundary ---
// Fires when a container has a visible boundary (border, outline, OR a
// non-transparent background) AND near-zero padding on the bounded
// side(s) AND text-bearing children land flush against the boundary.
//
// Distinct from cramped-padding: that rule needs the element itself to
// have direct text (hasDirectText). This rule targets the OPPOSITE
// shape — a container with NO direct text, only children — which is
// exactly what cramped-padding misses (a section wrapping a label +
// list lands a free pass).
//
// The classic shape: agent writes `padding: 28px 0 0` shorthand on a
// section that also has a border, zeroing horizontal padding so the
// text-bearing children touch the side borders. Background and
// outline count too: a colored card with zero padding has the same
// visual failure mode.
{
const FLUSH_SKIP_TAGS = new Set(['HTML', 'BODY', 'MAIN', 'HEADER', 'FOOTER', 'NAV', 'ARTICLE', 'ASIDE', 'BUTTON', 'A', 'LABEL', 'SUMMARY', 'CODE', 'PRE', 'INPUT', 'TEXTAREA', 'SELECT', 'FORM', 'FIGURE', 'TABLE', 'TBODY', 'THEAD', 'TR', 'TD', 'TH']);
const upperTag = tag ? tag.toUpperCase() : '';
const elPosition = style.position || '';
if (
!FLUSH_SKIP_TAGS.has(upperTag) &&
!hasDirectText &&
!['fixed', 'absolute'].includes(elPosition) &&
el.children && el.children.length > 0
) {
const isTransparent = (c) =>
!c || c === 'transparent' || c === 'rgba(0, 0, 0, 0)' ||
/^rgba\(\s*\d+\s*,\s*\d+\s*,\s*\d+\s*,\s*0(?:\.0+)?\s*\)$/.test(c);
const borderW = {
top: parseFloat(style.borderTopWidth) || 0,
right: parseFloat(style.borderRightWidth) || 0,
bottom: parseFloat(style.borderBottomWidth) || 0,
left: parseFloat(style.borderLeftWidth) || 0,
};
const borderVisible = {
top: borderW.top > 0 && !isTransparent(style.borderTopColor),
right: borderW.right > 0 && !isTransparent(style.borderRightColor),
bottom: borderW.bottom > 0 && !isTransparent(style.borderBottomColor),
left: borderW.left > 0 && !isTransparent(style.borderLeftColor),
};
// Outline detection. jsdom decomposes `border` shorthand into
// border{Top,…}Width/Color but does NOT decompose `outline` —
// the longhands come back empty when the value was set via the
// shorthand. Fall back to parsing `style.outline` ourselves.
let outlineW = parseFloat(style.outlineWidth) || 0;
let outlineStyleVal = style.outlineStyle || '';
let outlineColorVal = style.outlineColor || '';
if (!outlineW && style.outline) {
const wMatch = style.outline.match(/(\d+(?:\.\d+)?)\s*px/);
if (wMatch) outlineW = parseFloat(wMatch[1]) || 0;
if (!outlineStyleVal) {
outlineStyleVal = /\b(solid|dashed|dotted|double|groove|ridge|inset|outset)\b/.test(style.outline) ? 'solid' : '';
}
if (!outlineColorVal) {
const cMatch = style.outline.match(/(rgba?\([^)]+\)|#[0-9a-fA-F]{3,8}|[a-zA-Z]+)\s*$/);
if (cMatch) outlineColorVal = cMatch[1];
}
}
const outlineVisible = outlineW > 0 && !isTransparent(outlineColorVal) && outlineStyleVal && outlineStyleVal !== 'none';
const bgVisible = !isTransparent(style.backgroundColor);
const anyVisible = borderVisible.top || borderVisible.right || borderVisible.bottom || borderVisible.left || outlineVisible || bgVisible;
if (anyVisible) {
// Resolve padding to px (jsdom returns raw "1.5rem" etc., not the
// computed px value; parseFloat would strip the unit and treat
// 1.5rem as 1.5px, false-flagging legitimate insets).
const pad = {
top: resolveLengthPx(style.paddingTop, fontSize) ?? 0,
right: resolveLengthPx(style.paddingRight, fontSize) ?? 0,
bottom: resolveLengthPx(style.paddingBottom, fontSize) ?? 0,
left: resolveLengthPx(style.paddingLeft, fontSize) ?? 0,
};
const PAD_THRESHOLD = 2;
// Children-insulate-this-side: a side is insulated if ANY direct
// child has its own padding ≥ 4px on that side. Rationale: in
// typical flow, only the first/last (or leftmost/rightmost)
// children actually sit at the parent's edges. If even one of
// them has its own padding, the visual flush is broken on that
// side. Classic example: a column-flow card frame where the
// top child (header) has padding-top:12 and the bottom child
// (footer) has padding-bottom:8 — the parent's padding:0 doesn't
// matter; nothing is actually flush. The `any-child-insulates`
// heuristic accepts some false negatives (a card with one heavily
// padded middle child won't flag) for far fewer false positives.
const CHILD_INSULATE_THRESHOLD = 4;
const childrenInsulate = { top: false, right: false, bottom: false, left: false };
for (const child of el.children) {
let childStyle = null;
if (win && typeof win.getComputedStyle === 'function') {
try { childStyle = win.getComputedStyle(child); } catch {}
}
if (!childStyle && typeof getComputedStyle === 'function') {
try { childStyle = getComputedStyle(child); } catch {}
}
if (!childStyle) continue;
const childPad = {
top: resolveLengthPx(childStyle.paddingTop, fontSize) ?? 0,
right: resolveLengthPx(childStyle.paddingRight, fontSize) ?? 0,
bottom: resolveLengthPx(childStyle.paddingBottom, fontSize) ?? 0,
left: resolveLengthPx(childStyle.paddingLeft, fontSize) ?? 0,
};
for (const s of ['top', 'right', 'bottom', 'left']) {
if (childPad[s] >= CHILD_INSULATE_THRESHOLD) childrenInsulate[s] = true;
}
}
const flushSides = [];
for (const side of ['top', 'right', 'bottom', 'left']) {
const sideBounded = borderVisible[side] || outlineVisible || bgVisible;
if (sideBounded && pad[side] <= PAD_THRESHOLD && !childrenInsulate[side]) {
flushSides.push(side);
}
}
if (flushSides.length > 0) {
// Confirm at least one direct child has substantial text content
// (> 4 chars). Without this, the flush is harmless: e.g. an
// image-only card.
let hasTextChild = false;
for (const child of el.children) {
const childText = (child.textContent || '').trim();
if (childText.length > 4) { hasTextChild = true; break; }
}
if (hasTextChild) {
const cls = (typeof el.className === 'string' && el.className.trim())
? el.className.trim().split(/\s+/)[0]
: '';
const boundaryParts = [];
const borderSidesVisible = ['top', 'right', 'bottom', 'left'].filter(s => borderVisible[s]);
if (borderSidesVisible.length === 4) boundaryParts.push('border');
else if (borderSidesVisible.length > 0) boundaryParts.push(`border-${borderSidesVisible.join('/')}`);
if (outlineVisible) boundaryParts.push('outline');
if (bgVisible) boundaryParts.push('bg');
const sidesLabel = flushSides.length === 4 ? 'all sides' : flushSides.join('/');
const ident = cls
? `<${tag.toLowerCase()}> "${cls}"`
: `<${tag.toLowerCase()}>`;
findings.push({
id: 'cramped-padding',
snippet: `${ident}: children flush against ${boundaryParts.join('+')} on ${sidesLabel} (no inset)`,
});
}
}
}
}
}
// --- Body text touching viewport edge --- (browser-only: needs rect)
// Catches the failure mode where the agent ships body paragraphs
// with NO container providing horizontal padding — text bleeds
// directly to the viewport edge. Different from cramped-padding,
// which requires a colored/bordered container. Here the failure
// is the absence of the container entirely.
//
// Gate aggressively to avoid false positives:
// - <p> or <li> only (body content; not headings, not nav, not
// wrappers)
// - text > 40 chars (paragraph-like, not a label)
// - rect.width > 50% of viewport (real body, not a pull-quote)
// - rect.left < 16 OR rect.right > viewport - 16 (actually
// touching the edge)
// - not inside <nav> or <header> (those legitimately bleed)
// - element itself has no background-color (intentional full-bleed
// sections set a bg-color and provide their own internal padding)
if (rect && hasDirectText && textLen > 40 && ['P', 'LI'].includes(tag.toUpperCase()) && viewportWidth > 0) {
const inNavHeader = el.closest && (el.closest('nav') || el.closest('header'));
const hasOwnBg = style.backgroundColor && style.backgroundColor !== 'rgba(0, 0, 0, 0)' && style.backgroundColor !== 'transparent';
const isPositioned = ['fixed', 'absolute'].includes(style.position || '');
const widthRatio = rect.width / viewportWidth;
const leftClose = rect.left < 16;
const rightClose = rect.right > viewportWidth - 16;
if (!inNavHeader && !hasOwnBg && !isPositioned && widthRatio > 0.5 && (leftClose || rightClose)) {
const which = leftClose && rightClose
? `left ${Math.round(rect.left)}px / right ${Math.round(viewportWidth - rect.right)}px`
: leftClose
? `left ${Math.round(rect.left)}px`
: `right ${Math.round(viewportWidth - rect.right)}px`;
findings.push({ id: 'body-text-viewport-edge', snippet: `<${tag.toLowerCase()}> with ${textLen}-char body bleeds to viewport edge (${which})` });
}
}
// --- Tight line height ---
if (hasDirectText && textLen > 50 && !['h1','h2','h3','h4','h5','h6'].includes(tag)) {
if (lineHeightPx != null && fontSize > 0) {
const ratio = lineHeightPx / fontSize;
if (ratio > 0 && ratio < 1.3) {
findings.push({ id: 'tight-leading', snippet: `line-height ${ratio.toFixed(2)}x (need >=1.3)` });
}
}
}
// --- Justified text (without hyphens) ---
if (hasDirectText && style.textAlign === 'justify') {
const hyphens = style.hyphens || style.webkitHyphens || '';
if (hyphens !== 'auto') {
findings.push({ id: 'justified-text', snippet: 'text-align: justify without hyphens: auto' });
}
}
// --- Tiny body text ---
// Only flag actual body content, not UI labels (buttons, tabs, badges, captions, footer text, etc.)
if (hasDirectText && textLen > 20 && fontSize < 12) {
const skipTags = ['sub', 'sup', 'code', 'kbd', 'samp', 'var', 'caption', 'figcaption'];
const inUIContext = el.closest && el.closest('button, a, label, summary, [role="button"], [role="link"], [role="tab"], [role="menuitem"], [role="option"], nav, footer, [class*="badge" i], [class*="chip" i], [class*="pill" i], [class*="tag" i], [class*="label" i], [class*="caption" i]');
const isUppercase = style.textTransform === 'uppercase';
if (!skipTags.includes(tag) && !inUIContext && !isUppercase) {
findings.push({ id: 'tiny-text', snippet: `${fontSize}px body text` });
}
}
// --- All-caps body text ---
if (hasDirectText && textLen > 30 && style.textTransform === 'uppercase') {
if (!['h1','h2','h3','h4','h5','h6'].includes(tag)) {
findings.push({ id: 'all-caps-body', snippet: `text-transform: uppercase on ${textLen} chars of body text` });
}
}
// --- Wide letter spacing on body text ---
if (hasDirectText && textLen > 20 && style.textTransform !== 'uppercase') {
if (letterSpacingPx != null && letterSpacingPx > 0 && fontSize > 0) {
const trackingEm = letterSpacingPx / fontSize;
if (trackingEm > 0.05) {
findings.push({ id: 'wide-tracking', snippet: `letter-spacing: ${trackingEm.toFixed(2)}em on body text` });
}
}
}
// --- Crushed letter spacing (mirror of wide-tracking) ---
// Tracking pulled tighter than ~-0.05em crushes characters into each other.
// Optical tightening that display type legitimately wants (around -0.02em)
// stays well above this floor.
if (hasDirectText && textLen > 20 && fontSize > 0) {
if (letterSpacingPx != null && letterSpacingPx < 0) {
const trackingEm = letterSpacingPx / fontSize;
if (trackingEm <= -0.05) {
const excerpt = (el.textContent || '').trim().replace(/\s+/g, ' ').slice(0, 40);
findings.push({ id: 'extreme-negative-tracking', snippet: `letter-spacing: ${trackingEm.toFixed(2)}em — "${excerpt}"` });
}
}
}
return findings;
}
function checkElementQualityDOM(el) {
const tag = el.tagName.toLowerCase();
const style = getComputedStyle(el);
const hasDirectText = [...el.childNodes].some(n => n.nodeType === 3 && n.textContent.trim().length > 10);
const textLen = el.textContent?.trim().length || 0;
// Browser getComputedStyle resolves everything to px — direct parseFloat
// works.
const fontSize = parseFloat(style.fontSize) || 16;
const lineHeightPx = resolveLengthPx(style.lineHeight, fontSize);
const letterSpacingPx = resolveLengthPx(style.letterSpacing, fontSize);
const rect = el.getBoundingClientRect();
const lineMax = (typeof window !== 'undefined' && window.__IMPECCABLE_CONFIG__?.lineLengthMax) || 80;
const viewportWidth = (typeof window !== 'undefined' ? window.innerWidth : 0) || 0;
return checkQuality({ el, tag, style, hasDirectText, textLen, fontSize, lineHeightPx, letterSpacingPx, rect, lineMax, viewportWidth, win: typeof window !== 'undefined' ? window : null });
}
// Pure page-level skipped-heading walk. Takes a Document so it works in both
// the browser and jsdom.
function checkPageQualityFromDoc(doc) {
const findings = [];
const headings = doc.querySelectorAll('h1, h2, h3, h4, h5, h6');
let prevLevel = 0;
let prevText = '';
for (const h of headings) {
const level = parseInt(h.tagName[1]);
const text = (h.textContent || '').trim().replace(/\s+/g, ' ').slice(0, 60);
if (prevLevel > 0 && level > prevLevel + 1) {
findings.push({
id: 'skipped-heading',
snippet: `<h${prevLevel}> "${prevText}" followed by <h${level}> "${text}" (missing h${prevLevel + 1})`,
});
}
prevLevel = level;
prevText = text;
}
return findings;
}
// Browser adapter (returns the legacy { type, detail } shape used by the overlay loop)
function checkPageQualityDOM() {
return checkPageQualityFromDoc(document).map(f => ({ type: f.id, detail: f.snippet }));
}
// Node adapters — take pre-extracted jsdom computed style
// jsdom doesn't lay out OR resolve em/rem/% to px — so we pre-resolve every
// CSS length the rule needs ourselves (walking the parent chain for
// font-size inheritance), and pass `rect: null` to skip the two rules that
// genuinely need element rects (line-length, cramped-padding).
function checkElementQuality(el, style, tag, window) {
const hasDirectText = [...el.childNodes].some(n => n.nodeType === 3 && n.textContent.trim().length > 10);
const textLen = el.textContent?.trim().length || 0;
const fontSize = resolveFontSizePx(el, window);
const lineHeightPx = resolveLengthPx(style.lineHeight, fontSize);
const letterSpacingPx = resolveLengthPx(style.letterSpacing, fontSize);
return checkQuality({ el, tag, style, hasDirectText, textLen, fontSize, lineHeightPx, letterSpacingPx, rect: null, win: window });
}
function checkElementBorders(tag, style, overrides, resolvedRadius) {
const sides = ['Top', 'Right', 'Bottom', 'Left'];
const widths = {}, colors = {};
for (const s of sides) {
widths[s] = parseFloat(style[`border${s}Width`]) || 0;
colors[s] = style[`border${s}Color`] || '';
// jsdom silently drops any border shorthand containing var(), leaving
// both width and color empty on the computed style. When the detectHtml
// pre-pass pulled a resolved value off the rule, use it to fill in the
// missing side so the side-tab check can run. Real browsers resolve
// var() natively, so this fallback is a no-op in the browser path.
if (widths[s] === 0 && overrides && overrides[s]) {
widths[s] = overrides[s].width;
colors[s] = overrides[s].color;
} else if (colors[s] && colors[s].startsWith('var(') && overrides && overrides[s]) {
// Longhand case: jsdom kept the width but left the color as the
// literal `var(...)` string. Substitute the resolved color.
colors[s] = overrides[s].color;
}
}
// resolvedRadius lets the caller pre-resolve the radius via
// resolveBorderRadiusPx so the value survives jsdom 29.1.0's broken
// shorthand serialization. Falls back to the computed value for tests
// and browser callers that don't pre-resolve.
const radius = resolvedRadius != null
? resolvedRadius
: (parseFloat(style.borderRadius) || 0);
return checkBorders(tag, widths, colors, radius);
}
function checkElementColors(el, style, tag, window, customPropMap, hasAnchorInheritRule) {
const directText = [...el.childNodes].filter(n => n.nodeType === 3).map(n => n.textContent).join('');
const hasDirectText = directText.trim().length > 0;
const effectiveBg = resolveBackground(el, window, customPropMap);
// jsdom returns literal "var(--X)" / "oklch(...)" for color, so plain
// parseRgb misses Tailwind-tokenized text colors. Resolve through the
// customPropMap first; fall back to parseRgb for vanilla rgb() pages.
let textColor = customPropMap ? parseColorResolved(style.color, customPropMap) : null;
if (!textColor) textColor = parseRgb(style.color);
// Anchor-inherit FP workaround: jsdom's UA stylesheet has `:link { color:
// blue }` at high specificity. The page's `a { color: inherit }` rule
// (Tailwind v4 preflight) loses to jsdom even though it WINS in real
// browsers (Chrome's UA wraps :link in :where() — zero specificity).
// When the page declares the inherit rule AND we see jsdom's default
// link blue on an anchor, walk to the nearest non-anchor ancestor and
// use its color instead.
if (
hasAnchorInheritRule &&
textColor &&
textColor.r === 0 && textColor.g === 0 && textColor.b === 238 &&
(tag === 'a' || el.closest?.('a'))
) {
let cur = el.parentElement;
while (cur && cur.tagName !== 'HTML') {
if (cur.tagName !== 'A') {
const ps = window.getComputedStyle(cur);
const inh = (customPropMap ? parseColorResolved(ps.color, customPropMap) : null) || parseRgb(ps.color);
if (inh && !(inh.r === 0 && inh.g === 0 && inh.b === 238)) {
textColor = inh;
break;
}
}
cur = cur.parentElement;
}
}
return checkColors({
tag,
textColor,
bgColor: readOwnBackgroundColor(el, style),
effectiveBg,
effectiveBgStops: effectiveBg ? null : resolveGradientStops(el, window),
fontSize: parseFloat(style.fontSize) || 16,
fontWeight: parseInt(style.fontWeight) || 400,
hasDirectText,
isEmojiOnly: isEmojiOnlyText(directText),
bgClip: style.webkitBackgroundClip || style.backgroundClip || '',
bgImage: style.backgroundImage || '',
classList: el.getAttribute?.('class') || el.className || '',
});
}
function checkElementIconTile(el, tag, window) {
if (!HEADING_TAGS.has(tag)) return [];
const sibling = el.previousElementSibling;
if (!sibling) return [];
const sibStyle = window.getComputedStyle(sibling);
// jsdom doesn't lay out — read explicit pixel dimensions from CSS instead.
const sibWidth = parseFloat(sibStyle.width) || 0;
const sibHeight = parseFloat(sibStyle.height) || 0;
const iconChild = sibling.querySelector('svg, i[data-lucide], i[class*="fa-"], i[class*="icon"]');
let iconWidth = 0;
if (iconChild) {
const iconStyle = window.getComputedStyle(iconChild);
iconWidth = parseFloat(iconStyle.width) || parseFloat(iconChild.getAttribute('width')) || 0;
}
// Or: tile contains an emoji/symbol character directly as its only content
const sibDirectText = [...sibling.childNodes].filter(n => n.nodeType === 3).map(n => n.textContent).join('');
const hasInlineEmojiIcon = sibling.children.length === 0 && isEmojiOnlyText(sibDirectText);
return checkIconTile({
headingTag: tag,
headingText: el.textContent || '',
headingTop: 0, // jsdom: no layout, skip vertical-stacking gate
siblingTag: sibling.tagName.toLowerCase(),
siblingWidth: sibWidth,
siblingHeight: sibHeight,
siblingBottom: 0,
siblingBgColor: parseRgb(sibStyle.backgroundColor),
siblingBgImage: sibStyle.backgroundImage || '',
siblingBorderWidth: parseFloat(sibStyle.borderTopWidth) || 0,
siblingBorderRadius: resolveBorderRadiusPx(sibling, sibStyle, sibWidth, window),
hasIconChild: !!iconChild || hasInlineEmojiIcon,
iconChildWidth: iconWidth,
});
}
function checkElementItalicSerif(el, style, tag) {
if (tag !== 'h1' && tag !== 'h2') return [];
return checkItalicSerif({
tag,
fontStyle: style.fontStyle || '',
fontFamily: style.fontFamily || '',
fontSize: parseFloat(style.fontSize) || 0,
headingText: el.textContent || '',
});
}
function checkElementHeroEyebrow(el, style, tag, window, customPropMap) {
if (tag !== 'h1') return [];
const sibling = el.previousElementSibling;
if (!sibling) return [];
const sibStyle = window.getComputedStyle(sibling);
// Resolve Tailwind v4 CSS-variable wrappers (font-weight:var(--font-weight-bold)
// etc.) before parsing. jsdom returns these verbatim from getComputedStyle;
// without resolution every style-based gate fails silently on Tailwind v4 builds.
const fontSizeRaw = customPropMap ? resolveVarRefs(sibStyle.fontSize, customPropMap) : sibStyle.fontSize;
const fontWeightRaw = customPropMap ? resolveVarRefs(sibStyle.fontWeight, customPropMap) : sibStyle.fontWeight;
const letterSpacingRaw = customPropMap ? resolveVarRefs(sibStyle.letterSpacing, customPropMap) : sibStyle.letterSpacing;
const colorRaw = customPropMap ? resolveVarRefs(sibStyle.color, customPropMap) : sibStyle.color;
const headingFontSizeRaw = customPropMap ? resolveVarRefs(style.fontSize, customPropMap) : style.fontSize;
const siblingFontSize = parseFloat(fontSizeRaw) || 0;
// resolveLengthPx returns null for 'normal' / 'auto'; coerce to 0 so the
// gate falls through cleanly. jsdom returns letter-spacing verbatim
// (e.g. '0.15em'), unlike real browsers, so this conversion is required.
return checkHeroEyebrow({
headingTag: tag,
headingText: el.textContent || '',
headingFontSize: parseFloat(headingFontSizeRaw) || 0,
siblingTag: sibling.tagName.toLowerCase(),
siblingText: sibling.textContent || '',
siblingTextTransform: sibStyle.textTransform || '',
siblingFontSize,
siblingLetterSpacing: resolveLengthPx(letterSpacingRaw, siblingFontSize) || 0,
siblingFontWeight: fontWeightRaw || '',
siblingColor: colorRaw || '',
});
}
function checkRepeatedSectionKickersFromDoc(doc, win) {
const candidates = collectRepeatedSectionKickerCandidates(
doc,
(el) => win.getComputedStyle(el),
(value, fontSize) => resolveLengthPx(value, fontSize) || 0,
);
return checkRepeatedSectionKickers({ candidates });
}
function checkElementMotion(tag, style) {
return checkMotion({
tag,
transitionProperty: style.transitionProperty || '',
animationName: style.animationName || '',
timingFunctions: [style.animationTimingFunction, style.transitionTimingFunction].filter(Boolean).join(' '),
classList: '',
});
}
function checkElementGlow(tag, style, effectiveBg) {
if (!style.boxShadow || style.boxShadow === 'none') return [];
return checkGlow({ tag, boxShadow: style.boxShadow, effectiveBg });
}
// ─── Section 6: Page-Level Checks ───────────────────────────────────────────
// Browser page-level checks — use document/getComputedStyle globals
function checkTypography() {
const findings = [];
// Walk actual text-bearing elements and tally font usage by *computed style*.
// This is much more accurate than scanning CSS rules — it ignores rules that
// exist in the stylesheet but apply to nothing (e.g. demo classes showing
// anti-patterns), and counts what the user actually sees.
const fontUsage = new Map(); // primary font name → count of elements
let totalTextElements = 0;
for (const el of document.querySelectorAll('p, h1, h2, h3, h4, h5, h6, li, td, th, dd, blockquote, figcaption, a, button, label, span')) {
// Skip impeccable's own elements
if (el.closest && el.closest('.impeccable-overlay, .impeccable-label, .impeccable-banner, .impeccable-tooltip')) continue;
// Only count elements that actually have visible direct text
const hasText = [...el.childNodes].some(n => n.nodeType === 3 && n.textContent.trim().length > 0);
if (!hasText) continue;
const style = getComputedStyle(el);
const ff = style.fontFamily;
if (!ff) continue;
const stack = ff.split(',').map(f => f.trim().replace(/^['"]|['"]$/g, '').toLowerCase());
const primary = stack.find(f => f && !GENERIC_FONTS.has(f));
if (!primary) continue;
fontUsage.set(primary, (fontUsage.get(primary) || 0) + 1);
totalTextElements++;
}
if (totalTextElements >= 20) {
// A font is "primary" if it's used by at least 15% of text elements
const PRIMARY_THRESHOLD = 0.15;
for (const [font, count] of fontUsage) {
const share = count / totalTextElements;
if (share < PRIMARY_THRESHOLD) continue;
if (!OVERUSED_FONTS.has(font)) continue;
if (isBrandFontOnOwnDomain(font)) continue;
findings.push({ type: 'overused-font', detail: `Primary font: ${font} (${Math.round(share * 100)}% of text)` });
}
// Single-font check: only one distinct primary font across all text
if (fontUsage.size === 1) {
const only = [...fontUsage.keys()][0];
findings.push({ type: 'single-font', detail: `only font used is ${only}` });
}
}
const sizes = new Set();
for (const el of document.querySelectorAll('h1,h2,h3,h4,h5,h6,p,span,a,li,td,th,label,button,div')) {
const fs = parseFloat(getComputedStyle(el).fontSize);
if (fs > 0 && fs < 200) sizes.add(Math.round(fs * 10) / 10);
}
if (sizes.size >= 3) {
const sorted = [...sizes].sort((a, b) => a - b);
const ratio = sorted[sorted.length - 1] / sorted[0];
if (ratio < 2.0) {
findings.push({ type: 'flat-type-hierarchy', detail: `Sizes: ${sorted.map(s => s + 'px').join(', ')} (ratio ${ratio.toFixed(1)}:1)` });
}
}
return findings;
}
function isCardLikeDOM(el) {
const tag = el.tagName.toLowerCase();
if (SAFE_TAGS.has(tag) || ['input','select','textarea','img','video','canvas','picture'].includes(tag)) return false;
const style = getComputedStyle(el);
const cls = el.getAttribute('class') || '';
const hasShadow = (style.boxShadow && style.boxShadow !== 'none') || /\bshadow(?:-sm|-md|-lg|-xl|-2xl)?\b/.test(cls);
const hasBorder = /\bborder\b/.test(cls);
const hasRadius = parseFloat(style.borderRadius) > 0 || /\brounded(?:-sm|-md|-lg|-xl|-2xl|-full)?\b/.test(cls);
const hasBg = (style.backgroundColor && style.backgroundColor !== 'rgba(0, 0, 0, 0)') || /\bbg-(?:white|gray-\d+|slate-\d+)\b/.test(cls);
return isCardLikeFromProps(hasShadow, hasBorder, hasRadius, hasBg);
}
function checkLayout() {
const findings = [];
const flaggedEls = new Set();
for (const el of document.querySelectorAll('*')) {
if (!isCardLikeDOM(el) || flaggedEls.has(el)) continue;
const cls = el.getAttribute('class') || '';
const style = getComputedStyle(el);
if (style.position === 'absolute' || style.position === 'fixed') continue;
if (/\b(?:dropdown|popover|tooltip|menu|modal|dialog)\b/i.test(cls)) continue;
if ((el.textContent?.trim().length || 0) < 10) continue;
const rect = el.getBoundingClientRect();
if (rect.width < 50 || rect.height < 30) continue;
let parent = el.parentElement;
while (parent) {
if (isCardLikeDOM(parent)) { flaggedEls.add(el); break; }
parent = parent.parentElement;
}
}
for (const el of flaggedEls) {
let isAncestor = false;
for (const other of flaggedEls) {
if (other !== el && el.contains(other)) { isAncestor = true; break; }
}
if (!isAncestor) findings.push({ type: 'nested-cards', detail: 'Card inside card', el });
}
return findings;
}
// Node page-level checks — take document/window as parameters
function checkPageTypography(doc, win) {
const findings = [];
const fonts = new Set();
const overusedFound = new Set();
for (const sheet of doc.styleSheets) {
let rules;
try { rules = sheet.cssRules || sheet.rules; } catch { continue; }
if (!rules) continue;
for (const rule of rules) {
if (rule.type !== 1) continue;
const ff = rule.style?.fontFamily;
if (!ff) continue;
const stack = ff.split(',').map(f => f.trim().replace(/^['"]|['"]$/g, '').toLowerCase());
const primary = stack.find(f => f && !GENERIC_FONTS.has(f));
if (primary) {
fonts.add(primary);
if (OVERUSED_FONTS.has(primary)) overusedFound.add(primary);
}
}
}
// Check Google Fonts links in HTML
const html = doc.documentElement?.outerHTML || '';
const gfRe = /fonts\.googleapis\.com\/css2?\?family=([^&"'\s]+)/gi;
let m;
while ((m = gfRe.exec(html)) !== null) {
const families = m[1].split('|').map(f => f.split(':')[0].replace(/\+/g, ' ').toLowerCase());
for (const f of families) {
fonts.add(f);
if (OVERUSED_FONTS.has(f)) overusedFound.add(f);
}
}
// Also parse raw HTML/style content for font-family (jsdom may not expose all via CSSOM)
const ffRe = /font-family\s*:\s*([^;}]+)/gi;
let fm;
while ((fm = ffRe.exec(html)) !== null) {
for (const f of fm[1].split(',').map(f => f.trim().replace(/^['"]|['"]$/g, '').toLowerCase())) {
if (f && !GENERIC_FONTS.has(f)) {
fonts.add(f);
if (OVERUSED_FONTS.has(f)) overusedFound.add(f);
}
}
}
for (const font of overusedFound) {
findings.push({ id: 'overused-font', snippet: `Primary font: ${font}` });
}
// Single font
if (fonts.size === 1) {
const els = doc.querySelectorAll('*');
if (els.length >= 20) {
findings.push({ id: 'single-font', snippet: `only font used is ${[...fonts][0]}` });
}
}
// Flat type hierarchy
const sizes = new Set();
const textEls = doc.querySelectorAll('h1, h2, h3, h4, h5, h6, p, span, a, li, td, th, label, button, div');
for (const el of textEls) {
const fontSize = parseFloat(win.getComputedStyle(el).fontSize);
// Filter out sub-8px values (jsdom doesn't resolve relative units properly)
if (fontSize >= 8 && fontSize < 200) sizes.add(Math.round(fontSize * 10) / 10);
}
if (sizes.size >= 3) {
const sorted = [...sizes].sort((a, b) => a - b);
const ratio = sorted[sorted.length - 1] / sorted[0];
if (ratio < 2.0) {
findings.push({ id: 'flat-type-hierarchy', snippet: `Sizes: ${sorted.map(s => s + 'px').join(', ')} (ratio ${ratio.toFixed(1)}:1)` });
}
}
return findings;
}
function isCardLike(el, win) {
const tag = el.tagName.toLowerCase();
if (SAFE_TAGS.has(tag) || ['input', 'select', 'textarea', 'img', 'video', 'canvas', 'picture'].includes(tag)) return false;
const style = win.getComputedStyle(el);
const rawStyle = el.getAttribute?.('style') || '';
const cls = el.getAttribute?.('class') || '';
const hasShadow = (style.boxShadow && style.boxShadow !== 'none') ||
/\bshadow(?:-sm|-md|-lg|-xl|-2xl)?\b/.test(cls) || /box-shadow/i.test(rawStyle);
const hasBorder = /\bborder\b/.test(cls);
const widthPx = parseFloat(style.width) || 0;
const hasRadius = resolveBorderRadiusPx(el, style, widthPx, win) > 0 ||
/\brounded(?:-sm|-md|-lg|-xl|-2xl|-full)?\b/.test(cls) || /border-radius/i.test(rawStyle);
const hasBg = /\bbg-(?:white|gray-\d+|slate-\d+)\b/.test(cls) ||
/background(?:-color)?\s*:\s*(?!transparent)/i.test(rawStyle);
return isCardLikeFromProps(hasShadow, hasBorder, hasRadius, hasBg);
}
function checkPageLayout(doc, win) {
const findings = [];
// Nested cards
const allEls = doc.querySelectorAll('*');
const flaggedEls = new Set();
for (const el of allEls) {
if (!isCardLike(el, win)) continue;
if (flaggedEls.has(el)) continue;
const tag = el.tagName.toLowerCase();
const cls = el.getAttribute?.('class') || '';
const rawStyle = el.getAttribute?.('style') || '';
if (['pre', 'code'].includes(tag)) continue;
if (/\b(?:absolute|fixed)\b/.test(cls) || /position\s*:\s*(?:absolute|fixed)/i.test(rawStyle)) continue;
if ((el.textContent?.trim().length || 0) < 10) continue;
if (/\b(?:dropdown|popover|tooltip|menu|modal|dialog)\b/i.test(cls)) continue;
// Walk up to find card-like ancestor
let parent = el.parentElement;
while (parent) {
if (isCardLike(parent, win)) {
flaggedEls.add(el);
break;
}
parent = parent.parentElement;
}
}
// Only report innermost nested cards
for (const el of flaggedEls) {
let isAncestorOfFlagged = false;
for (const other of flaggedEls) {
if (other !== el && el.contains(other)) {
isAncestorOfFlagged = true;
break;
}
}
if (!isAncestorOfFlagged) {
findings.push({ id: 'nested-cards', snippet: `Card inside card (${el.tagName.toLowerCase()})` });
}
}
return findings;
}
// ─── Cream / beige palette (the default "tasteful" AI surface) ────────────────
// A warm, lightly-tinted off-white page background — light, with R≥G≥B and a
// small warm tint (not white, not a strong color). The current reflex surface.
function isCreamColor(rgb) {
if (!rgb) return false;
const { r, g, b } = rgb;
if (Math.min(r, g, b) < 209) return false; // must be light
if (!(r >= g && g >= b)) return false; // warm ordering
const warmth = r - b;
return warmth >= 6 && warmth <= 48; // tinted, not white, not strong
}
// Tailwind background utilities that render as a warm off-white surface. The
// static engine doesn't fetch Tailwind's CSS, so a `bg-amber-50` on <body>
// resolves to nothing in computed style — catch it from the class list
// instead. Candidate tokens map to their actual Tailwind hex and are still
// filtered through isCreamColor, so neutral grays (stone) and over-saturated
// shades drop out on their own.
const TAILWIND_BG_HEX = {
'bg-amber-50': '#fffbeb', 'bg-amber-100': '#fef3c7',
'bg-orange-50': '#fff7ed', 'bg-orange-100': '#ffedd5',
'bg-yellow-50': '#fefce8',
'bg-stone-50': '#fafaf9', 'bg-stone-100': '#f5f5f4', 'bg-stone-200': '#e7e5e4',
};
function creamFromClassList(cls) {
if (!cls) return null;
// Arbitrary value: bg-[#f5f0e6] / bg-[rgb(245_240_230)] (underscores = spaces).
const arb = cls.match(/\bbg-\[([^\]]+)\]/);
if (arb && isCreamColor(parseAnyColor(arb[1].replace(/_/g, ' ')))) return `bg-[${arb[1]}]`;
// Named warm-light utilities.
for (const [tok, hex] of Object.entries(TAILWIND_BG_HEX)) {
if (new RegExp(`(^|\\s)${tok}($|\\s)`).test(cls) && isCreamColor(parseAnyColor(hex))) return tok;
}
return null;
}
function checkCreamPalette(doc, win) {
const findings = [];
const body = doc.body || (doc.querySelector ? doc.querySelector('body') : null);
if (!body) return findings;
const html = doc.documentElement;
const getCS = (el) => (win ? win.getComputedStyle(el) : getComputedStyle(el));
// 1. Computed background — covers inline / <style> / linked CSS, and Tailwind
// once it's actually rendered (browser path).
let bg = readOwnBackgroundColor(body, getCS(body));
if (!bg || bg.a === 0) {
if (html) bg = readOwnBackgroundColor(html, getCS(html));
}
if (isCreamColor(bg)) {
findings.push({ id: 'cream-palette', snippet: `cream/beige page background rgb(${bg.r}, ${bg.g}, ${bg.b})` });
return findings;
}
// 2. Tailwind class fallback — for the static path, where utility classes
// never resolve to computed CSS.
for (const el of [body, html]) {
const tok = creamFromClassList(el && el.getAttribute ? el.getAttribute('class') : '');
if (tok) {
findings.push({ id: 'cream-palette', snippet: `cream/beige page background (Tailwind ${tok})` });
break;
}
}
return findings;
}
// ─── Oversized hero headline ────────────────────────────────────────────────
// Fires when a *long* headline is set at display size, so a full sentence ends
// up dominating the viewport. A punchy one- or two-word headline at the same
// size is a legitimate stylistic choice and must pass — length, not size
// alone, is the tell.
const OVERSIZED_H1_FONT_PX = 72;
const OVERSIZED_H1_MIN_CHARS = 40;
function checkOversizedH1({ tag, fontSize, headingText }) {
if (tag !== 'h1') return [];
const textLen = headingText.length;
if (fontSize >= OVERSIZED_H1_FONT_PX && textLen >= OVERSIZED_H1_MIN_CHARS) {
return [{ id: 'oversized-h1', snippet: `${Math.round(fontSize)}px h1, ${textLen} chars "${headingText.slice(0, 60)}"` }];
}
return [];
}
function checkElementOversizedH1(el, style, tag, window) {
if (tag !== 'h1') return [];
const fontSize = resolveFontSizePx(el, window);
const headingText = (el.textContent || '').trim().replace(/\s+/g, ' ');
return checkOversizedH1({ tag, fontSize, headingText });
}
function checkElementOversizedH1DOM(el) {
const tag = el.tagName.toLowerCase();
if (tag !== 'h1') return [];
const style = getComputedStyle(el);
const fontSize = parseFloat(style.fontSize) || 0;
const headingText = (el.textContent || '').trim().replace(/\s+/g, ' ');
return checkOversizedH1({ tag, fontSize, headingText });
}
// ─── GPT tell: hairline border + wide diffuse shadow (gated --gpt) ────────────
function shadowMaxBlurPx(boxShadow) {
if (!boxShadow || boxShadow === 'none') return 0;
let maxBlur = 0;
// Split into layers on commas not inside parentheses (rgba(...) etc.).
for (const layer of boxShadow.split(/,(?![^()]*\))/)) {
// Strip colors and keywords (rgba()/hsl()/hex/named/inset/px), leaving the
// ordered length tokens: offsetX offsetY blur [spread]. Static jsdom keeps
// unitless zeros ("0 0 24px"); browsers normalize to px ("0px 0px 24px") —
// both reduce to the same numbers here.
const cleaned = layer.replace(/rgba?\([^)]*\)|hsla?\([^)]*\)|#[0-9a-f]+|\b[a-z]+\b/gi, ' ');
const nums = [...cleaned.matchAll(/-?\d*\.?\d+/g)].map(m => parseFloat(m[0]));
if (nums.length >= 3) maxBlur = Math.max(maxBlur, nums[2]);
}
return maxBlur;
}
function checkGptThinBorderWideShadow({ borderWidths, boxShadow }) {
const maxBorder = Math.max(0, ...borderWidths);
const hasThinBorder = maxBorder > 0 && maxBorder <= 1.5;
const blur = shadowMaxBlurPx(boxShadow);
if (hasThinBorder && blur >= 16) {
return [{ id: 'gpt-thin-border-wide-shadow', snippet: `${maxBorder}px border + ${Math.round(blur)}px shadow blur` }];
}
return [];
}
function borderWidthsFromStyle(style) {
return [
parseFloat(style.borderTopWidth) || 0,
parseFloat(style.borderRightWidth) || 0,
parseFloat(style.borderBottomWidth) || 0,
parseFloat(style.borderLeftWidth) || 0,
];
}
function checkElementGptBorderShadow(el, style) {
return checkGptThinBorderWideShadow({ borderWidths: borderWidthsFromStyle(style), boxShadow: style.boxShadow || '' });
}
function checkElementGptBorderShadowDOM(el) {
const style = getComputedStyle(el);
return checkGptThinBorderWideShadow({ borderWidths: borderWidthsFromStyle(style), boxShadow: style.boxShadow || '' });
}
// ─── Clipped overflow container ───────────────────────────────────────────────
// A clipping container (overflow hidden/clip, not a scroll region) wrapping an
// absolutely/fixed-positioned descendant clips popovers/menus that must escape.
function classSelector(el) {
const cls = (el.getAttribute ? el.getAttribute('class') : el.className) || '';
const tokens = String(cls).trim().split(/\s+/).filter(Boolean);
const tag = el.tagName ? el.tagName.toLowerCase() : 'el';
return tokens.length ? `${tag}.${tokens.join('.')}` : tag;
}
function checkClippedOverflow(el, style, getStyle) {
const clips = (v) => v === 'hidden' || v === 'clip';
const scrolls = (v) => v === 'auto' || v === 'scroll';
const ox = style.overflowX || '', oy = style.overflowY || '', ov = style.overflow || '';
const anyClip = clips(ox) || clips(oy) || clips(ov);
const anyScroll = scrolls(ox) || scrolls(oy) || scrolls(ov);
if (!anyClip || anyScroll) return [];
if (!el.querySelectorAll) return [];
for (const child of el.querySelectorAll('*')) {
const pos = (getStyle(child).position) || '';
if (pos === 'absolute' || pos === 'fixed') {
return [{ id: 'clipped-overflow-container', snippet: `${classSelector(el)} clips a positioned child` }];
}
}
return [];
}
function checkElementClippedOverflow(el, style, tag, window) {
return checkClippedOverflow(el, style, (n) => window.getComputedStyle(n));
}
function checkElementClippedOverflowDOM(el) {
const style = getComputedStyle(el);
return checkClippedOverflow(el, style, (n) => getComputedStyle(n));
}
// ─── Text overflow (browser-only: needs scrollWidth/clientWidth) ──────────────
const TEXT_OVERFLOW_SKIP_TAGS = new Set(['pre', 'code', 'textarea', 'svg', 'canvas', 'select', 'option', 'marquee']);
function checkElementTextOverflowDOM(el) {
const tag = el.tagName.toLowerCase();
if (TEXT_OVERFLOW_SKIP_TAGS.has(tag)) return [];
// Only the element that actually owns overflowing text — not its ancestors,
// which inherit a wider scrollWidth from the spilling descendant.
const hasDirectText = [...el.childNodes].some(n => n.nodeType === 3 && n.textContent.trim().length > 0);
if (!hasDirectText) return [];
const style = getComputedStyle(el);
const isScrollRegion = (s) => /(auto|scroll)/.test(s.overflowX || '') || /(auto|scroll)/.test(s.overflow || '');
if (isScrollRegion(style)) return [];
// A scrollable ancestor means this overflow is intentional and scrollable.
for (let p = el.parentElement; p; p = p.parentElement) {
if (isScrollRegion(getComputedStyle(p))) return [];
}
const delta = el.scrollWidth - el.clientWidth;
if (el.clientWidth > 0 && delta >= 16) {
return [{ id: 'text-overflow', snippet: `${classSelector(el)} overflows its box by ${Math.round(delta)}px` }];
}
return [];
}
export {
checkBorders,
isEmojiOnlyText,
checkColors,
isCardLikeFromProps,
checkIconTile,
resolveSerif,
checkItalicSerif,
isAccentColor,
checkHeroEyebrow,
checkRepeatedSectionKickers,
checkMotion,
checkGlow,
checkHtmlPatterns,
readOwnBackgroundColor,
resolveBackground,
resolveGradientStops,
parseRadiusToPx,
resolveBorderRadiusPx,
checkElementBordersDOM,
checkElementColorsDOM,
checkElementIconTileDOM,
checkElementItalicSerifDOM,
checkElementHeroEyebrowDOM,
buildCustomPropMap,
resolveVarRefs,
oklchToRgb,
parseAnyColor,
parseColorResolved,
cleanInlineText,
isRepeatedKickerCandidate,
collectRepeatedSectionKickerCandidates,
checkRepeatedSectionKickersDOM,
checkElementMotionDOM,
checkElementGlowDOM,
checkElementAIPaletteDOM,
resolveFontSizePx,
resolveLengthPx,
checkQuality,
checkElementQualityDOM,
checkPageQualityFromDoc,
checkPageQualityDOM,
checkElementQuality,
checkElementBorders,
checkElementColors,
checkElementIconTile,
checkElementItalicSerif,
checkElementHeroEyebrow,
checkRepeatedSectionKickersFromDoc,
checkElementMotion,
checkElementGlow,
checkTypography,
isCardLikeDOM,
checkLayout,
checkPageTypography,
isCardLike,
checkPageLayout,
isCreamColor,
checkCreamPalette,
checkOversizedH1,
checkElementOversizedH1,
checkElementOversizedH1DOM,
shadowMaxBlurPx,
checkGptThinBorderWideShadow,
checkElementGptBorderShadow,
checkElementGptBorderShadowDOM,
checkClippedOverflow,
checkElementClippedOverflow,
checkElementClippedOverflowDOM,
checkElementTextOverflowDOM,
};