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fix(check): resolve color-mix() colors in contrast audit instead of false-failing (#2445)

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This commit is contained in:
Miguel Ángel
2026-07-14 15:51:11 -04:00
committed by GitHub
parent 990f5c3145
commit 6c2513d5c8
2 changed files with 65 additions and 19 deletions
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packages/cli/src/commands/contrast-audit.browser.js
+21 -19
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@@ -58,28 +58,29 @@ window.__contrastAuditPrepare = function () {
}
function parseColor(c) {
var m = c.match(/rgba?\(([^)]+)\)/);
if (!m) return [0, 0, 0, 1];
var p = m[1].split(",").map(function (s) {
return parseFloat(s.trim());
});
return [p[0], p[1], p[2], p[3] != null ? p[3] : 1];
}
// Like parseColor, but returns null instead of defaulting to black when the
// value isn't a solid rgb()/rgba() color — e.g. SVG paint keywords such as
// "none"/"context-fill", or a gradient/pattern reference like
// 'url("#grad")'. Callers should fall back to another source of truth
// rather than trust a fabricated black.
function tryParseSolidColor(c) {
var m = c.match(/rgba?\(([^)]+)\)/);
if (!m) return null;
var m = (c || "").match(/^rgba?\(([^)]+)\)$/i);
if (!m) {
var mix = (c || "").match(
/^color-mix\(\s*in\s+srgb\s*,\s*(rgba?\([^)]+\))\s+(\d+(?:\.\d+)?|\.\d+)%\s*,\s*(rgba?\([^)]+\))\s+(\d+(?:\.\d+)?|\.\d+)%\s*\)$/i,
);
if (!mix) return null;
var first = parseColor(mix[1]);
var second = parseColor(mix[3]);
var firstWeight = parseFloat(mix[2]);
var secondWeight = parseFloat(mix[4]);
var weightTotal = firstWeight + secondWeight;
if (!first || !second || !isFinite(weightTotal) || weightTotal <= 0) return null;
return first.map(function (channel, index) {
return (channel * firstWeight + second[index] * secondWeight) / weightTotal;
});
}
var p = m[1].split(",").map(function (s) {
return parseFloat(s.trim());
});
if (
(p.length !== 3 && p.length !== 4) ||
p.some(function (v) {
return isNaN(v);
return !isFinite(v);
})
)
return null;
@@ -218,10 +219,11 @@ window.__contrastAuditPrepare = function () {
// `color` rather than crashing parseColor or reporting a fabricated
// black.
var isSvgText = isSvgTextElement(el);
var fg = isSvgText ? tryParseSolidColor(cs.fill) || parseColor(cs.color) : parseColor(cs.color);
var fg = isSvgText ? parseColor(cs.fill) || parseColor(cs.color) : parseColor(cs.color);
if (!fg) continue;
if (fg[3] <= 0.01) continue;
var strokeWidth = parseFloat(cs.webkitTextStrokeWidth || "0");
var stroke = strokeWidth > 0 ? tryParseSolidColor(cs.webkitTextStrokeColor || "") : null;
var stroke = strokeWidth > 0 ? parseColor(cs.webkitTextStrokeColor || "") : null;
if (stroke && stroke[3] <= 0.01) stroke = null;
var fontSize = parseFloat(cs.fontSize);