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Filter inactive linked CSS states

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Keep valid empty pseudo-class matches authoritative and omit selector-less linked at-rules that cannot be tied to rendered nodes.

AI assistance disclosure: Codex helped implement and test this fix under maintainer direction.
This commit is contained in:
Paul Bakaus
2026-09-02 11:05:58 -07:00
parent 720222e1df
commit ecfcd77221
5 changed files with 64 additions and 17 deletions
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cli/engine/browser/injected/index.mjs
+17 -8
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@@ -1283,10 +1283,17 @@ if (IS_BROWSER) {
function selectorNodesForLiveDom(root, selector) {
const raw = String(selector || '').trim();
if (!raw) return null;
try {
const exact = Array.from(root.querySelectorAll(raw));
if (exact.length > 0) return exact;
} catch { /* Dynamic/unsupported pseudos get the fallback below. */ }
const hasPseudoElement = (
/::[a-zA-Z-]+(?:\([^)]*\))?|:(?:before|after|first-letter|first-line)\b/i.test(raw)
);
if (!hasPseudoElement) {
// An empty result from a valid full selector is authoritative. In
// particular, do not broaden inactive :hover/:focus/:not() rules to
// their host element by stripping pseudo-classes.
try { return Array.from(root.querySelectorAll(raw)); }
catch { return null; }
}
// Resolve pseudo-elements to their originating live elements. An attached
// pseudo-element (`.card::before`) belongs to the element before it, while
@@ -1296,9 +1303,8 @@ if (IS_BROWSER) {
// invalid selector `main >` and makes absent hosts indistinguishable from
// selectors the DOM API cannot parse.
const fallback = raw
.replace(/(^|[\s>+~,])::[a-zA-Z-]+(\([^)]*\))?/g, '$1*')
.replace(/::[a-zA-Z-]+(\([^)]*\))?/g, '')
.replace(/:[a-zA-Z-]+(\([^)]*\))?/g, '')
.replace(/(^|[\s>+~,])(?:::[a-zA-Z-]+(?:\([^)]*\))?|:(?:before|after|first-letter|first-line)\b)/gi, '$1*')
.replace(/::[a-zA-Z-]+(?:\([^)]*\))?|:(?:before|after|first-letter|first-line)\b/gi, '')
.trim()
.replace(/,\s*(?=,|$)/g, '');
if (!fallback || /^[,\s]*$/.test(fallback)) return null;
@@ -1408,7 +1414,10 @@ if (IS_BROWSER) {
appendRules(nested, requiresAppliedMatch || isContainerCssRule(rule));
continue;
}
if (cssText) parts.push(cssText);
// Selector-less leaf at-rules (notably @keyframes) cannot be tied to a
// rendered node. Their activating selector declarations are already
// retained above, while admitting the leaf text would let unused or
// conditionally inactive CSS create page-level findings.
}
};
const appendSheet = (sheet) => {