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Handle potentially invalid CSS selector
Older browser versions may not support valid CSS selector syntax in newer browser versions. Related feedback: - https://www.reddit.com/r/uBlockOrigin/comments/yzw5pt/
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@ -51,18 +51,37 @@ const loggedSelectors = new Set();
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const rePseudoElements = /:(?::?after|:?before|:[a-z-]+)$/;
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const hasSelector = function(selector, context = document) {
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try {
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return context.querySelector(selector) !== null;
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}
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catch(ex) {
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}
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return false;
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};
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const safeMatchSelector = function(selector, context) {
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const safeSelector = rePseudoElements.test(selector)
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? selector.replace(rePseudoElements, '')
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: selector;
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return context.matches(safeSelector);
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try {
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return context.matches(safeSelector);
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}
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catch(ex) {
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}
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return false;
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};
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const safeQuerySelector = function(selector, context = document) {
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const safeSelector = rePseudoElements.test(selector)
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? selector.replace(rePseudoElements, '')
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: selector;
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return context.querySelector(safeSelector);
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try {
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return context.querySelector(safeSelector);
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}
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catch(ex) {
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}
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return null;
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};
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const safeGroupSelectors = function(selectors) {
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@ -85,7 +104,7 @@ const processDeclarativeSimple = function(node, out) {
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}
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if (
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(node === document || node.matches(simpleDeclarativeStr) === false) &&
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(node.querySelector(simpleDeclarativeStr) === null)
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(hasSelector(simpleDeclarativeStr, node) === false)
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) {
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return;
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}
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@ -110,7 +129,7 @@ const processDeclarativeComplex = function(out) {
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if ( complexDeclarativeStr === undefined ) {
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complexDeclarativeStr = safeGroupSelectors(complexDeclarativeSet);
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}
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if ( document.querySelector(complexDeclarativeStr) === null ) { return; }
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if ( hasSelector(complexDeclarativeStr) === false ) { return; }
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for ( const selector of complexDeclarativeSet ) {
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if ( safeQuerySelector(selector) === null ) { continue; }
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out.push(`##${selector}`);
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@ -140,7 +159,7 @@ const processExceptions = function(out) {
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if ( exceptionStr === undefined ) {
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exceptionStr = safeGroupSelectors(exceptionDict.keys());
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}
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if ( document.querySelector(exceptionStr) === null ) { return; }
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if ( hasSelector(exceptionStr) === false ) { return; }
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for ( const [ selector, raw ] of exceptionDict ) {
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if ( safeQuerySelector(selector) === null ) { continue; }
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out.push(`#@#${raw}`);
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