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mgolmgol
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Selector: Use jQuery :has if CSS.supports(selector(...)) buggy
jQuery has followed the following logic for selector handling for ages: 1. Modify the selector to adhere to scoping rules jQuery mandates. 2. Try `qSA` on the modified selector. If it succeeds, use the results. 3. If `qSA` threw an error, run the jQuery custom traversal instead. It worked fine so far but now CSS has a concept of forgiving selector lists that some selectors like `:is()` & `:has()` use. That means providing unrecognized selectors as parameters to `:is()` & `:has()` no longer throws an error, it will just return no results. That made browsers with native `:has()` support break selectors using jQuery extensions inside, e.g. `:has(:contains("Item"))`. Detecting support for selectors can also be done via: ```js CSS.supports( "selector(SELECTOR_TO_BE_TESTED)" ) ``` which returns a boolean. There was a recent spec change requiring this API to always use non-forgiving parsing: w3c/csswg-drafts#7280 (comment) However, no browsers have implemented this change so far. To solve this, two changes are being made: 1. In browsers supports the new spec change to `CSS.supports( "selector()" )`, use it before trying `qSA`. 2. Otherwise, add `:has` to the buggy selectors list. Ref jquerygh-5098 Ref jquerygh-5107 Ref jquery/sizzle#486 Ref w3c/csswg-drafts#7676
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‎src/selector.js‎

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@@ -303,6 +303,27 @@ function find( selector, context, results, seed ) {
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}
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try {
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// `qSA` may not throw for unrecognized parts using forgiving parsing:
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// https://drafts.csswg.org/selectors/#forgiving-selector
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// like the `:has()` pseudo-class:
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// https://drafts.csswg.org/selectors/#relational
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// `CSS.supports` is still expected to return `false` then:
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// https://drafts.csswg.org/css-conditional-4/#typedef-supports-selector-fn
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// https://drafts.csswg.org/css-conditional-4/#dfn-support-selector
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if ( support.cssSupportsSelector &&
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// eslint-disable-next-line no-undef
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!CSS.supports( "selector(" + newSelector + ")" ) ) {
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// Support: IE 9 - 11+
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// Throw to get to the same code path as an error directly in qSA.
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// Note: once we only support browser supporting
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// `CSS.supports('selector(...)')`, we can most likely drop
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// the `try-catch`. IE doesn't implement the API.
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throw new Error();
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}
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push.apply( results,
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newContext.querySelectorAll( newSelector )
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);
@@ -549,6 +570,31 @@ function setDocument( node ) {
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return document.querySelectorAll( ":scope" );
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} );
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// Support: Chrome 105+, Firefox 104+, Safari 15.4+
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// Make sure forgiving mode is not used in `CSS.supports( "selector(...)" )`.
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//
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// `:is()` uses a forgiving selector list as an argument and is widely
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// implemented, so it's a good one to test against.
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support.cssSupportsSelector = assert( function() {
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/* eslint-disable no-undef */
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return CSS.supports( "selector(*)" ) &&
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// Support: Firefox 78-81 only
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// In old Firefox, `:is()` didn't use forgiving parsing. In that case,
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// fail this test as there's no selector to test against that.
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// `CSS.supports` uses unforgiving parsing
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document.querySelectorAll( ":is(:jqfake)" ) &&
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// `*` is needed as Safari & newer Chrome implemented something in between
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// for `:has()` - it throws in `qSA` if it only contains an unsupported
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// argument but multiple ones, one of which is supported, are fine.
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// We want to play safe in case `:is()` gets the same treatment.
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!CSS.supports( "selector(:is(*,:jqfake))" );
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/* eslint-enable */
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} );
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// ID filter and find
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if ( support.getById ) {
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Expr.filter.ID = function( id ) {
@@ -697,6 +743,18 @@ function setDocument( node ) {
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}
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} );
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if ( !support.cssSupportsSelector ) {
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// Support: Chrome 105+, Safari 15.4+
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// `:has()` uses a forgiving selector list as an argument so our regular
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// `try-catch` mechanism fails to catch `:has()` with arguments not supported
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// natively like `:has(:contains("Foo"))`. Where supported & spec-compliant,
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// we now use `CSS.supports("selector(SELECTOR_TO_BE_TESTED)")` but outside
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// that, let's mark `:has` as buggy to always use jQuery traversal for
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// `:has()`.
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rbuggyQSA.push( ":has" );
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}
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rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join( "|" ) );
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/* Sorting

‎test/unit/selector.js‎

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@@ -948,13 +948,23 @@ QUnit.test( "pseudo - nth-last-of-type", function( assert ) {
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} );
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QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "pseudo - has", function( assert ) {
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assert.expect( 3 );
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assert.expect( 4 );
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assert.t( "Basic test", "p:has(a)", [ "firstp", "ap", "en", "sap" ] );
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assert.t( "Basic test (irrelevant whitespace)", "p:has( a )", [ "firstp", "ap", "en", "sap" ] );
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assert.t( "Nested with overlapping candidates",
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"#qunit-fixture div:has(div:has(div:not([id])))",
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[ "moretests", "t2037", "fx-test-group", "fx-queue" ] );
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// Support: Safari 15.4+, Chrome 105+
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// `qSA` in Safari/Chrome throws for `:has()` with only unsupported arguments
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// but if you add a supported arg to the list, it will run and just potentially
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// return no results. Make sure this is accounted for. (gh-5098)
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// Note: Chrome 105 has this behavior only in 105.0.5195.125 or newer;
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// initially it shipped with a fully forgiving parsing in `:has()`.
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assert.t( "Nested with list arguments",
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"#qunit-fixture div:has(faketag, div:has(faketag, div:not([id])))",
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[ "moretests", "t2037", "fx-test-group", "fx-queue" ] );
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} );
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QUnit[ QUnit.jQuerySelectors ? "test" : "skip" ]( "pseudo - contains", function( assert ) {

‎test/unit/support.js‎

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@@ -64,6 +64,7 @@ testIframe(
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checkClone: true,
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checkOn: true,
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clearCloneStyle: true,
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cssSupportsSelector: false,
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cors: true,
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createHTMLDocument: true,
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disconnectedMatch: true,
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checkClone: true,
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checkOn: true,
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clearCloneStyle: false,
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cssSupportsSelector: false,
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cors: true,
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createHTMLDocument: true,
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disconnectedMatch: true,
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checkClone: true,
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checkOn: true,
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clearCloneStyle: false,
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cssSupportsSelector: false,
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cors: false,
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createHTMLDocument: true,
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disconnectedMatch: false,
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checkClone: true,
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checkOn: true,
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clearCloneStyle: true,
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cssSupportsSelector: false,
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cors: true,
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createHTMLDocument: true,
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disconnectedMatch: true,
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checkClone: true,
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checkOn: true,
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clearCloneStyle: true,
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cssSupportsSelector: false,
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cors: true,
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createHTMLDocument: true,
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disconnectedMatch: true,
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checkClone: true,
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checkOn: true,
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clearCloneStyle: true,
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cssSupportsSelector: false,
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cors: true,
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createHTMLDocument: true,
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disconnectedMatch: true,
@@ -208,6 +214,7 @@ testIframe(
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checkClone: true,
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checkOn: true,
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clearCloneStyle: true,
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cssSupportsSelector: false,
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cors: true,
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createHTMLDocument: true,
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disconnectedMatch: true,
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checkClone: true,
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clearCloneStyle: true,
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cssSupportsSelector: false,
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cors: true,
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createHTMLDocument: true,
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disconnectedMatch: true,
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clearCloneStyle: true,
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cssSupportsSelector: false,
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cors: true,
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clearCloneStyle: true,
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cssSupportsSelector: false,
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disconnectedMatch: true,
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checkClone: true,
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clearCloneStyle: true,
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cssSupportsSelector: false,
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@@ -328,6 +339,7 @@ testIframe(
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cssSupportsSelector: false,
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@@ -352,6 +364,7 @@ testIframe(
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checkOn: false,
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clearCloneStyle: true,
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cssSupportsSelector: false,
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cors: true,
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createHTMLDocument: true,
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disconnectedMatch: true,

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