Selector: Stop relying on CSS.supports( "selector(...)" ) #5206
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mgol
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I didn't write any new unit tests. I was wondering whether to do that but while being able to leverage the more forgiving native |
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I still need to prepare a version for |
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Sizzle PR: jquery/sizzle#493 |
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`CSS.supports( "selector(...)" )` has different semantics than selectors passed to `querySelectorAll`. Apart from the fact that the former returns `false` for unrecognized selectors and the latter throws, `qSA` is more forgiving and accepts some invalid selectors, auto-correcting them where needed - for example, mismatched brackers are auto-closed. This behavior difference is breaking for many users. To add to that, a recent CSSWG resolution made `:is()` & `:where()` the only pseudos with forgiving parsing; browsers are in the process of making `:has()` parsing unforgiving. Taking all that into account, we go back to our previous try-catch approach without relying on `CSS.supports( "selector(...)" )`. The only difference is we detect forgiving parsing in `:has()` and mark the selector as buggy. The PR also updates `playwright-webkit` so that we test against a version of WebKit that already has non-forgiving `:has()`. Fixes jquerygh-5194 Ref jquerygh-5098 Ref jquerygh-5107 Ref w3c/csswg-drafts#7676
Co-authored-by: Richard Gibson <richard.gibson@gmail.com>
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`CSS.supports( "selector(...)" )` has different semantics than selectors passed to `querySelectorAll`. Apart from the fact that the former returns `false` for unrecognized selectors and the latter throws, `qSA` is more forgiving and accepts some invalid selectors, auto-correcting them where needed - for example, mismatched brackers are auto-closed. This behavior difference is breaking for many users. To add to that, a recent CSSWG resolution made `:is()` & `:where()` the only pseudos with forgiving parsing; browsers are in the process of making `:has()` parsing unforgiving. Taking all that into account, we go back to our previous try-catch approach without relying on `CSS.supports( "selector(...)" )`. The only difference is we detect forgiving parsing in `:has()` and mark the selector as buggy. The PR also updates `playwright-webkit` so that we test against a version of WebKit that already has non-forgiving `:has()`. Fixes gh-5194 Closes gh-5207 Ref gh-5206 Ref gh-5098 Ref gh-5107 Ref w3c/csswg-drafts#7676
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`CSS.supports( "selector(...)" )` has different semantics than selectors passed to `querySelectorAll`. Apart from the fact that the former returns `false` for unrecognized selectors and the latter throws, `qSA` is more forgiving and accepts some invalid selectors, auto-correcting them where needed - for example, mismatched brackers are auto-closed. This behavior difference is breaking for many users. To add to that, a recent CSSWG resolution made `:is()` & `:where()` the only pseudos with forgiving parsing; browsers are in the process of making `:has()` parsing unforgiving. Taking all that into account, we go back to our previous try-catch approach without relying on `CSS.supports( "selector(...)" )`. The only difference is we detect forgiving parsing in `:has()` and mark the selector as buggy. Fixes jquery/jquery#5194 Closes gh-493 Ref jquery/jquery#5098 Ref jquery/jquery#5206 Ref jquery/jquery#5207 Ref gh-486 Ref w3c/csswg-drafts#7676
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Summary
CSS.supports( "selector(...)" )has different semantics than selectors passed toquerySelectorAll. Apart from the fact that the former returnsfalsefor unrecognized selectors and the latter throws,qSAis more forgiving and accepts some invalid selectors, auto-correcting them where needed - for example, mismatched brackets are auto-closed. This behavior difference is breaking for many users.To add to that, a recent CSSWG resolution made
:is()&:where()the only pseudos with forgiving parsing; browsers are in the process of making:has()parsing unforgiving.Taking all that into account, we go back to our previous try-catch approach without relying on
CSS.supports( "selector(...)" ). The only difference is we detect forgiving parsing in:has()and mark the selector as buggy.The PR also updates
playwright-webkitso that we test against a version of WebKit that already has non-forgiving:has().Fixes gh-5194
Ref gh-5098
Ref gh-5107
Ref w3c/csswg-drafts#7676
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Checklist
If needed, a docs issue/PR was created at https://github.com/jquery/api.jquery.com