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Tim van der Lippe
c8f6ffd7c3
Also update the PRESUBMIT linter configuration to make sure it actually runs the linter when updating ESLint. Otherwise, it would not properly do the full linter check. R=jacktfranklin@chromium.org DISABLE_THIRD_PARTY_CHECK=Update ESLint Bug: 1068145 Change-Id: Ibf2de156366dc64c90ee1aced5537d2038e7a268 Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2137384 Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org> Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
28 lines
2.1 KiB
Markdown
28 lines
2.1 KiB
Markdown
ESQuery is a library for querying the AST output by Esprima for patterns of syntax using a CSS style selector system. Check out the demo:
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[demo](https://estools.github.io/esquery/)
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The following selectors are supported:
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* AST node type: `ForStatement`
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* [wildcard](http://dev.w3.org/csswg/selectors4/#universal-selector): `*`
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* [attribute existence](http://dev.w3.org/csswg/selectors4/#attribute-selectors): `[attr]`
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* [attribute value](http://dev.w3.org/csswg/selectors4/#attribute-selectors): `[attr="foo"]` or `[attr=123]`
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* attribute regex: `[attr=/foo.*/]` or (with flags) `[attr=/foo.*/is]`
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* attribute conditions: `[attr!="foo"]`, `[attr>2]`, `[attr<3]`, `[attr>=2]`, or `[attr<=3]`
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* nested attribute: `[attr.level2="foo"]`
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* field: `FunctionDeclaration > Identifier.id`
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* [First](http://dev.w3.org/csswg/selectors4/#the-first-child-pseudo) or [last](http://dev.w3.org/csswg/selectors4/#the-last-child-pseudo) child: `:first-child` or `:last-child`
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* [nth-child](http://dev.w3.org/csswg/selectors4/#the-nth-child-pseudo) (no ax+b support): `:nth-child(2)`
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* [nth-last-child](http://dev.w3.org/csswg/selectors4/#the-nth-last-child-pseudo) (no ax+b support): `:nth-last-child(1)`
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* [descendant](http://dev.w3.org/csswg/selectors4/#descendant-combinators): `ancestor descendant`
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* [child](http://dev.w3.org/csswg/selectors4/#child-combinators): `parent > child`
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* [following sibling](http://dev.w3.org/csswg/selectors4/#general-sibling-combinators): `node ~ sibling`
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* [adjacent sibling](http://dev.w3.org/csswg/selectors4/#adjacent-sibling-combinators): `node + adjacent`
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* [negation](http://dev.w3.org/csswg/selectors4/#negation-pseudo): `:not(ForStatement)`
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* [has](https://drafts.csswg.org/selectors-4/#has-pseudo): `:has(ForStatement)`
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* [matches-any](http://dev.w3.org/csswg/selectors4/#matches): `:matches([attr] > :first-child, :last-child)`
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* [subject indicator](http://dev.w3.org/csswg/selectors4/#subject): `!IfStatement > [name="foo"]`
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* class of AST node: `:statement`, `:expression`, `:declaration`, `:function`, or `:pattern`
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[](https://travis-ci.org/estools/esquery)
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