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1ada95e04a
- Convert project to Javascript/Typescript - Allow custom headers to be passed in (optional) - Allow body to be optional
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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