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node_modules/esquery/README.md 2 KB
f7563de62   Palak Handa   first commit
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  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:
  
  [demo](https://estools.github.io/esquery/)
  
  The following selectors are supported:
  * AST node type: `ForStatement`
  * [wildcard](http://dev.w3.org/csswg/selectors4/#universal-selector): `*`
  * [attribute existence](http://dev.w3.org/csswg/selectors4/#attribute-selectors): `[attr]`
  * [attribute value](http://dev.w3.org/csswg/selectors4/#attribute-selectors): `[attr="foo"]` or `[attr=123]`
  * attribute regex: `[attr=/foo.*/]`
  * attribute conditons: `[attr!="foo"]`, `[attr>2]`, `[attr<3]`, `[attr>=2]`, or `[attr<=3]` 
  * nested attribute: `[attr.level2="foo"]`
  * field: `FunctionDeclaration > Identifier.id`
  * [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`
  * [nth-child](http://dev.w3.org/csswg/selectors4/#the-nth-child-pseudo) (no ax+b support): `:nth-child(2)`
  * [nth-last-child](http://dev.w3.org/csswg/selectors4/#the-nth-last-child-pseudo) (no ax+b support): `:nth-last-child(1)`
  * [descendant](http://dev.w3.org/csswg/selectors4/#descendant-combinators): `ancestor descendant`
  * [child](http://dev.w3.org/csswg/selectors4/#child-combinators): `parent > child`
  * [following sibling](http://dev.w3.org/csswg/selectors4/#general-sibling-combinators): `node ~ sibling`
  * [adjacent sibling](http://dev.w3.org/csswg/selectors4/#adjacent-sibling-combinators): `node + adjacent`
  * [negation](http://dev.w3.org/csswg/selectors4/#negation-pseudo): `:not(ForStatement)`
  * [matches-any](http://dev.w3.org/csswg/selectors4/#matches): `:matches([attr] > :first-child, :last-child)`
  * [subject indicator](http://dev.w3.org/csswg/selectors4/#subject): `!IfStatement > [name="foo"]`
  * class of AST node: `:statement`, `:expression`, `:declaration`, `:function`, or `:pattern`
  
  [![Build Status](https://travis-ci.org/estools/esquery.png?branch=master)](https://travis-ci.org/estools/esquery)