ESQuery is a library for querying the AST output by Esprima for patterns of syntax using a CSS style selector system. (Evacuated from Microsoft Github)
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6 years ago | |
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| debian | 6 years ago | |
| tests | 7 years ago | |
| .gitignore | 11 years ago | |
| .npmignore | 11 years ago | |
| .travis.yml | 10 years ago | |
| Makefile | 11 years ago | |
| README.md | 10 years ago | |
| esquery.js | 7 years ago | |
| grammar.pegjs | 8 years ago | |
| license.txt | 11 years ago | |
| package.json | 7 years ago | |
| parser.js | 8 years ago | |
| testRunner.html | 11 years ago |
README.md
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:
The following selectors are supported:
- AST node type:
ForStatement - wildcard:
* - attribute existence:
[attr] - attribute value:
[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 or last child:
:first-childor:last-child - nth-child (no ax+b support):
:nth-child(2) - nth-last-child (no ax+b support):
:nth-last-child(1) - descendant:
ancestor descendant - child:
parent > child - following sibling:
node ~ sibling - adjacent sibling:
node + adjacent - negation:
:not(ForStatement) - matches-any:
:matches([attr] > :first-child, :last-child) - subject indicator:
!IfStatement > [name="foo"] - class of AST node:
:statement,:expression,:declaration,:function, or:pattern
