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				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.*/]or (with flags)[attr=/foo.*/is] - attribute conditions: 
[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) - has: 
:has(ForStatement) - matches-any: 
:matches([attr] > :first-child, :last-child) - subject indicator: 
!IfStatement > [name="foo"] - class of AST node: 
:statement,:expression,:declaration,:function, or:pattern 
