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react-native-devtools-frontend/node_modules/esquery/README.md
T
Tim van der Lippe c8f6ffd7c3 Update ESLint to 6.8.0
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>
2020-04-06 13:52:18 +00:00

2.1 KiB

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

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-child or :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

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