https://github.com/goto-bus-stop/dash-ast

walk an AST, quickly
https://github.com/goto-bus-stop/dash-ast

ast estree javascript tree-walker

Last synced: 13 days ago
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walk an AST, quickly

• Host: GitHub
• URL: https://github.com/goto-bus-stop/dash-ast
• Owner: goto-bus-stop
• License: other
• Created: 2018-05-30T13:40:25.000Z (over 6 years ago)
• Default Branch: default
• Last Pushed: 2024-10-17T04:59:47.000Z (27 days ago)
• Last Synced: 2024-10-24T16:23:02.534Z (20 days ago)
• Topics: ast, estree, javascript, tree-walker
• Language: JavaScript
• Size: 33.2 KB
• Stars: 12
• Watchers: 2
• Forks: 2
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE.md

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README

        
# dash-ast

walk an AST, quickly

[![npm][npm-image]][npm-url]

[![travis][travis-image]][travis-url]

[![standard][standard-image]][standard-url]

[npm-image]: https://img.shields.io/npm/v/dash-ast.svg?style=flat-square

[npm-url]: https://www.npmjs.com/package/dash-ast

[travis-image]: https://img.shields.io/travis/goto-bus-stop/dash-ast.svg?style=flat-square

[travis-url]: https://travis-ci.org/goto-bus-stop/dash-ast

[standard-image]: https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat-square

[standard-url]: http://npm.im/standard

## Install

```

npm install dash-ast

```

## Usage

```js

var dashAst = require('dash-ast')

var isIdentifier = require('estree-is-identifier')

var deps = []

dashAst(ast, function (node, parent) {

  if (node.type === 'CallExpression' && isIdentifier(node.callee, 'require')) {

    deps.push(node.arguments[0])

  }

})

```

## API

### `dashAst(ast, callback)`

Call `callback(node, parent)` on each node in `ast`. This does a preorder traversal, i.e. `callback` receives child nodes _after_ the parent node.

### `dashAst(ast, { enter, leave })`

Call `enter(node, parent)` on each node in `ast` before traversing its children, and call `leave(enter, parent)` on each node _after_ traversing its children. If a node does not have children, `enter()` and `leave()` are called immediately after each other.

## License

[Apache-2.0](LICENSE.md)