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node_modules/dash-ast/README.md
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| r789 | # 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. | ||||
| ### `dashAst.withParent(ast, callback)` | ||||
| Call `callback(node)` on each node in `ast`. This does a preorder traversal, i.e. `callback` receives child nodes _after_ the parent node. | ||||
| Each `node` has an additional property `node.parent` referring to the parent node. | ||||
| ### `dashAst.withParent(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. | ||||
| Each `node` has an additional property `node.parent` referring to the parent node. | ||||
| ## License | ||||
| [Apache-2.0](LICENSE.md) | ||||