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# ESLint Scope | |
ESLint Scope is the [ECMAScript](http://www.ecma-international.org/publications/standards/Ecma-262.htm) scope analyzer used in ESLint. It is a fork of [escope](http://github.com/estools/escope). | |
## Usage | |
Install: | |
``` | |
npm i eslint-scope --save | |
``` | |
Example: | |
```js | |
var eslintScope = require('eslint-scope'); | |
var espree = require('espree'); | |
var estraverse = require('estraverse'); | |
var ast = espree.parse(code); | |
var scopeManager = eslintScope.analyze(ast); | |
var currentScope = scopeManager.acquire(ast); // global scope | |
estraverse.traverse(ast, { | |
enter: function(node, parent) { | |
// do stuff | |
if (/Function/.test(node.type)) { | |
currentScope = scopeManager.acquire(node); // get current function scope | |
} | |
}, | |
leave: function(node, parent) { | |
if (/Function/.test(node.type)) { | |
currentScope = currentScope.upper; // set to parent scope | |
} | |
// do stuff | |
} | |
}); | |
``` | |
## Contributing | |
Issues and pull requests will be triaged and responded to as quickly as possible. We operate under the [ESLint Contributor Guidelines](http://eslint.org/docs/developer-guide/contributing), so please be sure to read them before contributing. If you're not sure where to dig in, check out the [issues](https://github.com/eslint/eslint-scope/issues). | |
## Build Commands | |
* `npm test` - run all linting and tests | |
* `npm run lint` - run all linting | |
## License | |
ESLint Scope is licensed under a permissive BSD 2-clause license. | |