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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.
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