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55 lines
1.5 KiB
Markdown
55 lines
1.5 KiB
Markdown
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# ESLint Scope
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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).
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## Usage
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Install:
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```
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npm i eslint-scope --save
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```
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Example:
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```js
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var eslintScope = require('eslint-scope');
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var espree = require('espree');
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var estraverse = require('estraverse');
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var ast = espree.parse(code);
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var scopeManager = eslintScope.analyze(ast);
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var currentScope = scopeManager.acquire(ast); // global scope
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estraverse.traverse(ast, {
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enter: function(node, parent) {
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// do stuff
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if (/Function/.test(node.type)) {
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currentScope = scopeManager.acquire(node); // get current function scope
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}
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},
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leave: function(node, parent) {
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if (/Function/.test(node.type)) {
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currentScope = currentScope.upper; // set to parent scope
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}
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// do stuff
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}
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});
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```
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## Contributing
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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).
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## Build Commands
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* `npm test` - run all linting and tests
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* `npm run lint` - run all linting
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## License
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ESLint Scope is licensed under a permissive BSD 2-clause license.
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