### Install RegJSParser

Source: https://github.com/jviereck/regjsparser/blob/gh-pages/README.md

Install the RegJSParser package using npm.

```bash
npm install regjsparser
```

--------------------------------

### Run Tests

Source: https://github.com/jviereck/regjsparser/blob/gh-pages/README.md

Execute the test suite for RegJSParser using npm test.

```bash
npm test
```

--------------------------------

### Update Fixtures

Source: https://github.com/jviereck/regjsparser/blob/gh-pages/README.md

Update the reference fixture files by running the provided Node.js script from the repository's top directory.

```bash
node test/update-fixtures.js
```

--------------------------------

### Basic RegExp Parsing

Source: https://github.com/jviereck/regjsparser/blob/gh-pages/README.md

Parse a simple regular expression string and log the resulting parse tree. This is the most basic usage of the library.

```javascript
var parse = require('regjsparser').parse;

var parseTree = parse('^a'); // /^a/
console.log(parseTree);
```

--------------------------------

### Advanced RegExp Parsing with Options

Source: https://github.com/jviereck/regjsparser/blob/gh-pages/README.md

Parse a regular expression string with additional features enabled, such as unicode property escapes, named groups, and lookbehind assertions. Refer to the linked GitHub pull requests for details on each option.

```javascript
var parse = require('regjsparser').parse;

var parseTree = parse('^a', '', {
  // SEE: https://github.com/jviereck/regjsparser/pull/78
  unicodePropertyEscape: true,

  // SEE: https://github.com/jviereck/regjsparser/pull/83
  namedGroups: true,

  // SEE: https://github.com/jviereck/regjsparser/pull/89
  lookbehind: true
});
console.log(parseTree);
```

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