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  "readme": "**esrefactor** (BSD licensed) is a little helper library for ECMAScript refactoring.\n\n## Usage\n\nWith Node.js:\n\n```bash\nnpm install esrefactor\n```\n\nIn a browser, include first all the dependents:\n\n```\n<!-- esrefactor depends on these libraries -->\n<script src=\"esprima.js\"></src>\n<script src=\"estraverse.js\"></src>\n<script src=\"escope.js\"></src>\n\n<script src=\"esrefactor.js\"></src>\n```\n## API\n\nBefore using the API, a context needs to be created:\n\n```javascript\nvar ctx = new esrefactor.Context(code);\n```\n\nwhere `code` is the source code.\n\n### Identification\n\nAn identifier, whether it is a variable, a function name, or a function\nparameter, can be identified using `identify()`. Example:\n\n```javascript\nvar ctx = new esrefactor.Context('var x = 42; y = x * 2; z = x / 2');\nvar id = ctx.identify(4);\n```\n\nThe only argument to `identify` is the zero-based position index.\n\nThe return object has 3 (three) properties:\n\n* `identifier`: the syntax node associated with the position\n* `declaration`: the declaration syntax node for the identifier\n* `references`: an array of all identical references\n\nIf there is no declaration for the identifier (e.g. `x = 42`, global\nleak), then `declaration` will be _null_.\n\nThe resolution of the declaration syntax node and the references array\ntake into account the identifier scope as defined in the official\nECMAScript 5.1 Specification (ECMA-262).\n\nNote that if there is no identifier in the given position index,\n`identify()` will return _undefined_.\n\n### Renaming\n\nAn identifier can be renamed using `rename()`. All other identical references\nassociated with that identifier will be renamed as well, again taking into\naccount the proper identifier scope. Renaming works for variable declaration,\nfunction name, and function parameter.\n\nFor `rename()` to work, it needs to have the identification result\n(via `identify`) and the new name for the identifier.\n\n```javascript\nvar ctx = new esrefactor.Context('var x; x = 42');\nvar id = ctx.identify(4);\nvar code = ctx.rename(id, 'answer');\n```\nIn the above example, `code` is `var answer; answer = 42`.\n\n",
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