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- Overview [](https://travis-ci.org/lydell/source-map-url)
- ========
- [](https://ci.testling.com/lydell/source-map-url)
- Tools for working with sourceMappingURL comments.
- ```js
- var sourceMappingURL = require("source-map-url")
- var code = [
- "!function(){...}();",
- "/*# sourceMappingURL=foo.js.map */"
- ].join("\n")
- sourceMappingURL.existsIn(code)
- // true
- sourceMappingURL.getFrom(code)
- // foo.js.map
- code = sourceMappingURL.insertBefore(code, "// License: MIT\n")
- // !function(){...}();
- // // License: MIT
- // /*# sourceMappingURL=foo.js.map */
- code = sourceMappingURL.removeFrom(code)
- // !function(){...}();
- // // License: MIT
- sourceMappingURL.existsIn(code)
- // false
- sourceMappingURL.getFrom(code)
- // null
- code += "//# sourceMappingURL=/other/file.js.map"
- // !function(){...}();
- // // License: MIT
- // //# sourceMappingURL=/other/file.js.map
- ```
- Installation
- ============
- - `npm install source-map-url`
- - `bower install source-map-url`
- - `component install lydell/source-map-url`
- Works with CommonJS, AMD and browser globals, through UMD.
- Usage
- =====
- ### `sourceMappingURL.getFrom(code)` ###
- Returns the url of the sourceMappingURL comment in `code`. Returns `null` if
- there is no such comment.
- ### `sourceMappingURL.existsIn(code)` ###
- Returns `true` if there is a sourceMappingURL comment in `code`, or `false`
- otherwise.
- ### `sourceMappingURL.removeFrom(code)` ###
- Removes the sourceMappingURL comment in `code`. Does nothing if there is no
- such comment. Returns the updated `code`.
- ### `sourceMappingURL.insertBefore(code, string)` ###
- Inserts `string` before the sourceMappingURL comment in `code`. Appends
- `string` to `code` if there is no such comment.
- Lets you append something to a file without worrying about burying the
- sourceMappingURL comment (by keeping it at the end of the file).
- ### `sourceMappingURL.regex` ###
- The regex that is used to match sourceMappingURL comments. It matches both `//`
- and `/**/` comments, thus supporting both JavaScript and CSS.
- Tests
- =====
- Start by running `npm test`, which lints the code and runs the test suite in Node.js.
- To run the tests in a browser, run `testling` (`npm install -g testling`) or `testling -u`.
- License
- =======
- [The X11 (“MIT”) License](LICENSE).
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