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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).