| [6a3a178] | 1 | Overview [](https://travis-ci.org/lydell/source-map-url)
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| 2 | ========
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| 3 |
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| 4 | [](https://ci.testling.com/lydell/source-map-url)
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| 5 |
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| 6 | Tools for working with sourceMappingURL comments.
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| 7 |
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| 8 | ```js
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| 9 | var sourceMappingURL = require("source-map-url")
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| 10 |
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| 11 | var code = [
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| 12 | "!function(){...}();",
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| 13 | "/*# sourceMappingURL=foo.js.map */"
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| 14 | ].join("\n")
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| 15 |
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| 16 | sourceMappingURL.existsIn(code)
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| 17 | // true
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| 18 |
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| 19 | sourceMappingURL.getFrom(code)
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| 20 | // foo.js.map
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| 21 |
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| 22 | code = sourceMappingURL.insertBefore(code, "// License: MIT\n")
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| 23 | // !function(){...}();
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| 24 | // // License: MIT
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| 25 | // /*# sourceMappingURL=foo.js.map */
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| 26 |
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| 27 | code = sourceMappingURL.removeFrom(code)
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| 28 | // !function(){...}();
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| 29 | // // License: MIT
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| 30 |
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| 31 | sourceMappingURL.existsIn(code)
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| 32 | // false
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| 33 |
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| 34 | sourceMappingURL.getFrom(code)
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| 35 | // null
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| 36 |
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| 37 | code += "//# sourceMappingURL=/other/file.js.map"
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| 38 | // !function(){...}();
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| 39 | // // License: MIT
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| 40 | // //# sourceMappingURL=/other/file.js.map
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| 41 | ```
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| 42 |
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| 43 |
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| 44 | Installation
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| 45 | ============
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| 46 |
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| 47 | - `npm install source-map-url`
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| 48 | - `bower install source-map-url`
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| 49 | - `component install lydell/source-map-url`
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| 50 |
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| 51 | Works with CommonJS, AMD and browser globals, through UMD.
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| 52 |
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| 53 |
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| 54 | Usage
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| 55 | =====
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| 56 |
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| 57 | ### `sourceMappingURL.getFrom(code)` ###
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| 58 |
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| 59 | Returns the url of the sourceMappingURL comment in `code`. Returns `null` if
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| 60 | there is no such comment.
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| 61 |
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| 62 | ### `sourceMappingURL.existsIn(code)` ###
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| 63 |
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| 64 | Returns `true` if there is a sourceMappingURL comment in `code`, or `false`
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| 65 | otherwise.
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| 66 |
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| 67 | ### `sourceMappingURL.removeFrom(code)` ###
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| 68 |
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| 69 | Removes the sourceMappingURL comment in `code`. Does nothing if there is no
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| 70 | such comment. Returns the updated `code`.
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| 71 |
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| 72 | ### `sourceMappingURL.insertBefore(code, string)` ###
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| 73 |
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| 74 | Inserts `string` before the sourceMappingURL comment in `code`. Appends
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| 75 | `string` to `code` if there is no such comment.
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| 76 |
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| 77 | Lets you append something to a file without worrying about burying the
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| 78 | sourceMappingURL comment (by keeping it at the end of the file).
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| 79 |
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| 80 | ### `sourceMappingURL.regex` ###
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| 81 |
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| 82 | The regex that is used to match sourceMappingURL comments. It matches both `//`
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| 83 | and `/**/` comments, thus supporting both JavaScript and CSS.
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| 84 |
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| 85 |
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| 86 | Tests
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| 87 | =====
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| 88 |
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| 89 | Start by running `npm test`, which lints the code and runs the test suite in Node.js.
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| 90 |
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| 91 | To run the tests in a browser, run `testling` (`npm install -g testling`) or `testling -u`.
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| 92 |
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| 93 |
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| 94 | License
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| 95 | =======
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| 96 |
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| 97 | [The X11 (“MIT”) License](LICENSE).
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