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