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readme.md

Overview

Tools for working with sourceMappingURL comments.

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.