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125 lines
4.4 KiB
Markdown
125 lines
4.4 KiB
Markdown
# convert-source-map [](http://travis-ci.org/thlorenz/convert-source-map)
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<a href="https://www.patreon.com/bePatron?u=8663953"><img alt="become a patron" src="https://c5.patreon.com/external/logo/become_a_patron_button.png" height="35px"></a>
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Converts a source-map from/to different formats and allows adding/changing properties.
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```js
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var convert = require('convert-source-map');
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var json = convert
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.fromComment('//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiYnVpbGQvZm9vLm1pbi5qcyIsInNvdXJjZXMiOlsic3JjL2Zvby5qcyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiQUFBQSIsInNvdXJjZVJvb3QiOiIvIn0=')
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.toJSON();
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var modified = convert
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.fromComment('//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiYnVpbGQvZm9vLm1pbi5qcyIsInNvdXJjZXMiOlsic3JjL2Zvby5qcyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiQUFBQSIsInNvdXJjZVJvb3QiOiIvIn0=')
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.setProperty('sources', [ 'SRC/FOO.JS' ])
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.toJSON();
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console.log(json);
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console.log(modified);
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```
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```json
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{"version":3,"file":"build/foo.min.js","sources":["src/foo.js"],"names":[],"mappings":"AAAA","sourceRoot":"/"}
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{"version":3,"file":"build/foo.min.js","sources":["SRC/FOO.JS"],"names":[],"mappings":"AAAA","sourceRoot":"/"}
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```
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## API
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### fromObject(obj)
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Returns source map converter from given object.
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### fromJSON(json)
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Returns source map converter from given json string.
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### fromBase64(base64)
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Returns source map converter from given base64 encoded json string.
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### fromComment(comment)
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Returns source map converter from given base64 encoded json string prefixed with `//# sourceMappingURL=...`.
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### fromMapFileComment(comment, mapFileDir)
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Returns source map converter from given `filename` by parsing `//# sourceMappingURL=filename`.
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`filename` must point to a file that is found inside the `mapFileDir`. Most tools store this file right next to the
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generated file, i.e. the one containing the source map.
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### fromSource(source)
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Finds last sourcemap comment in file and returns source map converter or returns null if no source map comment was found.
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### fromMapFileSource(source, mapFileDir)
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Finds last sourcemap comment in file and returns source map converter or returns null if no source map comment was
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found.
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The sourcemap will be read from the map file found by parsing `# sourceMappingURL=file` comment. For more info see
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fromMapFileComment.
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### toObject()
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Returns a copy of the underlying source map.
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### toJSON([space])
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Converts source map to json string. If `space` is given (optional), this will be passed to
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[JSON.stringify](https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/JSON/stringify) when the
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JSON string is generated.
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### toBase64()
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Converts source map to base64 encoded json string.
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### toComment([options])
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Converts source map to an inline comment that can be appended to the source-file.
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By default, the comment is formatted like: `//# sourceMappingURL=...`, which you would
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normally see in a JS source file.
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When `options.multiline == true`, the comment is formatted like: `/*# sourceMappingURL=... */`, which you would find in a CSS source file.
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### addProperty(key, value)
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Adds given property to the source map. Throws an error if property already exists.
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### setProperty(key, value)
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Sets given property to the source map. If property doesn't exist it is added, otherwise its value is updated.
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### getProperty(key)
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Gets given property of the source map.
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### removeComments(src)
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Returns `src` with all source map comments removed
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### removeMapFileComments(src)
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Returns `src` with all source map comments pointing to map files removed.
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### commentRegex
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Provides __a fresh__ RegExp each time it is accessed. Can be used to find source map comments.
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### mapFileCommentRegex
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Provides __a fresh__ RegExp each time it is accessed. Can be used to find source map comments pointing to map files.
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### generateMapFileComment(file, [options])
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Returns a comment that links to an external source map via `file`.
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By default, the comment is formatted like: `//# sourceMappingURL=...`, which you would normally see in a JS source file.
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When `options.multiline == true`, the comment is formatted like: `/*# sourceMappingURL=... */`, which you would find in a CSS source file.
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