# convert-source-map [![build status](https://secure.travis-ci.org/thlorenz/convert-source-map.png)](http://travis-ci.org/thlorenz/convert-source-map) Converts a source-map from/to different formats and allows adding/changing properties. ```js var convert = require('convert-source-map'); var json = convert .fromComment('//@ sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiZm9vLmpzIiwic291cmNlcyI6WyJjb25zb2xlLmxvZyhcImhpXCIpOyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiQUFBQSIsInNvdXJjZVJvb3QiOiIvIn0=') .toJSON(); var modified = convert .fromComment('//@ sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiZm9vLmpzIiwic291cmNlcyI6WyJjb25zb2xlLmxvZyhcImhpXCIpOyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiQUFBQSIsInNvdXJjZVJvb3QiOiIvIn0=') .setProperty('sources', [ 'CONSOLE.LOG("HI");' ]) .toJSON(); console.log(json); console.log(modified); ``` ```json {"version":3,"file":"foo.js","sources":["console.log(\"hi\");"],"names":[],"mappings":"AAAA","sourceRoot":"/"} {"version":3,"file":"foo.js","sources":["CONSOLE.LOG(\"HI\");"],"names":[],"mappings":"AAAA","sourceRoot":"/"} ``` ## API ### fromObject(obj) Returns source map converter from given object. ### fromJSON(json) Returns source map converter from given json string. ### fromBase64(base64) Returns source map converter from given base64 encoded json string. ### fromComment() Returns source map converter from given base64 encoded json string prefixed with `//@ sourceMappintURL=...`. ### fromSource() Finds last sourcemap comment in file and returns source map converter or returns null if no source map comment was found. ### toObject() Returns a copy of the underlying source map. ### toJSON([space]) Converts source map to json string. If `space` is given (optional), this will be passed to [JSON.stringify](https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/JSON/stringify) when the JSON string is generated. ### toBase64() Converts source map to base64 encoded json string. ### toComment() Converts source map to base64 encoded json string prefixed with `//@ sourceMappingURL=...`. ### addProperty(key, value) Adds given property to the source map. Throws an error if property already exists. ### setProperty(key, value) Sets given property to the source map. If property doesn't exist it is added, otherwise its value is updated. ### getProperty(key) Gets given property of the source map. ### removeComments(src) Returns `src` with all source map comments removed ### commentRegex Returns the regex used to find source map comments.