convert-source-map

Converts a source-map from/to different formats and allows adding/changing properties.

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);

{"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 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.