A third optional parameter was added to SourceNode.fromStringWithSourceMap to specify a path that relative sources in the second parameter should be relative to. Issue #105.

If no file property is given to a SourceMapGenerator, then the resulting source map will no longer have a null file property. The property will simply not exist. Issue #104.

Fixed a bug where consecutive newlines were ignored in SourceNodes. Issue #116.

Make SourceNode work with windows style ("\r\n") newlines. Issue #103.

Fix bug involving source contents and the SourceMapGenerator.prototype.applySourceMap. Issue #100.

Fix some edge cases surrounding path joining and URL resolution.

Add a third parameter for relative path to SourceMapGenerator.prototype.applySourceMap.

Fix issues with mappings and EOLs.

Fixed a bug where SourceMapConsumer couldn't handle negative relative columns (issue 92).

Fixed test runner to actually report number of failed tests as its process exit code.

Fixed a typo when reporting bad mappings (issue 87).

Delay parsing the mappings in SourceMapConsumer until queried for a source location.

Support Sass source maps (which at the time of writing deviate from the spec in small ways) in SourceMapConsumer.

Do not join source root with a source, when the source is a data URI.

Extend the test runner to allow running single specific test files at a time.

Performance improvements in SourceNode.prototype.walk and SourceMapConsumer.prototype.eachMapping.

Source map browser builds will now work inside Workers.

Better error messages when attempting to add an invalid mapping to a SourceMapGenerator.