2.0.0

Version 2.0 introduces a new API that can handle a wider variety of use cases. The main difference is that the new API returns a metadata object instead of a string. The old API would simply return the video id:

Version 1.1.0

getVideoId('https://vimeo.com/1234');
//=> '1234'

Version 2.0 returns an object with the id, as well as the service provider:

getVideoId('https://vimeo.com/1234');
//=> { id: '1234', service: 'vimeo'}