wavesurfer.init is not a function

So I installed both react-wavesurfer and wavesurfer.js packages.
Added the alias to my webpack.config.dev.js
`      wavesurfer: require.resolve('wavesurfer.js')`
Added the plugin as well:
```
new webpack.ProvidePlugin({
      WaveSurfer: 'wavesurfer.js'
    })
```

And I get this error:
uncaught at _callee2 TypeError: this._wavesurfer.init is not a function

Any idea?