Object assign error

[LoicUV]

Hey,

I'm importing mapbox-gl-geocoder from npm and using it with browserify. I get the following error:

Unknown plugin "object-assign" while parsing file: .../node_modules/mapbox-gl-geocoder/index.js

Any clue ?

EDIT :
Got it to work with https://www.npmjs.com/package/babel-plugin-object-assign since I'm using babelify, but I found another error:

geocoder.js:6 Uncaught ReferenceError: mapboxgl is not defined which is this line :

export default class Geocoder extends mapboxgl.Control {

My code is the following

import mapboxgl             from 'mapbox-gl'; // 0.12.1
import Geocoder             from 'mapbox-gl-geocoder';