$ npm install --save choreographer-js

const Choreographer = require('choreographer-js')

let choreographer = new Choreographer({
  animations: [
    {
      range: [-1, 1000],
      selector: '#box',
      type: 'scale',
      style: 'opacity',
      from: 0,
      to: 1
    }
  ]
})

window.addEventListener('mousemove', function(e) {
    choreographer.runAnimationsAt(e.clientX)
})