[Input range slider]

Hi everyone!

I making familiar range slider and have a question. 

In my case left slider shouldn't go beyond the right one and vice versa.

I did it, but question is:

> How to set coordinates in % and save logic?

When I set left property, other features doesn't work.

TweenLite.set(this.leftKnob.target, {
  left: '0%',
  onUpdate: this.leftKnob.update,
  onUpdateScope: this.leftKnob
});

TweenLite.set(this.rightKnob.target, {
  left: '100%',
  onUpdate: this.rightKnob.update,
  onUpdateScope: this.rightKnob
});

So, I can use container.offsetWidth, but I think it's not a good idea. 

This way I must calculate this value every time on browser window size change.

My code is

See the Pen mxmoQz by shubich (@shubich) on CodePen

.