Changing range slider knob to show value

I’d like to show the value of the range slider within the range knob. Something like this:

Capture

And obviously, I’d like to do this within the change event. Any js code snippet to do this would be appreciated.

(So, what goes in the function(e, range)?)

app.range.create({
	el: '#rangeWeatherAdjust',
	label: true,
	on: {
		change: function (e, range) {
			
		}
	}
})