Update May/2020

There are an array of considerations when disabling inertia scroll, with respect to browser compatibility. Here is a repo which attempts to abstract away those compatibility problems: https://github.com/willmcpo/body-scroll-lock

This repo attempts to reconcile drawbacks in both older solutions listed below:

Update Jan/2019

There's a simpler CSS solution:

body {

    overflow: hidden;

}

Original Answer:

I found a perfect solution - override the scroll events.

$body.addEventListener(mousewheel, function(e){ e.preventDefault(); });

Turns out that inertia scroll is really just an extension of normal scrolling, where a special mouse driver emits scroll events in such a way as to emulate the inertia effect. So overriding scroll events inherently prevents inertia scroll.

See this link for examples with cross-platform compatibility.