How to implement a similar effect?

Question

JavaScript

How to accomplish the following task: when you move the mouse, you need to create the effect of fragments.
This example has everything you need, but there is quite a lot of code and it will take a lot of time to dig into it. Tried to do it, but without success.
I know this is implemented with three.js.

Answer 1

1) Find the coordinates of the cursor relative to the camera
2) Create triangles around the cursor using Delaunay triangulation
3) Write a refraction shader for the created triangles
4) PROFIT!!!