Expected behavior

I installed Velocity 2, and expected it to work, but it does not.

Actual behavior

There is a console message saying Velocity is already installed because MDB uses Materialize.

I am currently on MDB 4.5.12, and in this version Velocity 1.2.3 appears to be included. However, calls to Velocity seem to do nothing. For example I tried this, which is right out of the docs:

var elements = document.querySelector("div");

Velocity(elements, { "background-color": "red" });

...Which should turn a lot of things red. Nothing happens. No errors either. Also tried it with jQuery syntax.

What am I missing?