This script add stroke order animations to WK. It uses the Draw Me A Kanji (DMAK) library (you can see a demo of the animations there). The kanji stroke data comes from KanjiVG.
Installation Instructions
Get Tampermonkey (installation instructions in this thread)
Click on the installation link (Tampermonkey should auto-detect .user.js files)
Install the script after you check the security (at least see that script will only change the wanikani website, all @include should be related to WK )
Features
Stroke order animations for kanji and vocab entries on:
Content pages
Lessons and lesson reviews
Reviews
This animation can be started/stopped and reset by clicking.
In addition, it adds a pop-up window with a large version of the animation, which includes stroke numbers and controls to step through the animations.