Version 1.4:
Now supporting extra study page
Today WaniKani has added a new functionality: extra study. This update adds support for this new page. The .on() selector now also accepts the keyword extraStudy.
// @require https://greasyfork.org/scripts/430565-wanikani-item-info-injector/code/WaniKani%20Item%20Info%20Injector.user.js?version=1024045