WaniKani Lesson Study Quiz

wlsq.user.js

// ==UserScript==
// @name        Wanikani Lesson Study Quiz
// @namespace   smrq
// @description Hides the meaning of items while re-reviewing lessons
// @include     https://www.wanikani.com/lesson/session
// @version     1.0.0
// @author      Greg Smith
// @license     MIT
// @run-at      document-end
// @grant       none
// @homepageURL https://gist.github.com/smrq/e5f65010e3818df5f810d66cbb078956
// ==/UserScript==

(function() {
	'use strict';

	const style = document.createElement('style');
	style.innerHTML = `
.self-study #main-info #meaning {
	opacity: 0;
	transition: opacity 150ms linear;
}

.self-study #main-info:hover #meaning {
	opacity: 1;
}
`;
	document.head.appendChild(style);

	(function tryObserve() {
		const quizElement = document.querySelector('#batch-items li[data-index="quiz"]');
		if (!quizElement) {
			setTimeout(tryObserve, 100);
			return;
		}

		const observer = new MutationObserver(function (mutations) {
			if (quizElement.classList.contains('active-quiz')) {
				document.querySelector('#lessons').classList.add('self-study');
			} else {
				document.querySelector('#lessons').classList.remove('self-study');
			}
		});

		observer.observe(quizElement, {
			attributes: true,
			attributeFilter: ['class']
		});
	})();
})();