// ==UserScript==
// @name        Disable coursera video play when clicking transscript
// @description Avoid paused coursera video being played when clicking transscript.
// @version 20220506
// @match       https://www.coursera.org/learn/*
// @grant       none
// @author      -
// @run-at document-idle
// @supportURL https://github.com/whtsky/userscripts/issues
// @namespace https://greasyfork.org/users/164794
// ==/UserScript==
const noop = () => {}
const preventVideoPlay = () => {
const video = document.querySelector('video')
const oldVideoPlay = video.play
video.play = noop
video.oldPlay = oldVideoPlay
}
const resumeVideoPlay = () => {
const video = document.querySelector('video')
video.play = video.oldPlay ?? video.play
}
const check = (changes, observer) => {
const transscriptDiv = document.querySelector('.rc-TranscriptHighlighter')
if (transscriptDiv) {
transscriptDiv.addEventListener('mouseenter', preventVideoPlay)
transscriptDiv.addEventListener('mouseleave', resumeVideoPlay)
}
}
new MutationObserver(check).observe(document, { childList: true, subtree: true })