Lets Safari play embedded WebM videos on supported imageboards: 4chan, 8chan, Gelbooru and Danbooru.
// ==UserScript==
// @name Safari Embedded WebM Support
// @namespace safari-embedded-webm-support
// @version 1.2
// @description Lets Safari play embedded WebM videos on supported imageboards: 4chan, 8chan, Gelbooru and Danbooru.
// @author Calumks
// @grant none
// @run-at document-end
// @match *://boards.4chan.org/*
// @match *://8ch.net/*
// @match *://gelbooru.com/index.php?page=post&*
// @match *://danbooru.donmai.us/posts/*
// ==/UserScript==
(function() {
'use strict';
// Create the VLC video player
function createVLC(video) {
let vlc = document.createElement('embed');
vlc.setAttribute('autoplay', true);
vlc.setAttribute('loop', true);
vlc.setAttribute('class', video.getAttribute('class'));
vlc.setAttribute('type', 'application/x-vlc-plugin');
vlc.setAttribute('pluginspage', 'http://www.videolan.org');
vlc.setAttribute('width', 855);
vlc.setAttribute('height', 481);
vlc.setAttribute(
'target', video.src || video.querySelector('source').src
);
video.after(vlc);
video.setAttribute(
'style', 'opacity: 0; height: 0; width: 0; display: none'
);
if (document.querySelector('a[title^="4chan X"]')) {
let thumbnail = video.parentNode.querySelector('img');
thumbnail.setAttribute('style', 'display: none');
video.removeAttribute('src');
}
return vlc;
}
// Destroy the VLC player
function destroyVLC(video, embed) {
if (document.querySelector('a[title^="4chan X"]')) {
let thumbnail = embed.parentNode.querySelector('img');
thumbnail.removeAttribute('style');
video.src = embed.target;
}
embed.remove();
}
// Filter observer nodes to video elements.
function filterNodes(nodes) {
nodes = Array.from(nodes);
let n1 = nodes.filter(n => n instanceof HTMLVideoElement);
let n2 = nodes
.filter(n => n instanceof HTMLElement)
.map(n => n.querySelector('video'))
.filter(n => n);
return n1.concat(n2);
}
// Dynamic videos
new MutationObserver(mutations => {
for(let mutation of mutations) {
filterNodes(mutation.addedNodes).map(n => createVLC(n));
filterNodes(mutation.removedNodes).map(n =>
destroyVLC(n, mutation.target.querySelector('embed')));
}
}).observe(document, {attributes: false, childList: true, subtree: true});
// On page load
let video = document.querySelector('video');
! video || createVLC(video);
})();