Add video player to Slack

Adds a HTML5 video player when it senses a video file.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(У мене вже є менеджер скриптів, дайте мені встановити його!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Add video player to Slack
// @namespace    http://tech.velmont.net
// @version      0.1
// @description  Adds a HTML5 video player when it senses a video file.
// @author       Odin Hørthe Omdal
// @match        http://*.slack.com/*
// @match        https://*.slack.com/*
// @run-at       document-end
// @grant        none
// ==/UserScript==

function addVideoTags() {
	let files = Array.from(document.querySelectorAll('.file_container > a:not(.checked-for-video)'))
	files.forEach(anchorElement => {
		/* Only check once */
		anchorElement.classList.add('checked-for-video');
		if (!anchorElement.href.match(/(webm|ogv|ogg|mp4)$/i)) {
			/* Probably not a video file */
			return;
		}
		if (anchorElement.parentElement.querySelector('video')) {
			/* Already have video added */
			return;
		}
		
		let v = document.createElement('video');
		v.src = anchorElement.href;
		v.controls = true;
		v.style.maxWidth='100%';
		v.style.maxHeight = '100%';
		
		anchorElement.parentElement.appendChild(v);
	});
}																 

$(function() {
	$('#msgs_div').on('DOMSubtreeModified propertychange', addVideoTags);
});