Andrew-David J. AndrewDavid

I wanted to figure out the fastest way to load non-critical CSS so that the impact on initial page drawing is minimal.

TL;DR: Here's the solution I ended up with: https://github.com/filamentgroup/loadCSS/

For async JavaScript file requests, we have the async attribute to make this easy, but CSS file requests have no similar standard mechanism (at least, none that will still apply the CSS after loading - here are some async CSS loading conditions that do apply when CSS is inapplicable to media: https://gist.github.com/igrigorik/2935269#file-notes-md ).

Seems there are a couple ways to load and apply a CSS file in a non-blocking manner:

This is an example command for Backtick. A Backtick command consists of some executable JavaScript and a bit of metadata in JSON.

Here are the required steps to create a command:

Create a new Gist with a command.js and command.json file, or simply fork this one.
Write your JavaScript in command.js. This will be injected into and executed on the page the user is currently on when they run it.
Add some metadata to the command.json file:

name: The name of the command.

	# Unity folders
	/[Ll]ibrary/
	/[Tt]emp/
	/[Oo]bj/
	/[Bb]uild/
	/[Bb]uilds/
	/Assets/AssetStoreTools*

	# Visual Studio 2015 cache directory
	/.vs/

	#!/usr/bin/env bash

	# Update PHP Repo
	sudo rm /etc/apt/sources.list.d/ondrej-php5-5_6-trusty.list
	sudo add-apt-repository -y ppa:ondrej/php
	sudo apt-get -y update

	# Remove PHP 5.6
	sudo apt-get --remove purge -y php5 php5-cli php5-curl php5-gd php5-intl php5-mcrypt php5-memcached php5-mysqlnd php5-readline php5-sqlite php5-cgi php5-common php5-fpm php5-imagick php5-json php5-memcache php5-mongo php5-pgsql php5-redis php-pear
	sudo apt-get -y autoremove

	// The MIT License (MIT)
	// Copyright (c) 2016 David Evans @phosphoer

	// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

	// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR

	// LoadingScreenManager
	// --------------------------------
	// built by Martin Nerurkar (http://www.martin.nerurkar.de)
	// for Nowhere Prophet (http://www.noprophet.com)
	//
	// Licensed under GNU General Public License v3.0
	// http://www.gnu.org/licenses/gpl-3.0.txt

	using UnityEngine;
	using UnityEngine.UI;

	<script src="http://cdnjs.cloudflare.com/ajax/libs/processing.js/1.4.1/processing-api.min.js"></script><html>
	<!--
	Created using jsbin.com
	Source can be edited via http://jsbin.com/pdfjs-helloworld-v2/8598/edit
	-->
	<body>
	<canvas id="the-canvas" style="border:1px solid black"></canvas>
	<input id='pdf' type='file'/>

	<!-- Use latest PDF.js build from Github -->

	div {
	background: url('/img/background.jpg');
	}

	@media only screen and (-webkit-min-device-pixel-ratio: 2) {

	div {
	background-image: url('/img/[email protected]');
	background-size: 100px 100px;
	// This should match the dimensions of the original resolution image

	// Sess-io by @ThrivingKings
	// http://thrivingkings.com/read/Sess-iojs-handles-session-expiration-in-pure-JavaScript


	// Date fix for good ole IE8
	if (!Date.now) {
	Date.now = function() {
	return new Date().valueOf();
	}
	}