Gilles Hooghe ghooghe

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:

	docker pull <imagename>
	docker ps -a
	docker logs -f
	docker stop/start <containerid/name>
	docker exec -it <containerid/name> bash
	docker rm <containerid>
	docker rmi <imageid>

	-d detached mode
	-P expose ports

	$SERVER["socket"] == ":443" {
	ssl.engine = "enable"
	ssl.pemfile = "/etc/letsencrypt/live/yourdomain/ssl.pem"
	ssl.ca-file = "/etc/letsencrypt/live/yourdomain/fullchain.pem"
	ssl.dh-file = "/etc/ssl/certs/dhparam.pem"
	ssl.ec-curve = "secp384r1"
	ssl.honor-cipher-order = "enable"
	ssl.cipher-list = "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH"
	ssl.use-compression = "disable"
	setenv.add-response-header = (

	<head>
	...
	...

	<script>
	// async-load a stylesheet full of data-uri'd icons...
	(function( href ){
	links = document.getElementsByTagName( "link" ),
	elem = document.createElement( "link" ),
	ref = links[ links.length ];

	/*
	* anchor-include pattern for already-functional links that work as a client-side include
	* Copyright 2011, Scott Jehl, scottjehl.com
	* Dual licensed under the MIT
	* Idea from Scott Gonzalez
	* to use, place attributes on an already-functional anchor pointing to content
	* that should either replace, or insert before or after that anchor
	* after the page has loaded
	* Replace: <a href="..." data-replace="articles/latest/fragment">Latest Articles</a>
	* Before: <a href="..." data-before="articles/latest/fragment">Latest Articles</a>

	.hide-text {
	text-indent: 100%;
	white-space: nowrap;
	overflow: hidden;
	}

	/**
	* 1. The space content is one way to avoid an Opera bug when the
	* contenteditable attribute is included anywhere else in the document.
	* Otherwise it causes space to appear at the top and bottom of elements
	* that are clearfixed.
	* 2. The use of `table` rather than `block` is only necessary if using
	* `:before` to contain the top-margins of child elements.
	*/
	.cf:before,
	.cf:after {

	File eml = File.createTempFile("mailservice-output", ".eml");
	OutputStream out = new FileOutputStream(eml);
	msg.writeTo(out);
	logger.debug("Temporary e-mail file written to {}", eml.getAbsolutePath());
	IOUtils.closeQuietly(out);

	img {
	max-width: 100%;
	height: auto;
	}