Are CSS Stylesheets Loaded Asynchronously

Are CSS Stylesheets loaded Asynchronously

CSS files are loaded in the order they are included in the file.

If something from the first CSS file is overwriting something in the second CSS file, it is most likely due to your selectors being used incorrectly. Double-check your selectors for the elements of the page that are incorporating the style incorrectly.

How can I make my css files asynchronous?

// create a link tag
var link = document.createElement( "link" );
link.rel = "stylesheet";
link.href = "main.css";

And then call a async function that inserts this link tag.

async=true for css link tag

I don't think that will work.

But We can do that using JS:

  var resource = document.createElement('link'); 
  resource.setAttribute("rel", "stylesheet");
  resource.setAttribute("href","path/to/cssfile.css");
  resource.setAttribute("type","text/css");      
  var head = document.getElementsByTagName('head')[0];
  head.appendChild(resource);

I think
That it'll achieve what you're trying to do.

If you don't want javascript have a look at: How to load CSS asynchronously without using JavaScript?

Hope it'll help.

DEFER or ASYNC allowed on a stylesheet include?

Defer and Async are specific attributes of the tag <script> https://developer.mozilla.org/en/docs/Web/HTML/Element/script

They will not work in other tags, because they don't exist there. A stylesheet is not a script that contains logic to be executed in parallel or after the loading. A stylesheet is a list of static styles that get applied atomically to html.

Async load CSS - Firefox

The preload specification is only an Editor's Draft. It isn't standard. It should be considered experimental and not for production use.

Firefox doesn't support it as standard (although you can turn it on in the browser's settings if you want to test its implementation).

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