Tips for dynamically implementing CSS modifications prior to page loading

I am dynamically loading external CSS from a separate source using JavaScript, which updates the design of my website.

var link = document.createElement( "script" );
link.src = "http://externalsourcee.com/page/js/generate?token=I-css76theme";
document.getElementsByTagName( "head" )[0].appendChild( link );

The issue I am facing is that the updated CSS design on my webpage appears after the initial display, causing lag for the user.

My question is: How can I ensure that the user does not see any changes happening, and only sees the new design once the page has fully loaded? Alternatively, if some lag is unavoidable, how can I implement a loading screen to show progress while the CSS updates?

Note: I am unable to directly edit the HTML file, so changes must be made through externally loaded JavaScript.

javascripthtmlcssajax

Answer №1

Utilize the setTimeout function to dynamically load additional CSS styles.

Implement a "Please wait" message using JavaScript and CSS to keep users informed while design updates are being applied.

I trust this solution will be beneficial for you.

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