Home/ Questions/Q 7445251
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-29T11:46:30+00:00

I’ve got several JavaScript files that load along with many of my pages, costing

  • 0

I’ve got several JavaScript files that load along with many of my pages, costing valuable tens of kilobytes of data download. One of these is a version of jquery.min.js which although minified, is still 25kb or so.

My issue is that a huge chunk of mobile phones don’t support JavaScript so the downloading of this and other JS files is a waste of data. Is there anyway to lazy load the JQuery file by adding a <script> tag in the page that calls the JS file and would obviously only execute if a browser supports JavaScript, which would only then make sense to download it?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    To load script files only under certain conditions, I have used something like:

    <script type="text/javascript">
    document.write('<scr'+'ipt type="text/javascript" src="/js/jquery.min.js"></scr'+'ipt>');
</script>

    Note: this only works inline, after the document is done loading, document.write() will have undesired effects.

    Note 2: It is important to break '</script>' like '</scr'+'ipt>' so as to not confuse the browser’s parser into thinking your true script block is ended. I do the opening script tag the same way for good measure.

    • 0