How to remove unused Javascript?

The unused JS is being reported as being Autoptimize’s, but AO merely aggregates all the JS provided by your theme & plugins, so if you (really) want to tackle “remove unused JS” then you should look into your theme & plugins and doublecheck if you need all of those.

You might be able to get some improvement using e.g. “plugin organizer” to only allow plugins to work on specific pages.

hope this clarifies,
frank

Autoptimize just combines your theme & plugins JS sahadatuk21, that file does not contain any JavaScript created/ added by Autoptimize. You will have to review plugins & theme used if you want to improve there.

There are no “best autoptimize settings” I’m afraid sahadatuk21, it depends on theme, active plugins and theme & plugin configuration really. When testing your site, what (except for “unused JS”) is highlighted as sub-par?

for render-blocking CSS have a look at “inline & defer CSS”, see the AO FAQ for more info.

for the LCP image; try adding it in the HTML or the page like this:
<img src="https://yourdomain/image/path/yourimage.jpg" style="display:none;" />

What did you try exactly and on what URL?

OK, but what exactly did you try to do?

well, most unused JS is from … Google Ads 🙂

and for unused CSS;

you’re welcome, feel free to leave a review of the plugin and support here! 🙂

frank