Minify and Defer JavaScript, CSS and HTML in WordPress | WordPress Training

Posted By on November 5, 2026

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Turn on JavaScript, CSS, and HTML optimization in Autoptimize and learn how to save your changes and check the site. You will also learn how to fix a slider or form that breaks after optimizing.
This lesson covers defer, minify, and the exclusion box for scripts that cause problems.

Lesson 3 of 4 in Autoptimize: https://www.youtube.com/playlist?list=PLcgqVlnb_W1Q

Practice it hands-on: https://app.wp-tutoring.com/lessons/ao3-01-03-javascript-css-html-optimization

Chapters:
0: 00 Intro
0: 53 Open Autoptimize
1: 04 Optimize JavaScript
1: 54 Optimize CSS and HTML
3: 51 Save and verify
4: 25 Recover a broken script
5: 17 Wrap-up & next steps

Official docs:
Autoptimize documentation: https://wordpress.org/plugins/autoptimize/

Recorded on WordPress 7.2.

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