How to Defer Parsing of JavaScript in WordPress (4 Methods)

If you're getting the "Defer Parsing of JavaScript" warning, you've come to the right place! This tutorial will show you four different ways to fix it 💯

The "Defer Parsing of JavaScript" is a common warning to get if you're putting your site through a performance testing tool. Implementing these changes can optimize your website's loading times, especially for mobile users. This warning can be a little tricky to understand, so we're breaking it down for you in this tutorial.

Deferring the parsing of JavaScript on your WordPress site can improve its performance, but it's important to do it safely, so you don't damage your site's features. That's why we're teaching you four different ways to safely implement this change on your WordPress site.
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🕘Timestamps

0:00 How to Defer Parsing of JavaScript in WordPress
0:49 What Does It Mean to Defer Parsing of JavaScript in WordPress?
2:22 How to Tell If You Need to Defer Parsing of JavaScript
3:58 Methods to Defer Parsing of JavaScript in WordPress
4:31 Free Async JavaScript Plugin
5:51 Use the WP Rocket Plugin
6:26 Use Varvy’s Recommended Method (Code)

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📚Resources

🧑‍💻Varvy's code (and its variations) can be found in our written guide on how to defer parsing of JavaScript in WordPress:

🆓Free Async JavaScript Plugin

🔒How to Eliminate Render-Blocking Resources on WordPress (CSS + JavaScript)

⏩A Deep Dive Into the GTmetrix Speed Test Tool

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🔇This video has captions (translated by real humans!) in English, Spanish, Italian, French, Portuguese, German, Dutch, Japanese, Danish and Swedish. Click on the CC to set your preferred language.

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