How to combine javascript in WordPress for better performance

There are several ways to optimize a WordPress website. All of these options should be explored and put into action to avoid a slow loading website. Combining JavaScript in WordPress is one of the most important things you can do right off the bat.

WordPress offers users a lot of options in every way. This is why the platform is so popular and very user-friendly. Almost any task can be done with the right plugin.

Let’s take a look at why you should combine WordPress JavaScript and the plugin that lets you easily perform the function you need.

Why combine JavaScript in WordPress?


To understand why you want to combine external JavaScript in WordPress, you need to understand what actually happens when an HTML page is requested. Let’s take a look at the process to give you a better understanding.

When a page is requested, the browser you are using sends a message or request for all of its resources. Each file, including all HTML and external JavaScript files, is fetched from the website server and loaded into the browser.

Although all JavaScript files are downloaded together, they are actually executed in the order in which they appear in the HTML code. The separate download may slow down the website speed. But you really get slower page load speeds because the overall process of the executed sequence can take longer.

These WordPress JavaScript files as well as the CSS files are called render blocking resources. This just means that other components of your website won’t load until these JavaScript and CSS files are fully ready. Since all of these files are most often located in the header of the website, certain problems can occur.

Simple website speed tests can be performed to see if you are experiencing these issues. However, a sure way to help is to combine external CSS and external HTML JavaScript.

Let’s take a look at a plugin that lets you easily combine external JavaScript in WordPress.

Autooptimize
Autooptimize plugin

Autoptimize is a fantastic WordPress website optimization plugin that offers a number of features and settings. All this allows you to optimize your website in different ways.

One of the most important things that this plugin does is that you can combine external JavaScript in WordPress. It also aggregates, combines and caches scripts and styles. This is exactly the option we want to use today.

Below I’ll show you how to install, activate and use the plugin. Apart from the ability to combine JavaScript in WordPress and combine external CSS, Autoptimize also gives you the option:

  • Critical inline CSS.
  • Move the aggregated full CSS
  • Minimize HTML
  • Move scripts to the footer of the website
  • Optimize images
  • Lazy-load images
  • Optimize Google Fonts
  • Asynchronous non-aggregated JavaScript
  • Remove the WordPress core emoji


All of these things work together to achieve better website performance. Basically, Autoptimize speeds up your WordPress website by using all scripts and styles and minimizing and compressing them. It also minimizes the HTML code, so all of this works together to make your site leaner and get faster page load times.