Minify CSS, HTML, and JavaScript
Minify text files like JavaScript, CSS, and HTML to pull out unwanted spaces and characters that result in a reduced file size. You can leverage the following tools for free.
Pull Out Render-Blocking JavaScript
JavaScript is a key element of the modern-day internet and it helps us create interactive, dynamic experience. However, because web browsers are developed to execute and download scripts before they’d have to keep parsing the images and HTML on a given page, scripts require some particular attention to ensure they do not retard your page speed.
In-line JavaScript
If you’ve got some scripts that are pertinent to a specific page, rather than referencing some external JavaScript files, it is most effective practice to have them placed in-line in your HTML docs.
Asynchronous JavaScript
The asynchronous element can be included in any script tag pointing to external script files. This instructs the web browser to keep parsing the HTML doc while scripts are undergoing a download process. The execution will be done once the scripts are completely downloaded.