How to eliminate render-blocking resources
Posted: Mon Apr 21, 2025 10:48 am
Over time, web developers have experimented with various methods to reduce or eliminate render-blocking resources. Today, there are several reliable techniques for speeding up page rendering.
Optimize JavaScript loading
JavaScript is one of the most common culprits when it comes to rcs data thailand render-blocking. Fortunately, there are several techniques you can use to control how and when your scripts load, so your page can render faster.
1.1. Understanding Async vs. Defer
To prevent JavaScript files from blocking page rendering, you must use the DEFER or ASYNC attributes in your script tags.
DEFER downloads the script while the page is rendering and executes it only after the HTML is fully parsed. It preserves the order of the scripts.
ASYNC downloads and executes the script as soon as it is ready, regardless of the page's rendering state. This can cause scripts to run out of order.
Generally, DEFER is the best choice, especially when your scripts depend on each other or the DOM. It allows the browser to focus on rendering the page before executing scripts.
Optimize JavaScript loading
JavaScript is one of the most common culprits when it comes to rcs data thailand render-blocking. Fortunately, there are several techniques you can use to control how and when your scripts load, so your page can render faster.
1.1. Understanding Async vs. Defer
To prevent JavaScript files from blocking page rendering, you must use the DEFER or ASYNC attributes in your script tags.
DEFER downloads the script while the page is rendering and executes it only after the HTML is fully parsed. It preserves the order of the scripts.
ASYNC downloads and executes the script as soon as it is ready, regardless of the page's rendering state. This can cause scripts to run out of order.
Generally, DEFER is the best choice, especially when your scripts depend on each other or the DOM. It allows the browser to focus on rendering the page before executing scripts.