Magento 2 Defer JS

For Magento 2 stores, Magento 2 Performance Optimizing is one of the most important factors to make a succes of your webshop. Remember that if you want to keep customers stay longer with you if you bring the great experience during the time they spent on your site. Thus, a fast online store is the ideal one that is more friendly with many visitors as you expect instead of a bad performance of the website.

Many additional technologies are integrated to support Magento 2 performance optimizing such as Varnish, Redis, Nginx and even full page caching solution. Thanks to the existing tools, it is simple for the development team to start the decoupling of functionality, then upgrade new levels of flexibility with the stable compatibility and operability among components. That is the great idea to design the better interface both in the server response time but also in the browser side rendering speeds. After all, you will get big step changes of improving Magento 2 performance and enhance customer experience at your store.

As a normal webshop page, it takes more than 4s to load a product page. Please check below and find the relevant method to speed up the site performance.

Methods to optimize Magento 2 performance

Enable Flat Categories and Products
Merge CSS and JS Files
Content Delivery Network
Caching
Image Optimization
Enable Compression
Reduce Server Response Time
Magento Updates

The above recommendations will definitely speed up your store. One of the things that need to get addressed is the following.

When loading a page, the browser normally loads from top to bottom of the page for entire content. To reduce loading time, we need to minimize the amount of JavaScript by deferring Javascript loading till it needs to be executed. It means that the browser will firstly load everything except for JavaScript and JavaScript is only processed when loading these things is completed.

With Best4Mage Defer JavaScript for Magento 2, significantly improves site loading. This Best4Mage Extension will postpone loading JavaScript to bring Magento 2 based websites better performance and therefore giving customers a more comfortable shopping experience.

You immediately will get better results in Google Pagespeed or GTMetrix

Here some further highlights that will make you realize that this is a must have extension.