Defer JavaScript for Magento 2

Magento 2 Defer JavaScript Extension by BSSCommerce improves Magento store performance by automatically deferring your JavaScript loading. Effectively reduce loading time and engage more customers to enhance sales amount.
  • Instantly and automatically defer parsing of Javascript
  • Defer Javascript till the last moment
  • Defer Iframes loading effectively
  • Magically improve pagespeed score!
2.0.x - 2.1.x

2.0.x - 2.1.x

Availability: In stock

Regular Price: $75.00

Special Price $50.00

sales off weekend and multiple discount

Magento 2 Defer JavaScript Extension by BSSCommerce automatically puts JavaScript files to the end of the page after loading all HTML and CSS.

We also provide Magento 2 Lazy Load Extension that can allow Magento sites to load images as scrolls to reduce loading time: Check it out HERE! 

Key Features

Magento 2 Defer JavaScript Extension by BSSCommerce will never disappoint you with special features: 

  • Powerfully defer parsing of JavaScript

magento 2 defer javascript - page speed after installing

Oftentimes, JavaScript (JS) is in between <head></head> and <body></body>. Moreover, a website is loaded from top to bottom. If you have a lot of JavaScript code or a long string of code there, it takes very long before the web content appears because it needs to wait until all JavaScript codes are finished.

magento 2 defer javascript - page speed before installing

The extension powerfully optimizes customers’ experience by deferring the parsing of JavaScript until it is needed on your Magento 2 based website. It reduces the number of bytes required to speed up the content of the page to load the initial state of the page. Moreover, it permits remaining bytes to be loaded asynchronously in the background.

  • Defer Iframes loading effectively

Defer Iframes loading means that the browser will finish loading you website before loading Iframes of other sites that are embed on your webpage. The reason is that when these sites are embed on your site, the browser will load JavaScript files of these pages, which can slow down your webpage. 

  • Easily configure from admin panel

With a few clicks, you can get this extension work on your online store for better speed performance. Just as easy like a piece of cake, you can optimize your Magento 2 webpage speed within half a second by only a few clicks. The easy and familiar features with Magento basis save your effort and time to get used to with it.


  • Cleverly developed on the Magento 2 Platform

The Magento 2 Defer JavaScript by BSSCommerce possesses all excellent features from the Magento 1 version. After thorough tests by BSSCommerce Certified Developers, the extension takes pride not to conflict with any existing functions on the Magento 2 Platform. The extension is especially well compatible with Magento version 2.x.

Why is Magento 2 Defer JavaScript Extension by BSSCommerce your must-have extension?

40% of people abandon a website that takes more than 3 seconds to load. A tick of delay can cost you a potential customer. Forever!

You understand the importance of website loading time, but your Magento 2 web-based cannot meet your requirement.Defer Parsing JavaScript for Magento 2 deserves for being an essential part of your Magento 2 site.

Magento 2 Defer JavaScript by BSSCommerce, inheriting from the outstanding features of Defer JavaScript for Magento version 1, now is totally developed on the Magento 2 platform. The extension especially expresses its brilliant features on the Magento version 2.0.

  • Dramatically improve your Magento site performance

The fact that scripts must be downloaded, parsed, and executed before the browser can begin to render a web page causes much time-delay on loading the main page. In the world of online e-commerce, inefficiency costs money. Even one second delay in your site response time can turn a target customer to a loyal customer or let them simply leave your site to the competitor’s site. Slow loading time, caused by JavaScript can be one of the fastest ruin of a possible sale. This is how BSS defer Javascripts can make change to your site (result generated by GTmetrix)

BSS Defer JavaScript for Magento 2 is developed to solve out this issue. It allows optimizing your Magento store performance quickly and easily.

  • Defer JavaScript until the last moment

With Magento 2 Defer Javascript by BSSCommerce, the other HTML files and CSS will be loaded first then parsing of JavaScript files is implemented right after that. It just merely rearranges the order of loading process so that JavaScript is deferred until the last possible moment. This seems to cause no effect on the performance of your web page, but the outcome of this process is that your page appears much quicker, and the customer can satisfy with your site speed more than other competitors.

  • v2.0.2

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    User Guide-Defer JavaScript for Magento 2
    Installation Guide-Defer JavaScript for Magento 2
    30-Day Money Back
    Free 1-Year Support
    Free Lifetime Update
    Free Installation


      • Super useful
        From 0/100 in Gmetrix, my site load was 100/100 after installing Defer JavaScript. For $50, this extension is beyond expectation.

        30 June 2016

        Alex Weber
      • Worth a try!
        It is exactly the answer for my trouble. Now my site has been improved and attract more customers. I am really pleased with it.

        24 March 2016

      • Highly appreciate!
        A really wonderful extension I can find. Highly appreciate. Keep moving forward!

        22 March 2016

      • Good service!
        I love the way you support me. Very enthusiastic and professional!

        16 March 2016

      • You rock!
        It is incredible! The effect is beyond my expectation! You have really done a great job!

        15 March 2016

      • Compliments to the developers!
        My site has speeded up a lot. Your extension worked absolutely well.

        09 March 2016

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