Rocket Java Script

by Magefan


Magento Platform
Open Source (CE)
2.1, 2.2, 2.3
Commerce using on prem (EE)
2.2, 2.3
Commerce on Cloud (ECE)
2.2, 2.3

Tech Specifications

Current Version:
Stable Build
16 December, 2019
Extensions, Content & Customizations, Personalization & Experience Management
Supported Browsers:
Chrome Linux: 42, 43, 44 Mac: 39, 44 Windows: 39, 40, 42, 43, 44 Firefox Linux: 31, 38, 39, 40, 41 Mac: 31, 38, 39, 40, 41 Windows: 31, 38, 39, 40, 41 Opera Linux: 7, 7.1, 8, 9 Mac: 7, 7.1, 8, 9 Windows: 7, 7.1, 8, 9 Safari Linux: 7, 7.1, 8, 9 Mac: 7, 7.1, 8, 9 Windows: 7, 7.1, 8, 9 Edge Windows: 42 IE Windows: 10, 11, 8, 9
License Type:


Our Rocket Java Script extension allows you to enable deferred JS loading on your Magento store.

Other Extensions by Magefan


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Rocket Java Script is an extension by Magefan that helps to defer JavaScript loading for Magento sites to speed up quickly.

According to the extension, all JS code automatically moves to the bottom of the page where it is placed before body tag end. This speeds up page loading and increases the page load speed which reasonably influences the position of your website in Google. Effectively improving loading time you attract more customers and boost your sales.



Strongly Defer JavaScript For Your Websites

JavaScript (JS) is often in between the head and body. Furthermore, 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. The extension strongly optimizes customers’ experience by deferring JavaScript until it is needed on your website.


Easily Configured From The Admin Panel

With a few clicks, you can get Magento 2 JavaScript extension work on your online store for better speed performance. The easy features with Magento basis save your time to get used to it.


Developed For Magento 2

Magefan Developers have conducted a few tests to make sure the Magento 2 JavaScript extension is fully compatible with Magento 2 and doesn't cause any malfunctions. You can be sure the extension doesn't conflict with any functions on the Magento 2 Platform.


Sharply Improve Your Site Productivity

The speed of your wedsite loading immensely influences your website position on Google. And since using Magento 2 Javascript extension and increasing the website loading speed provides you with more amount of users and potential customers the success of your business depends on it. 

Release Notes

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  • Compatible with Open Source (CE) : 2.1 2.2 2.3
  • Compatible with Commerce using on prem (EE) : 2.2 2.3
  • Compatible with Commerce on Cloud (ECE) : 2.2 2.3
  • Stability: Stable Build
  • Description:

    Bug Fixes:

    - The issue with Deferred JavaScript on the large configurable product pages


  • Compatible with Open Source (CE) : 2.1 2.2
  • Stability: Beta Build
  • Description:

    Added JavaScript Bundling Optimization


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The best place to start if you need help with a specific extension is to contact the developer. All Magento developers have both a contact email and a support email listed.

Q & A

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