Magento Defer Parsing of JavaScript

Magento Defer Parsing of JavaScript enables the store to speed up the load time by helping in defer parsing of the Javascript.

Table of Content

1. Extension Installation Guide
2. Configuration
3. Before Implementation of Defer Parsing of JavaScript
4. After Implementation of Defer Parsing of JavaScript

1. Extension Installation

• Upload or copy all folders in the zip package to your Magento root folder. It doesn’t overwrite any existing files but just adds new files to the folder structure.
• Once done, log in your Magento admin panel, go to System > Cache Management, select all caches and refresh.
• Navigate to System > Configuration, if you can see the extension tab, it is installed properly.
• If you get Access denied error, you need to log out admin panel and log in again.

2. Configuration
   To configure the extension, log in to Magento backend, move to System > Configuration > Defer Parsing of JavaScript where you can find various settings to configure the extension.

• Defer Parsing of JavaScript: Enable Defer Parsing of JavaScript extension from here.

3. Before Implementation of Defer Parsing of JavaScript
   If you check any low-speed website in Google PageSpeed, you can see the recommendation for Defer Parsing of JavaScript which is having a low grade.  

4. After Implementation of Defer Parsing of JavaScript
   After implementation of Defer Parsing of JavaScript, you can see the better grade in Google PageSpeed for JavaScript as shown below. The better grade helps in improvement of website load time.