README

The module moves javascripts to the bottom of the page.

Installation Guide

Install by composer

composer require hryvinskyi/magento2-deferjs
bin/magento module:enable Hryvinskyi_Base
bin/magento module:enable Hryvinskyi_DeferJs
bin/magento setup:upgrade

Install download package

1. Download module https://github.com/hryvinskyi/magento2-base "Clone or download -> Download Zip"
2. Download this module "Clone or download -> Download Zip"
3. Unzip two modules in the folder app\code\Hryvinskyi\Base and app\code\Hryvinskyi\DeferJs
4. Run commands:

bin/magento module:enable Hryvinskyi_Base
bin/magento module:enable Hryvinskyi_DeferJs
bin/magento setup:upgrade

1. Configure module in admin panel

General Settings

To get the access to the 'Defer JavaScripts' settings please go to Stores -> Configuration -> Hryvinskyi Extensions -> Defer JavaScripts and expand the General Settings section.

Enabled deferred javascript: Enable or disable the extension from here.
Disable move attribute: Enter the attribute that will block the move of the script to the bottom.
Enabled minify body scripts: Enable script minification.

Features

• Ability to skip javascripts with a special tag that can be set in the admin panel

• Built-in skipping move Google tag manager (If you use a third-party module and can not add a special tag)

• Exclude by controllers from defer parsing of JavaScript.

  Controller will be unaffected by defer js. Use like: [module][controller][action] (Example: cms_index_index)

• Exclude by store paths from defer parsing of JavaScript.

  Paths will be unaffected by defer js. Use like: /women/tops-women/jackets-women.html

• Exclude by url pattern from defer parsing of JavaScript.

  URL pattern can be a full action name or a request path. Wildcards are allowed. Like:

  *cell-phones*
  *cell-phones/nokia-2610-phone.html
  customer_account_*
  /customer/account/*
  *?mode=list
  

• Minification of moved javascripts

• Optimize text/x-magento-init scripts

• Ability to extend the module with your validator

• Increased rendering time improves the Google Page Speed score.

Add custom validator

To add your validator:

1. Create Validator file app/code/Vendor/Module/Model/PassesValidator/Validators/YourValidator.php:

   <?php
   
   declare(strict_types=1);
   
   namespace Vendor\Module\Model\PassesValidator\Validators;
   
   use Hryvinskyi\DeferJs\Model\PassesValidator\ValidatorInterface;
   use Magento\Framework\App\Response\Http;
   
   /**
    * Class YourValidator
    */
   class YourValidator implements ValidatorInterface
   {
       /**
        * Validator function, handle javascript or not
        *
        * @param string $script
        * @param Http $http
        *
        * @return bool
        */
       public function validate(string $script, Http $http): bool
       {
           // Your code validate
       }
   }

2. Create Dependency Injection file app/code/Vendor/Module/etc/frontend/di.xml:

   <?xml version="1.0"?>
   
   <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
   
       <virtualType name="deferJsPassesValidators">
           <arguments>
               <argument name="entityTypes" xsi:type="array">
                   <item name="yourValidationName"
                         xsi:type="object">Vendor\Module\Model\PassesValidator\Validators\YourValidator</item>
               </argument>
           </arguments>
       </virtualType>
   </config>

3. Run command:

   php bin/magento setup:di:compile