How to override _registerJsPrice($price) function in Configurable.php Block in Magento2?

Question

I am trying to override __registerJsPrice($price) function in configurable.php

This function is work when we change swatch.

Path of configurable.php is /opt/lampp/htdocs/magento/vendor/magento/module-configurable-product/Block/Product/View/Type

This is Protected function. so I overrided using preference method

Step 1:- create di.xml file in Folder app/code/Webkul/Hello/etc/

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\ConfigurableProduct\Block\Product\View\Type\Configurable" type="Webkul\Hello\Block\Rewrite\Product\Configurable" />
</config>

Step 2:-create Configurable.php Block file in Folder /magento/app/code/Webkul/Hello/Block/Rewrite/Product

<?php

    namespace Webkul\Hello\Block\Rewrite\Product;

    class Configurable extends \Magento\ConfigurableProduct\Block\Product\View\Type\Configurable
    {
        protected function _registerJsPrice($price)
        {
            return str_replace(',', '.', $price + 11);
        }
    }

I Change return str_replace(',', '.', $price); to return str_replace(',', '.', $price + 11); it mean when i change swatch the price increase by +11 rupees.

I changed this in the core file and the changes were shown but when I override at that time no any charges shown.

Answer 1

Step 1:- create di.xml file in Folder app/code/Webkul/Hello/etc/

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\Swatches\Block\Product\Renderer\Configurable" type="Webkul\Hello\Block\Rewrite\Product\Configurable" />
</config>

Step 2:-create Configurable.php Block file in Folder /magento/app/code/Webkul/Hello/Block/Rewrite/Product

<?php

    namespace Webkul\Hello\Block\Rewrite\Product;

    class Configurable extends \Magento\Swatches\Block\Product\Renderer\Configurable
    {
        protected function _registerJsPrice($price)
    {
        return str_replace(',', '.', $price + 11);
    }
    }