Magento 2: How to add store code to body class in multi store view?

In some cases, you will need to add a class to the body tag of your Magento stores. To process it, you’ll need to set-up an event observer for the layout_render_before event.

1. Create file events.xml on app/code/Magemonkeys/Addbodyclass/etc/frontend

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
  <event name="layout_render_before">
     <observer instance="Magemonkeys\Addbodyclass\Observer\Frontend\Layout\LoadBefore" name="add_bodystorecode_class_observer"/>
  </event>
</config>

<?xml version="1.0" ?>

</event>

</config>

2. Create file LoadBefore.php on app/code/Magemonkeys/Addbodyclass/Observer/Frontend/Layout

<?php
namespace Magemonkeys\Addbodyclass\Observer\Frontend\Layout;
 
use Magento\Framework\Event\Observer;
use Magento\Framework\View\Page\Config;
use Magento\Store\Model\StoreManagerInterface; 

class LoadBefore implements \Magento\Framework\Event\ObserverInterface
{
   protected $storeManager;

   public function __construct(
       Config $config,
       StoreManagerInterface $storeManager
   ) {
       $this->config = $config;
       $this->storeManager = $storeManager;
   }
 
   public function execute(Observer $observer)
   {
       $store = $this->storeManager->getStore();
       $storeCode = $store->getCode();
       $websiteCode = $store->getWebsite()->getCode();
       $this->config->addBodyClass($storeCode);
       $this->config->addBodyClass($websiteCode);
   }
}

<?php

namespace Magemonkeys\Addbodyclass\Observer\Frontend\Layout;

use Magento\Framework\Event\Observer;

use Magento\Framework\View\Page\Config;

use Magento\Store\Model\StoreManagerInterface;

class LoadBefore implements \Magento\Framework\Event\ObserverInterface

{

protected $storeManager;

public function __construct(

Config $config,

StoreManagerInterface $storeManager

) {

$this->config = $config;

$this->storeManager = $storeManager;

}

public function execute(Observer $observer)

{

$store = $this->storeManager->getStore();

$storeCode = $store->getCode();

$websiteCode = $store->getWebsite()->getCode();

$this->config->addBodyClass($storeCode);

$this->config->addBodyClass($websiteCode);

}

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