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    How to add custom validation in store configuration field

    Updated 28 April 2023

    In this article, We will learn about how to add custom validation in store configuration field.

    First off, We will create a module.

    Step-1: Create requirejs-config.js in  app/code/Vendor/Validation/view/adminhtml

    var config = {
        config: {
            mixins: {
                'mage/validation': {
                    'Vendor_Validation/js/admin-config/validator-rules-mixin': true

    Step-2: Create validator-rules-mixin.js in  app/code/Vendor/Validation/view/adminhtml/web/js/admin-config

       ], function ($) {
           'use strict';
           return function (target) {
                   function (value) {
                      if(value.includes('http') || value.includes('https')) {
                       return false;
                      } else {
                       return true;
                   $.mage.__('Please enter server name without protocol')
               return target;

    Step-3: Create system.xml in app/code/Vendor/Validation/etc/adminhtml and then add custom rule.

    <?xml version="1.0"?>
    <config xmlns:xsi="" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
            <group id="server_config" translate="label" type="text" sortOrder="2" showInDefault="1" showInWebsite="1" showInStore="1">
            <field id="host_name" translate="label comment" type="text" sortOrder="1" showInDefault="1" showInWebsite="1" showInStore="0" >
                <validate>required-entry validate-server-protocol</validate>

    Hope this will help you.

    Thanks 🙂

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