I want to override or update core validation for magento frontend form like as checkout page form address field validation change. https://i.stack.imgur.com/Q8nw2.png

need to change the core validation

1 Answer 1


You must use this:

1) In input or select tag add our validaion with this code

data-validate="{required:true, 'validate-custom-name':true}"

2) Add js validation for “Validate-custom-name”

<script type="text/javascript">
require(['jquery', // jquery Library
    'jquery/ui', // Jquery UI Library
    'jquery/validate', // Jquery Validation Library
    'mage/translate' // Magento text translate (Validation message translte as per language)
], function($) {
    $.validator.addMethod('validate-custom-name', function(value) {
        return (value !== 'test'); // Validation logic here
    }, $.mage.__('Enter Valid name'));
  • I need to core validation change. like as phone no validation change..please see update image. please share full answer..thanx a lot. Feb 21, 2017 at 5:04
  • yeah, exactly! you want to change the validation message, like on phone number field, you want to show Phone number is required, then you can use the above mentioned method only..
    – Manish Joy
    Feb 21, 2017 at 5:12
  • which file in change?? i need in my custom module. Feb 21, 2017 at 5:13
  • use first code in the file where the element tag is. and use second code wherever you can run a jQuery code (like phtml etc.) but it is highly recommended to use a js file.
    – Manish Joy
    Feb 21, 2017 at 5:15
  • I know this work for custom form..can you share full code?? webmull.com/magento-2-add-new-custom-form-validation Feb 21, 2017 at 5:49

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