In order to override JS validation class you need to create a new module
app/code/local/Vendor/OverrideCore/etc/module.xml
<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
<module name="Vendor_OverrideCore" setup_version="0.1.0" />
</config>
app/code/local/Vendor/OverrideCore/composer.json
{
"name": "vendor/overridecore",
"description": "Override Core for Magento 2",
"require": {
"php": "~5.5.0|~5.6.0|~7.0.0"
},
"type": "magento2-module",
"version": "0.1.0",
"authors": [
{
"name": "Vendor",
}
],
"autoload": {
"files": [
"registration.php"
],
"psr-4": {
"Vendor\\OverrideCore\\": ""
}
}
}
app/code/local/Vendor/OverrideCore/registration.php
<?php
\Magento\Framework\Component\ComponentRegistrar::register(
\Magento\Framework\Component\ComponentRegistrar::MODULE,
'Vendor_OverrideCore',
__DIR__
);
Inside your new module create those folders:
app/code/local/Vendor/OverrideCore/view/frontend/web/
app/code/local/Vendor/OverrideCore/view/frontend/web/js/
Create this file app/code/local/Vendor/OverrideCore/view/frontend/web/requirejs-config.js
:
/*jshint browser:true jquery:true*/
/*global alert*/
var config = {
map: {
'*': {
'mage/validation': 'Vendor_OverrideCore/js/validation',
'mage/validation/validation': 'Vendor_OverrideCore/js/validation',
passwordStrengthIndicator : 'Vendor_OverrideCore/js/password-strength-indicator'
}
}
};
Create this file app/code/local/Vendor/OverrideCore/view/frontend/web/js/password-strength-indicator.js
:
https://github.com/magento/magento2/blob/develop/app/code/Magento/Customer/view/frontend/web/js/password-strength-indicator.js
Create this file app/code/local/Vendor/OverrideCore/view/frontend/web/js/validation.js
:
https://github.com/magento/magento2/blob/develop/lib/web/mage/validation/validation.js
Enable module
php bin/magento module:enable Vendor_OverrideCore