You want to restrict phone number field and it should accept only 10 digits number then need to create custom validator addRule.
I have created custom module with custom validator rule for make custom Phone Number validation.
File path:
magento/app/code/Vendor/PhonenumverValidation/registration.php
<?php
use \Magento\Framework\Component\ComponentRegistrar;
ComponentRegistrar::register(ComponentRegistrar::MODULE, 'Vendor_PhonenumverValidation', __DIR__);
File path:
magento/app/code/Vendor/PhonenumverValidation/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_PhonenumverValidation" />
</config>
File path:
magento/app/code/Vendor/PhonenumverValidation/view/adminhtml/web/js/validation-custom.js
require([
'Magento_Ui/js/lib/validation/validator',
'jquery',
'mage/translate'
], function(validator, $){
validator.addRule(
'phonenumber-tendigit',
function (value) {
return value.length > 9 && value.length < 11 && value.match(/^\d{10}$/);
},
$.mage.__('Please specify a valid 10 digits mobile number')
);
});
File path:
magento/app/code/Vendor/PhonenumverValidation/view/adminhtml/ui_component/customer_address_form.xml
<?xml version="1.0" encoding="UTF-8"?>
<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd" component="Magento_Customer/js/form/components/form">
<fieldset name="general">
<field name="telephone" sortOrder="130" formElement="input">
<settings>
<dataType>text</dataType>
<visible>true</visible>
<label translate="true">Phone Number</label>
<validation>
<rule name="phonenumber-tendigit" xsi:type="boolean">true</rule>
</validation>
</settings>
</field>
</fieldset>
</form>
File path:
magento/app/code/Vendor/PhonenumverValidation/view/adminhtml/layout/customer_index_edit.xml
<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="admin-2columns-left"
xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
<head>
<link src="Vendor_PhonenumverValidation::js/validation-custom.js"/>
</head>
</page>
Hope it help!