How to add custom validation rule to billing address field Magento 2

Question

I am using magento 2.1.7. I have added vat field to billing address form. I want to add custom field validation. i have added below code.

Added below validation to phtml file

But my custom validation not working. Magento required field validation is working fine. Can anyone help me.

@sri as per given answer i have override rules js file. add your custom validation to override js file — Prashant Valanda, Jul 12, 2018 at 15:47

Prashant Valanda · Accepted Answer · 2018-02-27 16:01:16Z

3

Override rules.js using below code in my custom module

app/code/Test/Custom/view/frontend/requirejs-config.js

var config = {
    "map": {
        "*" : {
            'Magento_Ui/js/lib/validation/rules' : 'Test_Custom/js/validation/rules'
        }
    }
};

created js file at app/code/Test/Custom/view/frontend/web/js/validation/rules.js

Run php bin/magento setup:static-content:deploy command.

answered Feb 27, 2018 at 16:01

Prashant Valanda

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great, it works! Haven't you found another way without override rules.js?
– LucScu
Aug 6, 2018 at 10:20
There is mixin concept but that is not working in my case. Please try with mixin
– Prashant Valanda
Aug 7, 2018 at 6:25
yes, i could try to override rules.js, thx very much
– LucScu
Aug 7, 2018 at 16:51

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