Magento 2 Checkout Validation doesn't work

Question

I've created a module which extends the magento 2 checkout, where I've added another field according with the magento documentation: http://devdocs.magento.com/guides/v2.0/howdoi/checkout/checkout_form.html

This has worked and they are displayed on the frontend, however the validation causes a weird error. If I use:

<item name="validation" xsi:type="array"> <item name="required-entry" xsi:type="string">true</item> </item>

As per the documentation, the field shows an asterisk (showing this is a required field), however upon submitting the form the error doesn't display and it doesn't prevent the form submitting.

Answer 1

May be this will help you.

<item name="telephone" xsi:type="array">
   <item name="config" xsi:type="array">
      <item name="tooltip" xsi:type="array">
         <item name="description" xsi:type="string" translate="true">For delivery questions.</item>
      </item>
   </item>
   <!-- add a validation code at here -->
   <item name="validation" xsi:type="array">
     <item name="validate-digits" xsi:type="string">true</item>
   </item>
   <!-- end of validation -->
</item>

you can also refer this url.

if not work let me know.