Magento2: How can I create a validation for telephone inputs inside Magento Admin?

Question

I have to create a validation for the telephone inputs in Magento Admin. I need to set a min of characters like 8 and a max of 15. I'm currently using 2.2.8 version.

I tried to set the validation by admin using telephone attribute, but it didn't work. It inserts a class for validation but doesn't validate at all.

Thanks!

Answer 1

Put the following code inside the telephone number block in your layout file

 <item name="validation" xsi:type="array">
    <item name="min_text_length" xsi:type="number">8</item>
    <item name="max_text_length" xsi:type="number">15</item>
    <item name="validate-number" xsi:type="number">0</item>
 </item>