How to require a form's input value to be at least 3 characters long?

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1

I have a contact form in magento 2, and I want validate field of form requires enter at least 3 character and not allow empty?

i using this but only work with not allow empty function. How I can do it

Thanks

2

You should use the validate-length validator with minimum-length-<value> parameter.

The core does not contain a *.phtml file example for minimum-length-<value>, but does contain for maximum-length-<value>, it is similar:

3

Hi @dmitrii_fediuk, thanks for your help, I got it, nice guide