How to make a field mandatory with code?

Store Design
1

Hi, I want to know how to make any field mandatory.

I want the code that if you add it will make the field mandatory.

Thank you

2

@Yousif77

which form field will be mandatory? Please share your form name and also share the store URL!
I can help you!
Thanks!

3

Hi, I want to make the Name and Message field required.

4

@Yousif77

Please share your store URL!

Thanks!