Github

Forms: validation, styling & semantics

重看新手提示 (需重新載入)
?

Name must be at least 2 words

?

An optional field. This field is only validated when it has a value.
Minimum 5 chars, maximum 15

(optional)
?

This field uses HTML5 "pattern" attribute to be validated.
"\d+" - only digits are allowed

?

Number must be between 10 and 100

?

Should be of length 6 OR 8 characters

?

Notice that for a phone number user can input a '+' sign, a dash '-' or a space ' '

?

Choose something or choose not. what shall it be?

?

This is a multifield, which let the user input a serial number or credit card number for example, and the trick is to validate the combined result, which is stored in a hidden field

There is a hidden "required" form field below, notice it will not be validated due to its lack of visibility.
The reason for this is that sometimes there is a section in a form that is not visible until some user "action" is taken, and changing form fields to be "required" on-the-fly is undesirable.