Which HTML5 attribute could you use with the email input to require a value?

Which HTML5 attribute could you use with the email input to require a value?

• A. pattern
• B. placeholder
• C. maxlength
• D. required

Answer: (D)

HTML5 form validation lets you enforce input rules directly in the browser. The attribute that makes a field mandatory is required. When you attach it to an email input, the user cannot submit the form until a value is provided and that value passes the type check for an email format. This combines presence validation with the built-in format validation of the email type. Other attributes serve different purposes: pattern requires the value to match a specific regular expression but doesn’t by itself force input; placeholder is only a hint shown in the field; maxlength restricts how many characters can be entered but doesn’t compel the user to enter anything.

HTML5 form validation lets you enforce input rules directly in the browser. The attribute that makes a field mandatory is required. When you attach it to an email input, the user cannot submit the form until a value is provided and that value passes the type check for an email format. This combines presence validation with the built-in format validation of the email type. Other attributes serve different purposes: pattern requires the value to match a specific regular expression but doesn’t by itself force input; placeholder is only a hint shown in the field; maxlength restricts how many characters can be entered but doesn’t compel the user to enter anything.