Inputs - specialised text fields

Email

Email must be validated by the browser in order to see if a proper email address has been entered. If they’re not valid, form submission is halted.

URL

URL must be validated by the browser in order to see if a proper URL has been entered. If they’re not valid, form submission is halted.

I tested this with the string "Hello world", which is not a URL.

Search

The search box only differs stylistically from a default text box. The effect is only measurable on Mac.

Telephone

The spec says that browsers should do nothing special because valid phone formats differ so wildly. That may be true and wise, but I’m left wondering why we need this type at all. At the very least they could have forbidden letters in such fields.