The url Type

<input type=url>

Firefox 4+	Safari 5+	Safari iOS 3.1+	Chrome 10+	Opera 10.6+	IE 10+	Android 2.3+

The Low Down

The url input type is for absolute URLs, which, but definition, always include a protocol.

• Safari, Chrome, Opera, Android and Firefox all simply require a single letter plus a colon: a: is valid. IE requires at least 2 letters before the colon. No browser requires a common protocol like http, https or ftp, or even //.
• Mobile Safari does no validation, but brings up a keyboard which features an [/] and [.com] key, and removes the space key. Android, up to at least4.3, does not give users an URL specific keyboard.
• If invalid, Firefox, Chrome, and IE provide an error message. Opera gives the element focus with no verbiage. Safari (Currently 7) does not provide constraint validation on form submission.
• Cross browser verbiage:
  • Firefox: Please enter a URL.
  • Chrome: Please enter a URL.
  • IE: You must enter a valid URL
• To ensure a particular protocol, use the pattern attribute
• To not require a protocol,we’ll be able to use the text input type with the inputmode attribute to at least get the best keypad in supporting browsers