Other HTML5 input types include: -related options do have an effect at least in Opera, with pop-up calendars and other devices appearing to assist with input. But as you see, lots of strange looking URLs are actually valid.
Fortunately, we can assume that all browsers supporting HTML5 form validation techniques will also support images being replaced in the CSS by 'Base64 encoded datasets'. When you select a “tel” or “email” field on your mobile browser, it could open your address book for you to pick a phone number or address from.
Obviously neither example is very limiting, but it will prevent people from entering completely wrong values, such as phone number, strings with multiple '@'s or spaces.
Here is how it appears in Safari (with our CSS formatting to show the (in)valid state): In a similar fashion to the Again, the input box appears as normal: This time the minimum requirement for most browsers is one or more letters followed by a colon. :[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f] | \[\x01-\x09\x0b\x0c\x0e-\x7f]) ) \])\z Or you can look here for more solutions.
For these examples we have created our own valid/invalid CSS formatting to override the browser default. That's why you may see something like the following: Before you type anything into the box a red marker is shown.
As soon as a single character has been entered this changes to a green marker to indicate that the input is 'valid'.