Validating text field
You can do and impressive amount of form validation with just HTML attributes.You can make the user experience pretty clean and clear with CSS selectors.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.
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'.With new features like this, (and the like), you can also client-side validate things like length (e.g.
minimum password length or maximum characters in bio textarea) and even go full-on regex. Say you wanted password requirements like stuff here, which makes this not work great in Firefox and IE. Feel free to pick and choose stuff from here that works for you.
The value, clicking 'down' with the input blank will result in a very large number. The examples posted in these responses are vastly oversimplified when compared against reality.