December 2013
Intermediate to advanced
480 pages
14h 11m
English
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Customizing the Validation Error Style
By default, invalid HTML fields in a form appear with a red border. For example, if you submit an HTML form without entering a value in a required field then the field is displayed with a red border.
You can customize the appearance of form fields in different states of validity by using the following Cascading Style Sheet pseudo classes:
:valid—Applies when an input element is valid
:invalid—Applies when an input element is invalid
:required—Applies when an input element is required (has the required attribute) ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.