CSS :out-of-range
One aspect of web development I've always loathed was working with forms. Form elements have been traditionally difficult to style due to OS and browser differences, and validation can be a nightmare. Luckily the native HTML APIs added methods for improving the form validation situation.
With input[type=number] elements, you can add min and max attributes. Those attributes are great but the browser doesn't display distinct error styles if those numbers are out of range. Luckily we have :out-of-range:
/* matches when number is not within min and max */
input[type=number]:out-of-range {
border-color: red;
}
Thanks to CSS :out-of-range, developers can style input elements based on its valid value status. Despite the HTML validation and styling, you must still do server side validation; honestly, you probably also want to do JavaScript validation here too.
![Regular Expressions for the Rest of Us]()
Sooner or later you'll run across a regular expression. With their cryptic syntax, confusing documentation and massive learning curve, most developers settle for copying and pasting them from StackOverflow and hoping they work. But what if you could decode regular expressions and harness their power? In...
![Write Simple, Elegant and Maintainable Media Queries with Sass]()
I spent a few months experimenting with different approaches for writing simple, elegant and maintainable media queries with Sass. Each solution had something that I really liked, but I couldn't find one that covered everything I needed to do, so I ventured into creating my...
![CSS :target]()
One interesting CSS pseudo selector is :target. The target pseudo selector provides styling capabilities for an element whose ID matches the window location's hash. Let's have a quick look at how the CSS target pseudo selector works!
The HTML
Assume there are any number of HTML elements with...
![Highlight Table Rows, Columns, and Cells Using MooTools 1.2.3]()
Row highlighting and individual cell highlighting in tables is pretty simple in every browser that supports :hover on all elements (basically everything except IE6). Column highlighting is a bit more difficult. Luckily MooTools 1.2.3 makes the process easy.
The XHTML
A normal table. The cells...
What would be a use-case for this rather than using :invalid ?