Peter Bridger Peter Bridger - 10 months ago 71
CSS Question

Is it possible to create inline pseudo styles?

Is it possible to create inline pseudo styles?

For instance, can I do something like the following?

<a href="#" style="background-color:green;{hover:background-color:red;}">Coding Horror</a>

The reason behind this is I'm developing a .NET library that creates UI elements. I want to produce HTML elements that can have their hover state set without the use of an external style sheet.

Answer Source

Unfortunately no, you can't implement hover effects using inline CSS.

A (poor) work-around for this problem is to have your controls render style blocks when they are rendered. For example, your control could render as:

<style type="text/css">
    .custom-class { background-color:green; }
    .custom-class:hover { background-color:Red; }
<a href="#" class="custom-class">Coding Horror</a>

If you could force your users to drop a "style control" at the top of their pages you could render all your custom classes there instead of rendering them next to each control, which would be a very, very bad thing (browsers will restart rendering every time they come across a style block, having a lot of style blocks scattered around your page will cause slow rendering).

Unfortunately there's no elegant solution to this problem.