Conditional options in CSS have a variety of benefits but can also bring the same deficiencies as CSS variables in that they alter the state of CSS as it is. Many of the cons have to do with efficiency, confusion and, in some cases, added HTTP requests (because it deals with a type of server-side programming language).

Nonetheless, let’s look into more of the benefits of conditional CSS statements. Just keep in mind the cons that come with them, and always be thinking of new ideas to overcome them. So far, the tools and solutions that give developers and designers conditional statements in CSS have come to be relatively well accepted. This is because CSS conditionals seem to solve bigger problems in CSS, and the lack of efficiency seems minor by comparison.

Let’s not forget the original CSS conditional. The problem with the traditional CSS conditional for IE, however, is that it has no else or else if. Although the use may be limited, an if/else statement for CSS could allow designers and developers to specify styles for other types of conditions: browsers, for example.

One popular tool for calling styles according to browser type is Conditional-CSS.com. While many other solutions are out there for conditionals as well as this particular problem, this tool can do most of the work automatically, with minimal confusion. Read more…

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Developers can easily see the benefit of using variables to code their Web apps, so seeing the benefit of variables in CSS is just as easy. Are they needed though? Before we answer a tough question like this, let’s go over what they are and how both designers and developers can use them.

Similar to a programming language, CSS variables can be used to define style sheet-wide values with one descriptive word. This one word can then be used repeatedly throughout the style sheet to use the value assigned to it. The point of variables is to save time and, in most cases, create more efficient code. An example of the idea in practice is below. Read more…

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We can group selectors using a comma (,) separator. The following declaration block will apply to any element that matches either of the selectors in the group:

td, th {
  ? declarations
}

We can think of the comma as a logical OR operator, but it’s important to remember that each selector in a group is autonomous. A common beginner’s mistake is to write groups like this: Read more…

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