Do HTML Comments Affect Performance?

Leaving comments in your HTML documents makes it easier to edit and debug your code. But does it also have a negative effect on the speed of your website?

Can You Mix CSS and HTML?

Is it possible to mix HTML markup and CSS style sheets in the same document? And if the answer is yes, when is it a good idea to do so?

Is HTML Case Sensitive?

Do you want to know if tags and attributes in HTML are case insensitive? We have the answer for you, so read on.

How to Preview an HTML File

Learn how to preview an HTML document in your browser, as well as how to view the source code of that document in your text editor.

Is CSS Harder Than HTML?

Wondering if writing CSS style sheets is harder than HTML markup? We have the answer for you, and more.

How to Use CSS With PHP

Learn about the different ways to add Cascading Style Sheets (CSS) to your website using PHP—with code samples.

How Much CSS Is Too Much?

Let’s talk about Cascading Style Sheets (CSS) performance, and the dos and don’ts of writing CSS that doesn’t slow your site down.

Is CSS Hard to Learn?

Why Cascading Style Sheets (CSS) is easier to learn than most people think. And why it’s quite hard to master.

How to Prevent CSS Override

Having trouble with other CSS rules overriding yours? Here’s why this is happening—and what you can do about it.

Why Is CSS So Hard?

Many web developers find Cascading Style Sheets (CSS) hard. So let’s talk about what you need to know to make it easy.

Is CSS a Programming Language?

When you write CSS, do you write code or do you program an application? Here’s why the answer isn’t a clear-cut yes or no.