Book Image

Less Web Development Essentials

By : Bass Jobsen
Book Image

Less Web Development Essentials

By: Bass Jobsen

Overview of this book

Less is a CSS preprocessor that essentially improves the functionality of simple CSS with the addition of several features. The book begins by teaching you how Less facilitates the process of web development. You will quickly then move on to actually creating your first layout using Less and compiling your very first Less code. Next, you will learn about variables and mixins and how they will help in building robust CSS code. In addition, you'll learn how to keep your code clean and test it by using style guides. We will then move on to the concept of Bootstrapping and the strength of using Less with Twitter Bootstrap. Going one step further, you will be able to customize Twitter's Bootstrap 3 using Less. Finally, you will learn how to integrate Less into your WordPress themes and explore other web apps that use Less. By leveraging this powerful CSS preprocessor, you will be able to consistently produce amazing web applications while making CSS code development an enjoyable experience.
Table of Contents (15 chapters)
Less Web Development Essentials
About the Author
About the Reviewers

Nested rules

You will use the layout example from Chapter 2, Using Variables and Mixins, to study nesting of rules in more detail.

To do this, you must first open http://localhost/index.html in your browser and then open less/sidebar.less in your text editor.

Anchors are added to the menu items. This means that the HTML code of the side menu now looks like the following code:

<aside id="sidemenu">
  <h2>Side menu</h2>
      <li><a href="page1.html">item 1</a></li>
      <li><a href="page2.html">item 1</a></li>

You need a selector for each rule to style the different elements in CSS as can be seen in the following code:

#sidebar h2{
  color: black;
  font-size: 16px;
#sidebar ul li a{
  text-decoration: none;
  color: green;

As you can see, both the ul (including the li element and the a anchor) element and the h2 element are the children of the aside element with the #sidemenu ID. CSS...