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

Built-in functions

Less supports many handy built-in functions. A built-in function can be used to manipulate Less values inside mixins and set the variables' values. Last but not least, they can also be used in guard expressions. You will find the complete list of functions by visiting

In this chapter, you won't find them all, but you will learn how to use functions from all different groups. Functions can be grouped based on their input and output types, where these types are mathematical functions, color functions, list functions, string functions, and type functions. There is also a small number of functions that can't be grouped using the preceding classification.


Less functions map native JavaScript functions and code in the first place because of the fact that Less has been written in JavaScript. Currently, JavaScript expressions can still be evaluated as values inside Less code, but this ability may be removed in future versions. JavaScript...