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This article mainly introduces what Less is in web development, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand it.

What is Less?

Less is an extended and dynamic stylesheet language for CSS, CSS preprocessor, which can be run on the client or server side to help us customize, manage and reuse web stylesheets.

Less is an open source language and a cross-browser compatible language.

What is a CSS preprocessor?

Css preprocessor

CSS preprocessor is a scripting language and an extension of CSS. It is compiled into the regular CSS syntax and the CSS is then read by the Web browser. Rarely looks very similar to CSS, but it provides features such as variables, functions, blending, and manipulation to help you build dynamic CSS.

Both Less and SASS are examples of CSS preprocessors because they are compiled and generate CSS syntax read by Web browsers.

How to use Less?

Less is written in JavaScript and needs to run a Node.js or Web browser. We can include Less.js in the site, which compiles all linked .less stylesheets in real time.

Advantages and disadvantages of Less

Advantages and disadvantages of Less

Advantages:

1. Less is a CSS preprocessor. When compiled, it generates a simple CSS for browsers.

2. Less supports cross-browser compatibility.

3. Because Less uses nesting, the code is shorter, cleaner, and organized in a specific way

4. Because Less uses variables, maintenance can be implemented more quickly.

5. Less provides a series of operators to make coding faster and more time-saving.

6. Less provides the @ mport rule so that we can easily work with external files. Note: import is necessary because many people split the stylesheet into multiple files instead of putting it in a single file.

7. Less provides merge properties. The most exciting feature of Less is its acceptance of multiple values, such as transform,transition and box-shadow.

8. Less is written in JavaScript and can be compiled faster than other preprocessors of CSS.

Disadvantages:

1. If we are not familiar with CSS preprocessing, we must spend some time learning about Less.

2. Compared with earlier preprocessors such as SASS, which includes frameworks such as Compass,Gravity and Susy, Less provides fewer frameworks.

3. In Less, there is tight coupling between modules, so it takes more effort to reuse and / or test related modules.

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