Description of cascading variables in CSS

In the world of web design, cascading variables (Cascading Variables) in CSS have become one of the essential and attractive tools. These variables help web designers style their work in a systematic and repetitive manner, making the management and maintenance of CSS files much simpler. Now read on and see how you can benefit from these new and attractive capabilities.

In general, CSS is a language for defining the style of web pages, and in it, developers can utilize different features to create their desired designs. However, managing these styles is not always easy, especially when projects become larger and larger teams may work on them. Here, variables are introduced to solve these challenges.

Understanding how a variable can serve as a unified source from reality is extremely important. Instead of using colors or dimensions repetitively in CSS styles, we can define them as variables and use them collectively everywhere.

Additionally, one of the reasons for the popularity of CSS variables is their ability to enhance readability, and consequently, the maintainability of code. By defining variables, we can consistently apply them in other locations, reducing potential errors and issues.

Moreover, when a variable needs to change for any reason in its styles, we can apply changes only in the instances where the variables have been defined, and the rest of the styles will automatically be updated. In this design type, the flexibility of revision is very powerful.

:root {
    --main-bg-color: #efefef;
    --main-text-color: #333;
}

body {
    background-color: var(--main-bg-color);
    color: var(--main-text-color);
}

h1 {
    color: var(--main-text-color);
}

Code Explanation

:root
This part of the code defines the scope of variables at a high level.

--main-bg-color and --main-text-color
Two CSS variables that define the primary background color and the primary text color.

var(--main-bg-color) and var(--main-text-color)
Using the defined variables to apply them to various page elements.

body and h1
These are HTML elements that utilize the defined styles.