CSS Variables vs Sass Variables

CSS and Sass are both stylesheet languages used for styling web pages. They both have the ability to store values in variables and reuse them throughout the stylesheet. But there is a difference between the way CSS variables and Sass variables work, and in this article, we will explore the similarities and differences between the two.

CSS Variables

CSS Variables, also known as CSS Custom Properties, are a feature introduced in CSS3. They are defined using the “–” syntax, for example:

:root {   --primary-color: blue; }  h1 {   color: var(--primary-color); } 

CSS variables are scoped to the element where they are declared and can be overridden in descendants. They can be dynamically updated using JavaScript, which opens up new possibilities for dynamic styling on the web.

Sass Variables

Sass is a preprocessor for CSS, it adds additional features to CSS such as variables, nesting, and mixins. Sass variables are declared using the “$” symbol, for example:

$primary-color: blue;  h1 {   color: $primary-color; } 

Sass variables have the same functionality as CSS variables, but they have some additional features. Sass variables can be assigned to expressions, which allows you to perform calculations and generate complex styles dynamically.

$width: 500px; $height: $width / 2;  .container {   width: $width;   height: $height; } 

Another advantage of Sass variables is that they can be organized into maps, which allows you to group related variables and make your code more readable.

$colors: (   primary: blue,   secondary: green );  h1 {   color: map-get($colors, primary); } 

Differences between CSS and Sass Variables

  1. Scoping: CSS variables are scoped to the element where they are declared, while Sass variables are global and can be accessed from any part of the stylesheet.
  2. Dynamic updates: CSS variables can be updated dynamically with JavaScript, while Sass variables cannot.
  3. Expressions: Sass variables can be assigned to expressions, which allow you to perform calculations and generate complex styles dynamically, while CSS variables cannot.
  4. Maps: Sass variables can be organized into maps, making it easier to group related variables and make your code more readable, while CSS variables do not have this feature.

Conclusion

In conclusion, both CSS and Sass variables serve the same purpose, which is to store values and reuse them throughout the stylesheet. However, Sass variables offer additional features such as expressions and maps, which make them a better choice for complex stylesheets. On the other hand, CSS variables are scoped to the element where they are declared and can be updated dynamically with JavaScript, making them a better choice for dynamic styling on the web. Choose the right tool for the job, and you’ll have an easier time styling your website.