What are the differences between CSS variables and preprocessor variables?

What are the differences between CSS variables and preprocessor variables?

CSS variables, also known as custom properties, are defined in CSS and can be accessed directly in stylesheets. Preprocessor variables, like those in SASS or LESS, are defined in the preprocessor and compiled into CSS.

Can you give me an example of how to use both?

Sure! For CSS variables, you might define a color like this: --main-color: blue; and use it with color: var(--main-color);. In SASS, you would define a variable like $main-color: blue; and use it with color: $main-color;.

Which one is better for a large project?

It depends on your needs. CSS variables are great for dynamic theming and runtime changes, while preprocessor variables are useful for complex calculations and nesting.

Are there any browser compatibility issues with CSS variables?

CSS variables are supported in most modern browsers, but older versions of Internet Explorer do not support them. It's good to check compatibility if your project needs to support older browsers.