How to create a new property in CSS using JavaScript?

The article on Fully Stacked discusses the introduction to CSS custom properties. The author explains what these properties are and how they can be used in web projects. These properties have a variable format starting with --, allowing for the creation of more dynamic and flexible styles. This approach enables web developers to define a consistent set of colors, font sizes, or margins that can easily be changed in one place. Not only does this simplify style management, but it also improves the readability and organization of the code. The author provides usage examples and explains how they can be combined with other technologies such as JavaScript, further enhancing their utility in interactive web pages.