JavaScript With CSS Variables for Beginners in Hindi

What is CSS Variable?
CSS Variables are custom attributes or properties which can be used upon DOM elements to style them. Custom properties (sometimes referred to as CSS variables or cascading variables) are entities defined by CSS authors that represent specific values to be reused throughout a document. Complex websites have very large amounts of CSS, and this often results in a lot of repeated CSS values. Custom properties allow a value to be defined in one place, then referenced in multiple other places so that it's easier to work with.
The var() function is used to insert the value of a CSS variable.

CSS variables have access to the DOM, which means that you can create variables with local or global scope, change the variables with JavaScript, and change the variables based on media queries.

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