A client side scripting language useful for making interactive web sites. Questions about using JavaScript outside a WordPress context are off-topic but might be asked on Stack Overflow.

JavaScript is an interpreted language that runs client-side, in the web browser. It is useful for creating interactive site components and for loading content selectively, without loading the entire page.

WordPress has a number of functions for managing JavaScript, including registering and enqueuing JavaScript files and localizing scripts. WordPress also has an API for use when constructing AJAX applications.

Note that questions about using JavaScript outside a WordPress context are off-topic but might be asked on Stack Overflow.

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Code Language (used for syntax highlighting): lang-js