Client-side scripts are interpreted by the browser and executed on the client system. Client-side scripting can be used to make web pages change after they arrive at the browser.

For Higher Computing Science, learn about JavaScript, the main client-side scripting language used to create, delete and manipulate HTML elements.

The ECMAScript 2025 specification, now final, standardizes new JavaScript capabilities including JSON modules, regex capabilities, Set methods, and sync iterator helper methods.