It’s a client-side language, which means it is run by a user’s browser on their device. It’s also faster than server-side languages and enables web developers to add features that wouldn’t be possible if the code was on the server.
This is especially useful when working with complex pages. It allows you to load parts of the page independently, which can improve speed and memory usage.
How it works
Variables are declared using the var keyword, which can be global or block-scoped (accessible only in a certain block of the code). They may contain either fixed values (constants known as literals) or alterable values.
Once declared, a variable can be assigned a value using the var keyword or through a function. In both cases, the value is stored in the variable’s FEC.
It’s also great for detecting user actions, such as touch screen presses, cursor movements, mouse clicks and scrolls. This can help you detect whether a user is active or inactive and store data, such as previous site activity and webpage preferences, on the user’s device.