What Is JavaScript?

JavaScript is a programming language used to make applications interactive.

Without JavaScript, apps would only display static content. With JavaScript, you can respond to user actions, update data, and control how the app behaves.

For example, JavaScript allows you to:

• Handle button clicks;
• Update content on the screen;
• Work with data.

In mobile development with React Native, JavaScript is the main language you will use to build your app logic.

At this stage, the key idea is simple: JavaScript controls how your app works and responds to users.