What is JavaScript?

JavaScript is the programming language of the web. HTML structures the page, CSS styles it. JavaScript makes it interactive.

You can write JavaScript directly in your HTML using <script> tags:

<script>
  console.log("Hello World!");
  alert("I am JavaScript!");
</script>

Where does it run?

JavaScript runs in your browser, no installation needed!

Task

Click the button and see JavaScript in action. Then change the alert message!