A component that just renders some static markup isn't very interesting. Let's add some data.

First, add a script tag to your component and declare a name variable:

<script>
  let name = 'world';
</script>

<h1>Hello world!</h1>

Then, we can refer to name in the markup:

<h1>Hello {name}!</h1>

Inside the curly braces, we can put any JavaScript we want. Try changing name to name.toUpperCase() for a shoutier greeting.