Component

js

Component.svelte

<script>
  let s = 'text';
</script>

<div>
  {s}
</div>

<style>
div {
  color: blue;
}
</style>

ts

Component.svelte

<script lang="ts">
  let s: string = 'text';
</script>

<div>
  {s}
</div>

<style>
div {
  color: blue;
}
</style>