It would be impractical to put your entire app in a single component. Instead, we can import components from other files and include them in our markup.
Add a <script> tag to the top of App.svelte that imports Nested.svelte...
App
<script>
import Nested from './Nested.svelte';
</script>...and include a <Nested /> component:
App
<p>This is a paragraph.</p>
<Nested />Notice that even though Nested.svelte has a <p> element, the styles from App.svelte don’t leak in.
Component names are capitalised, to distinguish them from HTML elements.
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<p>This is a paragraph.</p>
<style>
p {color: goldenrod;
font-family: 'Comic Sans MS', cursive;
font-size: 2em;
}
</style>