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svelte/site/content/tutorial/01-introduction/05-nested-components/text.md

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---
title: Nested components
---
It would be impractical to put your entire app in a single component. Instead, we can import components from other files and then use them as though we were including elements.
We now present you 2 files in the editor on the right (upper bar) to click on, `App.svelte` and `Nested.svelte`.
Each `.svelte` file holds a component that is a reusable self-contained block of code that encapsulates HTML, CSS, and JavaScript that belong together.
Let's add a `<script>` tag to `App.svelte` that imports the file (our component) `Nested.svelte` into our app...
```html
<script>
import Nested from './Nested.svelte';
</script>
```
...then use component `Nested` in the app markup:
```html
<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.
Also notice that the component name `Nested` is capitalised. This convention has been adopted to allow us to differentiate between user-defined components and regular HTML tags.