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72 lines
3 KiB
Markdown
72 lines
3 KiB
Markdown
---
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layout: ~/layouts/Main.astro
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title: Astro Pages
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---
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**Pages** are a special type of [Astro Component](./astro-components) that handle routing, data loading, and templating for each page of your website. You can think of them like any other Astro component, just with extra responsibilities.
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Astro also supports Markdown for content-heavy pages, like blog posts and documentation. See [Markdown Content](./markdown-content.md) for more information on writing pages with Markdown.
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## File-based Routing
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Astro uses Pages to do something called **file-based routing.** Every file in your `src/pages` directory becomes a page on your site, using the file name to decide the final route.
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Astro Components (`.astro`) and Markdown Files (`.md`) are the only supported formats for pages. Other page types (like a `.jsx` React component) are not supported, but you can use anything as a UI component inside of an `.astro` page to achieve a similar result.
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### Examples
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```
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src/pages/index.astro -> mysite.com/
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src/pages/about.astro -> mysite.com/about
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src/pages/about/index.astro -> mysite.com/about
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src/pages/about/me.astro -> mysite.com/about/me
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src/pages/posts/1.md -> mysite.com/posts/1
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```
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## Data Loading
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Astro pages can fetch data to help generate your pages. Astro provides two different tools to pages to help you do this: **fetch()** and **top-level await.**
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```astro
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---
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// Example: Astro component scripts run at build time
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const response = await fetch('http://example.com/movies.json');
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const data = await response.json();
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console.log(data);
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---
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<!-- Output the result to the page -->
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<div>{JSON.stringify(data)}</div>
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```
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### `fetch()`
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Astro pages have access to the global `fetch()` function in their setup script. `fetch()` is a native JavaScript API ([MDN](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch)) that lets you make HTTP requests for things like APIs and resources.
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Even though Astro component scripts run inside of Node.js (and not in the browser) Astro provides this native API so that you can fetch data at page build time.
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### Top-level await
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`await` is another native JavaScript feature that lets you await the response of some asynchronous promise ([MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await)). Astro supports `await` in the top-level of your component script.
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## Page Templating
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All Astro components are responsible for returning HTML. Astro Pages return HTML as well, but have the unique responsibility of returning a full `<html>...</html>` page response, including `<head>` ([MDN](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/head)) and `<body>` ([MDN](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/body)).
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`<!doctype html>` is optional, and will be added automatically.
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```astro
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---
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// Example: HTML page skeleton
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---
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<!doctype html>
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<html>
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<head>
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<title>Document title</title>
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</head>
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<body>
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<h1>Hello, world!</h1>
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</body>
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</html>
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```
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