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Project Structure

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Your new Astro project generated from the create astro CLI wizard already includes some files and folders. Others, you will create yourself and add to Astro’s existing file structure.

Here’s how an Astro project is organized, and some files you will find in your new project.

Astro leverages an opinionated folder layout for your project. Every Astro project root should include the following directories and files:

  • src/* - Your project source code (components, pages, styles, etc.)
  • public/* - Your non-code, unprocessed assets (fonts, icons, etc.)
  • package.json - A project manifest.
  • astro.config.mjs - An Astro configuration file. (recommended)
  • tsconfig.json - A TypeScript configuration file. (recommended)

A common Astro project directory might look like this:

  • Folderpublic/
    • robots.txt
    • favicon.svg
    • social-image.png
  • Foldersrc/
    • Foldercomponents/
      • Header.astro
      • Button.jsx
    • Folderlayouts/
      • PostLayout.astro
    • Folderpages/
      • Folderposts/
        • post1.md
        • post2.md
        • post3.md
      • index.astro
    • Folderstyles/
      • global.css
  • astro.config.mjs
  • package.json
  • tsconfig.json

The src/ folder is where most of your project source code lives. This includes:

Astro processes, optimizes, and bundles your src/ files to create the final website that is shipped to the browser. Unlike the static public/ directory, your src/ files are built and handled for you by Astro.

Some files (like Astro components) are not even sent to the browser as written but are instead rendered to static HTML. Other files (like CSS) are sent to the browser but may be optimized or bundled with other CSS files for performance.

Components are reusable units of code for your HTML pages. These could be Astro components, or UI framework components like React or Vue. It is common to group and organize all of your project components together in this folder.

This is a common convention in Astro projects, but it is not required. Feel free to organize your components however you like!

The src/content/ directory is reserved to store content collections and an optional collections configuration file. No other files are allowed inside this folder.

Layouts are Astro components that define the UI structure shared by one or more pages.

Just like src/components, this directory is a common convention but not required.

Pages are a special kind of component used to create new pages on your site. A page can be an Astro component, or a Markdown file that represents some page of content for your site.

It is a common convention to store your CSS or Sass files in a src/styles directory, but this is not required. As long as your styles live somewhere in the src/ directory and are imported correctly, Astro will handle and optimize them.

The public/ directory is for files and assets in your project that do not need to be processed during Astro’s build process. The files in this folder will be copied into the build folder untouched, and then your site will be built.

This behavior makes public/ ideal for common assets like images and fonts, or special files such as robots.txt and manifest.webmanifest.

You can place CSS and JavaScript in your public/ directory, but be aware that those files will not be bundled or optimized in your final build.

This is a file used by JavaScript package managers to manage your dependencies. It also defines the scripts that are commonly used to run Astro (ex: npm start, npm run build).

There are two kinds of dependencies you can specify in a package.json: dependencies and devDependencies. In most cases, these work the same: Astro needs all dependencies at build time, and your package manager will install both. We recommend putting all of your dependencies in dependencies to start, and only use devDependencies if you find a specific need to do so.

For help creating a new package.json file for your project, check out the manual setup instructions.

This file is generated in every starter template and includes configuration options for your Astro project. Here you can specify integrations to use, build options, server options, and more.

Astro supports several file formats for its JavaScript configuration file: astro.config.js, astro.config.mjs, astro.config.cjs and astro.config.ts. We recommend using .mjs in most cases or .ts if you want to write TypeScript in your config file.

TypeScript config file loading is handled using tsm and will respect your project’s tsconfig options.

See the Configuring Astro Guide for details on setting configurations.

This file is generated in every starter template and includes TypeScript configuration options for your Astro project. Some features (like npm package imports) aren’t fully supported in the editor without a tsconfig.json file.

See the TypeScript Guide for details on setting configurations.

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