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83 lines
3 KiB
Markdown
83 lines
3 KiB
Markdown
---
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layout: ~/layouts/Main.astro
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title: Publish a Component to NPM
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---
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Built a great Astro component? **Publish it to [npm!](https://npmjs.com/)**
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Once published to npm, Astro components can be installed and used in your project like any other npm package. npm is a great way to share Astro components across projects within your team, your company, or the entire world.
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## Basic NPM Package Setup
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Here's an example package that we'd like to publish to npm. It includes two Astro components and a few other files.
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```
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/my-components-package/
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├── package.json
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├── index.js
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├── Capitalize.astro
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└── Bold.astro
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```
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### `package.json`
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Your package manifest. This includes information about your package such as name, description, any dependencies, and other important metadata. If you don't know what the `package.json` file is, we highly recommend you to have a quick read on [the npm documentation](https://docs.npmjs.com/creating-a-package-json-file).
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We recommend that you define an [exports entry](https://nodejs.org/api/packages.html) for your `index.js` package entrypoint like so:
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```json
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{
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"name": "@example/my-components",
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"version": "0.0.1",
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"exports": "./index.js"
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}
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```
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### `index.js`
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`index.js` is your package entrypoint, which is the file that gets loaded when someone imports your package by name. Having a JavaScript file as your package entrypoint will let you export multiple components and have better control over their exported component names.
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```js
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export { default as Capitalize } from './Capitalize.astro';
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export { default as Bold } from './Bold.astro';
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```
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### Publishing
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Once you have your package ready, you can publish it to npm by running the command `npm publish`. If that fails, make sure that you've logged in via `npm login` and that your package.json is correct.
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Once published, anyone will be able to install your components and then import them like so:
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```astro
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---
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import { Bold, Capitalize } from '@example/my-components';
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---
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<Capitalize phrase={`Hello world`} />
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```
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## Advanced
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We recommend a single `index.js` package entrypoint because this is what most users are familar with. However, in some rare scenarios you may want to have your users import each `.astro` component directly, in the same manner that you import `.astro` files in your own project.
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```astro
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---
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import Capitalize from '@example/my-components/Capitalize.astro';
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---
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<Capitalize phrase={`Hello world`} />
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```
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This is a less common scenario, and we only recommend it if you have good reason. Because Astro is completely rendered at build-time, there are no client-side performance concerns to our default recommendation to export your components from a single `index.js` file.
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To support importing by file within your package, add each file to your **package.json** `exports` map:
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```diff
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{
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"name": "@example/my-components",
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"version": "1.0.0",
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"exports": {
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- ".": "./index.js",
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+ "./Bold.astro": "./Bold.astro",
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+ "./Capitalize.astro": "./Capitalize.astro"
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}
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}
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```
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