hydrogen/packages/hydrogen/src/framework/docs/third-party-dependencies.md
2021-11-09 17:03:36 -08:00

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<!-- This file is generated from the source code and any changes you make here will be overwritten. For more information, refer to https://github.com/Shopify/shopify-dev/blob/master/content/internal/operations/hydrogen-reference-docs.md. -->
Third-party dependencies will generally work out-of-the-box with Hydrogen. This guide describes how to install third-party dependencies, where to insert them, and offers tips for troubleshooting dependencies.
## Install dependencies
To install third party dependencies, run one of the following commands:
{% codeblock file, filename: 'Terminal' %}
```bash
// Install dependencies with npm
npm install <dependency>
// Install dependencies with yarn
yarn add <dependency>
```
{% endcodeblock %}
## Where to insert dependencies
Consider the following:
- If the dependency interacts with `useState` or browser APIs, then place it inside a `*.client.jsx` component. Follow the [rules of server and client components](/api/hydrogen/framework/react-server-components#rules-for-server-and-client-components).
- If the dependency is purely client-based, and you don't need to interact with it in individual components, then you can insert it in `src/entry-client.jsx`.
- If the dependency includes a style import from a CSS file, then you can import that in `src/entry-client.jsx`.
## Troubleshooting dependencies
When bundling third-party dependencies, you might see errors in development or production related to the incorrect bundle type being used from the package.
This happens because [Vite](https://vitejs.dev/) uses a heuristic to determine whether to load a module-based import (ESM) or a CommonJS-based import (CJS). Sometimes, the heuristic chooses the wrong version, or the third-party package formats their project in an unusual way.
To fix this, you can try adding the dependency to the `optimizeDeps.include` property of your `vite.config.js` file:
{% codeblock file, filename: 'vite.config.js' %}
```js
import {defineConfig} from 'vite';
import hydrogen from '@shopify/hydrogen/plugin';
import shopifyConfig from './shopify.config';
// https://vitejs.dev/config/
export default defineConfig({
plugins: [hydrogen(shopifyConfig)],
optimizeDeps: {
include: ['YOUR_DEPENDENCY'],
},
});
```
{% endcodeblock %}
Similarly, if you find that a dependency is being optimized when it shouldn't, you can try adding the dependency to `optimizeDeps.exclude` to see if it fixes the issue.
## More help
- Learn more about dependency pre-bundling and optimization in [Vite](https://vitejs.dev/guide/dep-pre-bundling.html#dependency-pre-bundling).
- [Check this GitHub discussion](https://github.com/Shopify/hydrogen/discussions/603) to see if another developer has the same issue or report a new issue to Hydrogen maintainers.