Скачать или смотреть Solving the document is not defined Error in React TSX Applications Using Vite and SSR

Discover how to resolve the `document is not defined` error when using React with TypeScript and Vite, especially in server-side rendering scenarios.
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This video is based on the question https://stackoverflow.com/q/77194878/ asked by the user 'Bogdan Deaconu' ( https://stackoverflow.com/u/18520517/ ) and on the answer https://stackoverflow.com/a/77195301/ provided by the user 'David Fox' ( https://stackoverflow.com/u/22631288/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving the document is not defined Error in React TSX Applications Using Vite and SSR

In the world of web development, encountering errors is part of the journey, especially when working with frameworks and libraries that come with their complexities. One common issue developers face is the ReferenceError: document is not defined error. This error typically occurs in server-side rendering (SSR) scenarios, especially for applications built with React, TypeScript, and Vite.

Understanding the Problem

When you're developing a React application that utilizes server-side rendering, Node.js is responsible for rendering your application on the server. However, Node.js does not have access to the document or window objects, which are only available in the browser. This leads to the error message like the one you may have encountered.

Imagine trying to reference something that doesn't exist in your current environment; that’s what happens with document when your app is running on the server.

The Context

In this specific scenario, the user was trying to build a multi-page application using React Router DOM, but upon starting the application, they faced the unfortunate document is not defined error.

Solution Breakdown

Resolving this issue involves ensuring that any client-side specific code only runs in the browser environment. Here’s a step-by-step guide to effectively handle this problem:

Step 1: Conditional Router Creation

You should conditionally create the browser router. This can be done by checking if the code is executing in a browser context:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Modify the App Component

In your App component, ensure it returns the router only if it exists (i.e., if we’re in a browser environment):

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Hydration on the Client Side

Make sure your client-side code properly hydrates the application. The structure of your entry-client file looks correct, but it’s essential to double-check that it’s properly configured. To emphasize, your entry-client file should resemble:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following these steps, you can effectively resolve the document is not defined error when working on React applications that involve server-side rendering. Remember to conditionally execute browser-specific code only on the client side, and ensure proper hydration to maintain a seamless experience for your users.

With this knowledge, you can confidently build and troubleshoot applications without the frustration of common SSR errors. Happy coding!