javascript - TypeError [ERR_INVALID_ARG_TYPE]: "to" argument must be of type string in Next.js project - Stack

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I'm developing a Next.js application and encountered a TypeError related to the "to" argument being undefined. This error occurs when I run my development server with npm run dev. I've checked my environment setup and the related project dependencies but haven't been able to pinpoint the cause of this error.

Error Message: TypeError [ERR_INVALID_ARG_TYPE]: The "to" argument must be of type string. Received undefined at validateString (node:internal/validators:162:11) at Object.relative (node:path:1195:5) at Watchpack. (/Users/gracemitchell/.primebid.estimate/node_modules/next/dist/server/lib/router-utils/setup-dev-bundler.js:1420:55) ... Environment:

• Node.js version: (specify your version, e.g., 20.11.0)
• Next.js version: 14.1.0
• Operating System: (e.g., macOS, specify if relevant)

I've attempted the following troubleshooting steps without success:

1. Checked .env.local and other environment configuration files for any obvious issues.
2. Ensured all dependencies are up to date with npm update.
3. Searched for similar issues in the Next.js GitHub issues and Stack Overflow.

Questions:

1. What could be causing this TypeError related to the "to" argument being undefined?
2. Are there specific configurations or dependencies in Next.js that I should check?
3. Has anyone experienced a similar issue and found a workaround or solution?

Any insights or suggestions would be greatly appreciated. Thank you!

1. What could be causing this TypeError related to the "to" argument being undefined?
2. Are there specific configurations or dependencies in Next.js that I should check?
3. Has anyone experienced a similar issue and found a workaround or solution?

Any insights or suggestions would be greatly appreciated. Thank you!

I'm developing a Next.js application and encountered a TypeError related to the "to" argument being undefined. This error occurs when I run my development server with npm run dev. I've checked my environment setup and the related project dependencies but haven't been able to pinpoint the cause of this error.

Error Message: TypeError [ERR_INVALID_ARG_TYPE]: The "to" argument must be of type string. Received undefined at validateString (node:internal/validators:162:11) at Object.relative (node:path:1195:5) at Watchpack. (/Users/gracemitchell/.primebid.estimate/node_modules/next/dist/server/lib/router-utils/setup-dev-bundler.js:1420:55) ... Environment:

• Node.js version: (specify your version, e.g., 20.11.0)
• Next.js version: 14.1.0
• Operating System: (e.g., macOS, specify if relevant)

I've attempted the following troubleshooting steps without success:

1. Checked .env.local and other environment configuration files for any obvious issues.
2. Ensured all dependencies are up to date with npm update.
3. Searched for similar issues in the Next.js GitHub issues and Stack Overflow.

Questions:

1. What could be causing this TypeError related to the "to" argument being undefined?
2. Are there specific configurations or dependencies in Next.js that I should check?
3. Has anyone experienced a similar issue and found a workaround or solution?

Any insights or suggestions would be greatly appreciated. Thank you!

1. What could be causing this TypeError related to the "to" argument being undefined?
2. Are there specific configurations or dependencies in Next.js that I should check?
3. Has anyone experienced a similar issue and found a workaround or solution?

Any insights or suggestions would be greatly appreciated. Thank you!

• javascript
• node.js
• next.js

Share Improve this question Follow asked Feb 15, 2024 at 20:43 GraceGrace 3111 silver badge22 bronze badges 2

• check if this was introduced after recent changes and try to isolate the issue by removing those recent changes, if the error goes away try pasting the causing code here if you need further help – dukenicols Commented Feb 15, 2024 at 21:40
• Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. – Community Bot Commented Feb 16, 2024 at 7:10

Add a ment  | 

4 Answers 4

Sorted by: Reset to default 4

I had the exact same problem and in my case it was very simple. I had created a new version of a page using Typescript, but had not deleted the previous Javascript version. So I had in the pages folder

/pages/onboarding.js
/pages/onboarding.tsx

which were pletely different files. The project was probably assuming the .js file was a piled version of the .tsx file.

I just deleted the old .js file and everything worked again. ✨

The error message does not help at all, though.

Can be for many reasons as the error message is generic and not helpful. For me it was a problem in the generateMetadata function in my page.js sending a wrong image path

In my case I had multiple pages with the same name so I had to delete the existing one and the problem got resolved instantly.

It happens when you have multiple files with the same name, under a folder, or even when the folder and a file are named the same,

eg. /pages/reviews and /page/reviews.js or /pages/reviews.tsx and /pages/reviews.jsx

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