44d1a1cb15
This PR is part of a larger effort to migrate error messages to MDX and use App Router: https://github.com/vercel/front/pull/23459
23 lines
577 B
Text
23 lines
577 B
Text
---
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title: 'Threw `undefined` / `null`'
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---
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## Why This Error Occurred
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Somewhere in your code you `throw` an `undefined` or `null` value. Since this isn't a valid error there isn't a stack trace. We show this error instead to let you know what to look for.
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```js filename="pages/index.js"
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function getData() {
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let error
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throw error
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}
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function Page() {
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const error = data?.error || null
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throw error
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}
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```
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## Possible Ways to Fix It
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Look in your pages and find where an error could be throwing `undefined` or `null` values and ensure `new Error()` is used instead.
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