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16 lines
693 B
Plaintext
16 lines
693 B
Plaintext
---
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title: 'Circular structure in `getInitialProps` result'
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---
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## Why This Error Occurred
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`getInitialProps` is serialized to JSON using `JSON.stringify` and sent to the client side for hydrating the page.
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However, the result returned from `getInitialProps` can't be serialized when it has a circular structure.
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## Possible Ways to Fix It
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Circular structures are not supported, so the way to fix this error is removing the circular structure from the object that is returned from `getInitialProps`.
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For example, the `req` instance exposed is a circular object and can not be serialized, instead the specific fields such as relevant headers on the instance should be passed specifically.
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