## Bug
- [ ] Related issues linked using `fixes #33314` #33314
- [ ] Moved the `is-plain-object` file to the shared directory since it's emitted to the client and thus needs to be transpiled.
This is just my 2nd PR so if I'm missing something please let me know.
* JSON.stringify generic errors
* Add util for normalizing errors
* lint-fix
* Add better error for null case as well
Co-authored-by: Michael Ozeryansky <mozeryansky@users.noreply.github.com>
I recently received the "Props must be returned as a plain object" error when I accidentally dropped an array directly inside `props`. This is a trivial error to fix once you know what you did, but I spent good 30 minutes looking in all the wrong places. I hope that this slight clarification in the error message would save someone from wasting their time if they make a similar mistake like myself.
This replaces the seen set with a newly instantiated map of refs per
value in the array. This corrects the behavior that the refs map passed
into isSerializable contains only values along the path to the current
value: previously, because the refs map was shared among all values in
the array, this would trigger on instances such as:
```js
const x = [];
isSerializableProps('/', 'test', { arr: [x, [x]] });
```
... where the reference is shared but there is no cycle formed, as the
presence of elements is disjoint.
Fixes#18228.
Was going through _document and noticed some variable shadowing going on. Added a rule for it to our eslint configuration and went through all warnings with @Timer.
* Verify GS(S)P Serializability
* Add support for cyclic refs
* Add unit tests
* Test for error in development mode
* Fix prerender preview tests
* Fix gssp preview tests
* fix 2x test cases
* Add desired test
* fix some more tests
* Fix route manifest expect
* Fix test expects
* Test that `getServerSideProps` does not error in production
* Test that getStaticProps is not checked in production
* Test serialization check during build
* Fix export detection for serverless
* Update test/unit/is-serializable-props.test.js
Co-Authored-By: JJ Kasper <jj@jjsweb.site>
Co-authored-by: JJ Kasper <jj@jjsweb.site>