new Object().constructor === Object returns false

[fabian-hiller]

Bug Report

new Object().constructor === Object returns false in Next.js with edge runtime enabled.

A clear and concise description of the behavior.

new Object().constructor === Object should return true.

A clear and concise description of what you expected to happen (or code).

new Object().constructor === Object should return true

Workaround: new Object().constructor === Object.prototype.constructor

With other objects like Date it works: new Date().constructor === Date returns true

Steps to reproduce:

1. Install Next.js
2. Add export const runtime='edge' to page.tsx
3. Add console.log(new Object().constructor === Object) to page.tsx
4. Run next dev

[flostellbrink]

Just ran into this too. Easier reproduction:

npx edge-runtime --eval "({}).constructor == Object" -> false
node --eval "console.log(({}).constructor == Object)" -> true

[aldebout]

I think this is the root cause of this issue flightcontrolhq/superjson#302, would appreciate an answer from the maintainers :)

[zachweinberg]

+1