Microsoft/TypeScript
Destructuring into an empty object vs an object with existing properties yields different results
Ouverte
#60 386 ouverte le 31 oct. 2024
BugDomain: check: Excess Property CheckingHelp Wanted
Métriques du dépôt
- Stars
- (108 860 étoiles)
- Métriques de merge PR
- (Métriques PR en attente)
Description
🔎 Search Terms
"destructuring", "record"
🕗 Version & Regression Information
- This is the behavior in every version I tried, and I reviewed the FAQ.
⏯ Playground Link
💻 Code
This raises a type error:
const recordWithStrings: Record<string, string> = {};
export const recordWithNumbers: Record<string, number> = {
...recordWithStrings,
};
and this doesn't:
const recordWithStrings: Record<string, string> = {};
export const recordWithNumbers: Record<string, number> = {
extraProperty: 0,
...recordWithStrings,
};
Is there a sound reason for that?
🙁 Actual behavior
The 2nd example doesn't raise a type error.
🙂 Expected behavior
The 2nd example should raise a type error.
Additional information about the issue
No response