⚖️for-in vs. for-of vs. in

`for key in iterable`, `for value of iterable`, `prop in obj`.

JS⟩ syntax ⟩ for loops ⟩ for-in vs. for-of vs. in

| ✅：string / symbol | ❌：not available | 🔤：String | 🔺：Symbol

method/operator	own enum	own nonenum	inherited enum	inherited nonenum
.assign()	✅	❌	❌	❌
Object spread	✅	❌	❌	❌
.keys(), .values(), .entries()	🔤	❌	❌	❌
.getOwnPropertyNames()	🔤	🔤	❌	❌
.getOwnPropertySymbols()	🔺	🔺	❌	❌
.getOwnPropertyDescriptors()	✅	✅	❌	❌
Reflect.ownKeys()	✅	✅	❌	❌
for-in (loop over keys)	🔤	❌	🔤	❌
for-of (loop over values)	🔤	❌	🔤	❌

method/operator

own enum

own nonenum

inherited enum

inherited nonenum

✅

❌

✅

❌