JS: Access Property

By Xah Lee. Date: 2013-11-19. Last updated: 2024-04-12.

Get

syntax	use proto chain	work with Symbol Key
`obj.k`	✅	✅
`obj?.k` Optional Chaining Operator	✅	✅
`obj[k]` Dot Notation vs Bracket Notation	✅	✅
Reflect.get	✅	✅

Set

syntax	use proto chain	work with Symbol Key
`obj.k = v`	no	✅
`obj[k] = v`	no	✅
Reflect.set	no	✅

Delete

syntax	use proto chain	work with Symbol Key
“delete” Operator	no	✅
Reflect.deleteProperty	no	✅

Check Existence

syntax	use proto chain	work with Symbol Key
Object.prototype.hasOwnProperty	no	✅
“in” Operator	✅	✅
Reflect.has	✅	✅

Enumerate Properties

syntax	use proto chain	Enumerable only	include Symbol Key	include string key
for-in Loop	✅	✅	no	✅
for-of Loop	N/A	N/A	N/A	N/A

List Properties

List Properties

JavaScript, Property