JavaScript: Create/Delete Property

Create Property When Object is Created

Properties can be created at the same time when you create a object. There are 2 ways:

• Object Literal Expression
• Object.create

Add Property

New properties can be added to a existing object. If the property already exist, it's modified. Here's the ways:

• obj.k = v [see Property Dot Notation / Bracket Notation]
• Reflect.set
• Reflect.defineProperty
• Object.defineProperty
• Object.defineProperties

Delete Property

• “delete” Operator
• Reflect.deleteProperty