JavaScript object operators
Delete operator
The delete
operator deletes a binding (duh)
let anObject = { left: 1, right: 2 }
console.log(anObject.left)
delete anObject.left
console.log(anObject.left)
console.log("left" in anObject)
console.log("right" in anObject)
In operator
The in
operator tells you whether and object has a property with that
name
let Object = {
thisPropertyExists: true,
}
console.log("thisPropertyExists" in Object)
console.log("thisPropertyDoesNotExist" in Object)