delete operator

The delete operator removes a property from an object. After removal, this property will have an undefined value.

Syntax

delete object.property;

Let's create an object and remove one of its properties from it:

let obj = {
	name: 'john',
	age:  23,
};

delete user.name;
console.log(user.name);

The code execution result:

undefined

Let's create an array and remove an element from it:

let arr = ['a', 'b', 'c', 'd'];

delete arr[2];
console.log(arr);

The code execution result:

['a', 'b', empty, 'd']