How to use delete keyword In Javascript
The JavaScript delete keyword is used to delete properties of an object in JavaScript.
Syntax:
delete object.property or
delete object[property]
Note:
- Delete keyword deletes both the property’s and the property’s value. After deletion, the property can not be used.
- The delete operator is designed to use on object properties. It can not be used on variables or functions.
- Delete operators should not be used on predefined JavaScript object properties. It can cause problems.
Example 1: This example deletes the address property of an object.
Javascript
let p = { name: "person1", age:50, address:"address1"};delete p.address;console.log("The address of " + p.name +" is " + p.address); |
Output
The address of person1 is undefined
Example 2: This example deletes the age property of an object.
Javascript
let p = { name: "person1", age: 50, address: "address1"};delete p.age;console.log(p.name + " is " + p.age + " years old."); |
Output
person1 is undefined years old.
How to remove a property from JavaScript object ?
In this article, we will remove a property from a Javascript Object.
Below are the following approaches to removing a property from a JavaScript object:
- Using JavaScript delete keyword
- Using destructuring assignment