Skip to content
Related Articles

Related Articles

Improve Article
Save Article
Like Article

How to remove a property from JavaScript object ?

  • Last Updated : 27 Mar, 2019

delete keyword is used to delete properties of an object in javaScript.
Syntax:

delete object.property or
delete object[property]

Note:

Hey geek! The constant emerging technologies in the world of web development always keeps the excitement for this subject through the roof. But before you tackle the big projects, we suggest you start by learning the basics. Kickstart your web development journey by learning JS concepts with our JavaScript Course. Now at it's lowest price ever!

  • Delete keyword deletes the both value of the property and property also.After deletion, the property can not be used.
  • Delete operator is designed to used on object properties. It can not be used on variables or functions.
  • Delete operator should not be used on predefined JavaScript object properties. It can cause problems.

Example 1: This example deletes the address property of an object.




<!DOCTYPE html>  
<html>  
    <head
        <title></title>
    </head
        
    <body style = "text-align:center;">  
        <h1 style = "color:green;" >  
            GeeksForGeeks  
        </h1>
        <p id="demo">the address of person1 is address1</p
  
        <button onClick="fun()">click
        </button>
  
        <script>
        function fun(){
          let p = {
            name: "person1",
            age:50,
            address:"address1"
          };
           delete p.address;
           document.getElementById("demo").innerHTML =
           "the address of "+ p.name +" is " + p.address;         
          }
        </script
    </body>  
</html>


Output:

  • Before clicking the button:
  • After clicking the button:
    • Example 2: This example deletes the age property of an object.




      <!DOCTYPE html>  
      <html>  
          <head
              <title></title>
          </head
              
          <body style = "text-align:center;">  
          
              <h1 style = "color:green;" >  
                  GeeksForGeeks  
              </h1>
              <p id="demo">person1 is 50 years old.</p
        
              <button onClick="fun()">click
              </button>
        
              <script>
              function fun(){
                let p = {
                  name: "person1",
                  age:50,
                  address:"address1"
                };
        
                delete p.age;
                document.getElementById("demo").innerHTML =
                p.name + " is " + p.age + " years old. ";
      }
              </script
          </body>  
      </html>

      
      

      Output:

      • Before clicking the button:
      • After clicking the button:



        • My Personal Notes arrow_drop_up
Recommended Articles
Page :