Use the delete operator to delete object property in JavaScript. To remove a property from an object (mutating the object), you can do it like this:
delete myObject.property;
// or
delete myObject['property'];
// or
var prop = "property";
delete myObject[prop];Note: The delete operator deletes both the value of the property and the property itself.
JavaScript delete object property
Simple example code deleting object property using dot and bracket notations.
<!DOCTYPE html>
<html>
<body>
<script>
var person = {
fName:"John",
lName:"king",
age:50,
active:true
};
console.log(person)
delete person.age;
delete person['lName'];
console.log(person)
</script>
</body>
</html>Output:
If you’d like a new object with all the keys of the original except some, you could use destructuring.
let myObject = {
"ircEvent": "PRIVMSG",
"method": "newURI",
"regex": "^http://.*"
};
const {regex, ...newObj} = myObject;
console.log(newObj); // has no 'regex' key
console.log(myObject); // remains unchangedObject destructuring with rest syntax
const employee = {
name: 'John Smith',
position: 'Sales Manager'
};
const { position, ...employeeRest } = employee;
console.log(employeeRest); // { name: 'John Smith' }
console.log(employee);
// { name: 'John Smith',position: 'Sales Manager' }Do comment if you have any doubts or suggestions on this Js object topic,
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version