Answers for "delete in javascript"

javascript delete key from object

let person = {
  firstname: 'John',
  lastname: 'Doe'
}

console.log(person.firstname);
// expected output: "John"

delete person.firstname;

console.log(person.firstname);
// expected output: undefined

javascript delete element

Removing an element is much easier, as it only requires the element's ID.
1. function removeElement(elementId) {
2. // Removes an element from the document.
3. var element = document. getElementById(elementId);
4. element. parentNode. removeChild(element);
5. }

Example:
<h1>The remove() Method</h1>

<p>The remove() method removes the element from the DOM.</p>

<p id="demo">Click the button, and this paragraph will be removed from the DOM.</p>

<button onclick="myFunction()">Remove paragraph</button>

<script>
function myFunction() {
  var myobj = document.getElementById("demo");
  myobj.remove();
}
</script>

js delete element

// delete an element from the dom
var elem = document.querySelector('#some-element');
elem.parentNode.removeChild(elem);


// keep element in dom
var elem = document.querySelector('#some-element');
elem.style.display = 'none';

delete element javascript

element.parentNode.removeChild(element);

what is the function of delete operator in javascript

var student= {age:20, batch:"ABC"};
delete student.age;

javascript remove object key

var obj = {a: 5, b: 3};
delete obj["a"];
console.log(obj); // {b: 3}