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: undefinedjavascript 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: undefinedjavascript 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}Copyright © 2021 Codeinu
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