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 Properties from a JavaScript Object
var ourDog = {
"name": "Camper",
"legs": 4,
"tails": 1,
"friends": ["everything!"],
"bark": "bow-wow"
};
delete ourDog.bark;js Property Assignment delete
delete objectName['Property Name'];
delete objectName.propName;js delete
// JavaScript "delete"
const Employee = {
firstname: 'John',
lastname: 'Doe'
};
console.log(Employee.firstname);
// expected output: "John"
delete Employee.firstname;
console.log(Employee.firstname);
// expected output: undefined
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/deleteCopyright © 2021 Codeinu
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