what is the best way of deleting object properties code example
Example 1: 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
Example 2: javascript remove property from object
var person = {"first_name": "Billy","last_name": "Johnson"};
delete person.last_name; //delete last_name property