how to remove properties from object in javascript code example

Example 1: javascript remove property from object

var person = {"first_name": "Billy","last_name": "Johnson"};
delete person.last_name; //delete last_name property

Example 2: how to remove a property from an object in javascript

var person = {
        name: "Harry",
        age: 16,
        gender: "Male"
    };
    
    // Deleting a property completely
    delete person.age;
    alert(person.age); // Outputs: undefined
    console.log(person); // Prints: {name: "Harry", gender: "Male"}

Example 3: Delete Properties from a JavaScript Object

var ourDog = {
  "name": "Camper",
  "legs": 4,
  "tails": 1,
  "friends": ["everything!"],
  "bark": "bow-wow"
};

delete ourDog.bark;

Example 4: how to remove property of object in javascript without delete

const names = {
  father: "Johnny",
  brother: "Billy",
  sister: "Sandy"
}

const newNames = Object.keys(names).reduce((object, key) => {
  if (key !== "father") {
    object[key] = names[key]
  }
  return object
}, {})

// { brother: "Billy", sister: "Sandy" }