add property on object js code example

Example 1: Add New Properties to a JavaScript Object

var myDog = {
  "name": "Happy Coder",
  "legs": 4,
  "tails": 1,
  "friends": ["freeCodeCamp Campers"]
};

myDog.bark = "woof";
// or
myDog["bark"] = "woof";

Example 2: add property with value in js

var myObject = {
    sProp: 'some string value',
    numProp: 2,
    bProp: false
};