freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/add-new-properties-to-a-javascript-object.english.md

id, title, challengeType, videoUrl, forumTopicId

id	title	challengeType	videoUrl	forumTopicId
56bbb991ad1ed5201cd392d2	Add New Properties to a JavaScript Object	1	https://scrimba.com/c/cQe38UD	301169

Description

You can add new properties to existing JavaScript objects the same way you would modify them. Here's how we would add a "bark" property to ourDog: ourDog.bark = "bow-wow"; or ourDog["bark"] = "bow-wow"; Now when we evaluate ourDog.bark, we'll get his bark, "bow-wow".

Example:

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

ourDog.bark = "bow-wow";

Instructions

Add a "bark" property to myDog and set it to a dog sound, such as "woof". You may use either dot or bracket notation.

Tests

tests:
  - text: You should add the property <code>"bark"</code> to <code>myDog</code>.
    testString: assert(myDog.bark !== undefined);
  - text: You should not add <code>"bark"</code> to the setup section.
    testString: assert(!/bark[^\n]:/.test(code));

Challenge Seed

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

// Only change code below this line

After Test

(function(z){return z;})(myDog);

Solution

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