87b0e5bb7a
* Remove unnecessary comments https://github.com/freeCodeCamp/freeCodeCamp/pull/41612 * Update the hints section
91 lines
1.4 KiB
Markdown
91 lines
1.4 KiB
Markdown
---
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id: 56bbb991ad1ed5201cd392d2
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title: Add New Properties to a JavaScript Object
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cQe38UD'
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forumTopicId: 301169
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dashedName: add-new-properties-to-a-javascript-object
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---
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# --description--
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You can add new properties to existing JavaScript objects the same way you would modify them.
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Here's how we would add a `bark` property to `ourDog`:
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```js
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ourDog.bark = "bow-wow";
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```
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or
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```js
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ourDog["bark"] = "bow-wow";
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```
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Now when we evaluate `ourDog.bark`, we'll get his bark, `bow-wow`.
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Example:
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```js
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var ourDog = {
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"name": "Camper",
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"legs": 4,
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"tails": 1,
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"friends": ["everything!"]
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};
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ourDog.bark = "bow-wow";
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```
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# --instructions--
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Add a `bark` property to `myDog` and set it to a dog sound, such as "woof". You may use either dot or bracket notation.
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# --hints--
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You should add the property `bark` to `myDog`.
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```js
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assert(myDog.bark !== undefined);
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```
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You should not add `bark` to the initialization of `myDog`.
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```js
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assert(!/bark[^\n]:/.test(code));
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```
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# --seed--
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## --after-user-code--
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```js
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(function(z){return z;})(myDog);
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```
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## --seed-contents--
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```js
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var myDog = {
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"name": "Happy Coder",
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"legs": 4,
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"tails": 1,
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"friends": ["freeCodeCamp Campers"]
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};
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```
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# --solutions--
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```js
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var myDog = {
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"name": "Happy Coder",
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"legs": 4,
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"tails": 1,
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"friends": ["freeCodeCamp Campers"]
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};
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myDog.bark = "Woof Woof";
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```
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