freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/updating-object-properties.md

---
id: 56bbb991ad1ed5201cd392d1
title: Updating Object Properties
challengeType: 1
videoUrl: 'https://scrimba.com/c/c9yEJT4'
forumTopicId: 18336
dashedName: updating-object-properties
---

# --description--

After you've created a JavaScript object, you can update its properties at any time just like you would update any other variable. You can use either dot or bracket notation to update.

For example, let's look at `ourDog`:

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

Since he's a particularly happy dog, let's change his name to "Happy Camper". Here's how we update his object's name property: `ourDog.name = "Happy Camper";` or `ourDog["name"] = "Happy Camper";` Now when we evaluate `ourDog.name`, instead of getting "Camper", we'll get his new name, "Happy Camper".

# --instructions--

Update the `myDog` object's name property. Let's change her name from "Coder" to "Happy Coder". You can use either dot or bracket notation.

# --hints--

You should update `myDog`'s `"name"` property to equal "Happy Coder".

```js
assert(/happy coder/gi.test(myDog.name));
```

You should not edit the `myDog` definition.

```js
assert(/"name": "Coder"/.test(code));
```

# --seed--

## --after-user-code--

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

## --seed-contents--

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

// Only change code below this line
```

# --solutions--

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