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

---
id: 56bbb991ad1ed5201cd392d3
challengeType: 1
videoUrl: 'https://scrimba.com/c/cDqKdTv'
forumTopicId: 17560
title: 删除对象的属性
---

## Description
<section id='description'>
我们同样可以删除对象的属性，例如：
<code>delete ourDog.bark;</code>
</section>

## Instructions
<section id='instructions'>
删除<code>myDog</code>对象的<code>"tails"</code>属性。
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: 从<code>myDog</code>中删除<code>"tails"</code>属性。
    testString: assert(typeof myDog === "object" && myDog.tails === undefined);
  - text: 不要修改<code>myDog</code>的初始化。
    testString: 'assert(code.match(/"tails": 1/g).length > 1);'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

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

delete ourDog.bark;

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

// Only change code below this line.


```

</div>


### After Test
<div id='js-teardown'>

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

</div>

</section>

## Solution
<section id='solution'>


```js
var ourDog = {
  "name": "Camper",
  "legs": 4,
  "tails": 1,
  "friends": ["everything!"],
  "bark": "bow-wow"
};
var myDog = {
  "name": "Happy Coder",
  "legs": 4,
  "tails": 1,
  "friends": ["freeCodeCamp Campers"],
  "bark": "woof"
};
delete myDog.tails;
```

</section>