103 lines
1.6 KiB
Markdown
103 lines
1.6 KiB
Markdown
---
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id: 56bbb991ad1ed5201cd392d3
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title: Delete Properties from a JavaScript Object
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cDqKdTv'
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forumTopicId: 17560
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localeTitle: 删除对象的属性
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---
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## Description
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<section id='description'>
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我们同样可以删除对象的属性，例如：
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<code>delete ourDog.bark;</code>
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</section>
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## Instructions
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<section id='instructions'>
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删除<code>myDog</code>对象的<code>"tails"</code>属性。
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: 从<code>myDog</code>中删除<code>"tails"</code>属性。
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testString: assert(typeof myDog === "object" && myDog.tails === undefined);
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- text: 不要修改<code>myDog</code>的初始化。
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testString: 'assert(code.match(/"tails": 1/g).length > 1);'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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// Example
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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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"bark": "bow-wow"
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};
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delete ourDog.bark;
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// Setup
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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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"bark": "woof"
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};
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// Only change code below this line.
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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(function(z){return z;})(myDog);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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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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"bark": "bow-wow"
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};
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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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"bark": "woof"
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};
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delete myDog.tails;
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```
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</section>
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