freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/es6/write-concise-declarative-functions-with-es6.chinese.md

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---
id: 587d7b8b367417b2b2512b50
title: Write Concise Declarative Functions with ES6
challengeType: 1
videoUrl: ''
localeTitle: 用ES6编写简明的声明函数
---
## Description
<section id="description">在ES5中定义对象内的函数时我们必须使用关键字<code>function</code> ,如下所示: <blockquote> const person = { <br>名称:“泰勒”, <br> sayHellofunction{ <br>回来`你好!我的名字是$ {this.name} .`; <br> } <br> }; </blockquote>使用ES6您可以在定义对象中的函数时完全删除<code>function</code>关键字和冒号。以下是此语法的示例: <blockquote> const person = { <br>名称:“泰勒”, <br>问好() { <br>回来`你好!我的名字是$ {this.name} .`; <br> } <br> }; </blockquote></section>
## Instructions
<section id="instructions">重构对象<code>bicycle</code>内的函数<code>setGear</code>以使用上述简写语法。 </section>
## Tests
<section id='tests'>
```yml
tests:
- text: 未使用传统函数表达式。
testString: getUserInput => assert(!removeJSComments(code).match(/function/));
- text: <code>setGear</code>是一个声明函数。
testString: assert(typeof bicycle.setGear === 'function' && code.match(/setGear\s*\(.+\)\s*\{/));
- text: <code>bicycle.setGear(48)</code>应该返回48。
testString: assert((new bicycle.setGear(48)).gear === 48);
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='js-seed'>
```js
// change code below this line
const bicycle = {
gear: 2,
setGear: function(newGear) {
"use strict";
this.gear = newGear;
}
};
// change code above this line
bicycle.setGear(3);
console.log(bicycle.gear);
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>