freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/reverse-a-string.md

---
id: a202eed8fc186c8434cb6d61
challengeType: 5
videoUrl: ''
title: 反转字符串
---

## Description
<section id="description">反转提供的字符串。您可能需要先将字符串转换为数组，然后才能将其反转。您的结果必须是字符串。如果卡住，请记得使用<a href="https://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck-coding/19514" target="_blank">Read-Search-Ask</a> 。编写自己的代码。 </section>

## Instructions
<section id="instructions">
</section>

## Tests
<section id='tests'>

```yml
tests:
  - text: <code>reverseString(&quot;hello&quot;)</code>应该返回一个字符串。
    testString: assert(typeof reverseString("hello") === "string");
  - text: <code>reverseString(&quot;hello&quot;)</code>应该变成<code>&quot;olleh&quot;</code> 。
    testString: assert(reverseString("hello") === "olleh");
  - text: <code>reverseString(&quot;Howdy&quot;)</code>应该变成<code>&quot;ydwoH&quot;</code> 。
    testString: assert(reverseString("Howdy") === "ydwoH");
  - text: <code>reverseString(&quot;Greetings from Earth&quot;)</code>应返回<code>&quot;htraE morf sgniteerG&quot;</code> 。
    testString: assert(reverseString("Greetings from Earth") === "htraE morf sgniteerG");

```

</section>

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

<div id='js-seed'>

```js
function reverseString(str) {
  return str;
}

reverseString("hello");

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```

/section>