# 通过创建音乐播放器学习字符串和数组的基本方法 - Step 21

**URL:** <https://forum.freecodecamp.org/t/step-21/697523>\
**Category:** General\
**Tags:** chinese-中文\
**Created:** [June 26, 2024, 4:09pm UTC](https://forum.freecodecamp.org/t/step-21/697523 "2024-06-26T16:09:06Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![binglitoo](https://avatars.discourse-cdn.com/v4/letter/b/f17d59/32.png) [@binglitoo](https://forum.freecodecamp.org/u/binglitoo)\
**Post date:** [June 26, 2024, 4:09pm UTC](https://forum.freecodecamp.org/t/step-21/697523/1 "2024-06-26T16:09:06Z")

</div>

### 告诉我们发生了什么：

then interpolate song.title as the text. I don’t know how to solve it

### 到目前为止你的代码

```html
<!-- file: index.html -->

```

```css
/* file: styles.css */

```

```javascript
/* file: script.js */
// User Editable Region

<button class="playlist-song-info"><span class="playlist-song-title">"${song.title}"</sapn></button>

// User Editable Region

```

### 你的浏览器信息：

用户代理是： `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36 Edg/126.0.0.0`

### 挑战信息：

通过创建音乐播放器学习字符串和数组的基本方法 - Step 21

> **[freeCodeCamp.org](https://www.freecodecamp.org/chinese/learn/javascript-algorithms-and-data-structures-v8/learn-basic-string-and-array-methods-by-building-a-music-player/step-21)**
>
> 免费学习编程

---

<div class="post-metadata">

**Author:** ![ILM](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/ilm/32/363239_2.png) [@ILM](https://forum.freecodecamp.org/u/ILM)\
**Post date:** [June 26, 2024, 4:30pm UTC](https://forum.freecodecamp.org/t/step-21/697523/2 "2024-06-26T16:30:36Z")

</div>

without quotes&nbsp;

---

<div class="post-metadata">

**Author:** ![binglitoo](https://avatars.discourse-cdn.com/v4/letter/b/f17d59/32.png) [@binglitoo](https://forum.freecodecamp.org/u/binglitoo)\
**Post date:** [June 26, 2024, 4:35pm UTC](https://forum.freecodecamp.org/t/step-21/697523/3 "2024-06-26T16:35:09Z")

</div>

Thank you,  
It passed

---

<div class="post-metadata">

**Author:** ![ILM](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/ilm/32/363239_2.png) [@ILM](https://forum.freecodecamp.org/u/ILM)\
**Post date:** [January 7, 2025, 2:08pm UTC](https://forum.freecodecamp.org/t/step-21/697523/4 "2025-01-07T14:08:42Z")

</div>

Closed on January 7, 2025, 2:08pm UTC