Develop audio player based on JavaScript

Develop audio player based on JavaScript

Overview:
In the modern Internet era, audio players have become part of people's daily entertainment. By using JavaScript, we can easily develop a powerful audio player with the flexibility to customize its appearance and behavior. This article will introduce you to how to develop a simple and practical audio player based on JavaScript, and provide code examples for your reference.

1. Create HTML structure and styles (HTML and CSS parts):
   First, we need to create a simple HTML structure to house the audio player. In this example, we will use the following HTML code:

<div id="audioPlayer">
  <div id="controls">
    <button id="playButton">播放</button>
    <button id="pauseButton">暂停</button>
  </div>
  <div id="progressBar">
    <div id="progress"></div>
    <div id="currentTime">00:00</div>
    <div id="duration">00:00</div>
  </div>
</div>

In order to give the player a certain style, we also need to add some CSS code:

#audioPlayer {
  width: 300px;
  border: 1px solid #ccc;
  padding: 10px;
}

#controls {
  margin-bottom: 10px;
}

#playButton, #pauseButton {
  background-color: #333;
  color: #fff;
  padding: 8px 16px;
  border: none;
  margin-right: 10px;
}

#progressBar {
  background-color: #f1f1f1;
  height: 20px;
  position: relative;
}

#progress {
  background-color: #333;
  height: 100%;
  width: 0;
}

#currentTime, #duration {
  position: absolute;
  top: 0;
  line-height: 20px;
  width: 60px;
  text-align: center;
}

2. Write JavaScript code (JavaScript part):
   In front-end development, playing audio usually uses the <audio></audio> tag. Through JavaScript, we can access the properties and methods of this tag and customize its behavior as needed. Let’s move on to writing the JavaScript code:

// 获取DOM元素
const audioPlayer = document.getElementById('audioPlayer');
const playButton = document.getElementById('playButton');
const pauseButton = document.getElementById('pauseButton');
const progress = document.getElementById('progress');
const currentTime = document.getElementById('currentTime');
const duration = document.getElementById('duration');

// 创建音频对象
const audio = new Audio();
audio.src = 'music.mp3'; // 替换成你的音频文件路径

// 播放按钮点击事件
playButton.addEventListener('click', function() {
  audio.play();
});

// 暂停按钮点击事件
pauseButton.addEventListener('click', function() {
  audio.pause();
});

// 更新进度条和当前播放时间
audio.addEventListener('timeupdate', function() {
  const progressPercentage = (audio.currentTime / audio.duration) * 100;
  progress.style.width = progressPercentage + '%';

  const minutes = Math.floor(audio.currentTime / 60);
  const seconds = Math.floor(audio.currentTime % 60);
  currentTime.textContent = `${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
});

// 更新总时长
audio.addEventListener('loadedmetadata', function() {
  const minutes = Math.floor(audio.duration / 60);
  const seconds = Math.floor(audio.duration % 60);
  duration.textContent = `${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
});

3. Summary:
   By using the above HTML, CSS and JavaScript code, we have successfully created a JavaScript-based audio player. The user can start playing the audio by clicking the "Play" button, or pause the playing of the audio by clicking the "Pause" button. The playback progress will be updated in real time, and the current playback time and total duration will be displayed.

This is just a simple example, you can further extend and customize this audio player according to your needs and ideas. Possible extensions include adding volume control, adding progress bar dragging functionality, etc. I hope this article provides you with some inspiration and can be useful in your projects.

The above is an example of developing an audio player based on JavaScript. I hope it will be helpful to you!

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