Learn smart assistants and voice interaction in JavaScript

Learning smart assistants and voice interaction in JavaScript requires specific code examples

In recent years, the rapid development of artificial intelligence technology has made smart assistants and voice interaction a reality . As a popular front-end programming language, JavaScript can also use related libraries and APIs to implement smart assistant and voice interaction functions. This article will introduce how to use JavaScript to implement smart assistants and voice interaction, and provide detailed code examples.

1. Implementation of the intelligent assistant function

1. Creating greeting words and farewell words

Intelligent assistants generally give out words when the user enters or leaves the page Greetings and farewells accordingly. We can use JavaScript's addEventListener method to listen for page load events, and the unload event to listen for page exit events.

window.addEventListener('load', function() {
  // 页面加载事件，显示迎接词
  console.log('欢迎来到我的网站！');
});

window.addEventListener('unload', function() {
  // 页面离开事件，显示告别词
  console.log('谢谢光临，期待下次再见！');
});

2. Implementing the Q&A function of the intelligent assistant

The intelligent assistant can answer corresponding questions based on the user's questions. A simple way to do this is to use conditional statements and functions.

function chat(question) {
  switch (question) {
    case '你好':
      return '你好，有什么可以帮助你的吗？';
    case '今天天气如何？':
      return '今天天气晴朗，气温适宜。';
    case '你叫什么名字？':
      return '我叫小助手。';
    default:
      return '抱歉，我不知道该如何回答。';
  }
}

console.log(chat('你好')); // 输出：你好，有什么可以帮助你的吗？
console.log(chat('今天天气如何？')); // 输出：今天天气晴朗，气温适宜。
console.log(chat('你叫什么名字？')); // 输出：我叫小助手。

3. Add voice recognition function

Smart assistants can also implement voice recognition functions, and users can interact with the assistant using voice instead of text. Modern browsers provide the SpeechRecognition interface, which can be used to implement simple speech recognition.

if ('SpeechRecognition' in window || 'webkitSpeechRecognition' in window) {
  var recognition = new (window.SpeechRecognition || window.webkitSpeechRecognition)();
  recognition.lang = 'zh-CN'; // 设置语言为中文
  
  recognition.onresult = function(event) {
    var result = event.results[0][0].transcript;
    console.log('你说：' + result);

    var response = chat(result);
    console.log('助手回答：' + response);
  }

  recognition.start();
} else {
  console.log('您的浏览器不支持语音识别功能。');
}

2. Implementation of voice interaction function

1. Add speech synthesis function

Voice interaction is not only speech recognition, but also requires speech synthesis to Convert text to speech for answers. JavaScript provides the SpeechSynthesis interface to implement the speech synthesis function.

function speak(text) {
  var utterance = new SpeechSynthesisUtterance(text);
  utterance.lang = 'zh-CN'; // 设置语言为中文
  
  speechSynthesis.speak(utterance);
}

speak('你好，有什么可以帮助你的吗？');

2. Implementing the voice command function

Voice interaction is not only questions and answers, but also can realize some specific functions through voice commands. For example, we can play music through voice commands.

function playMusic() {
  // 播放音乐的逻辑
}

function stopMusic() {
  // 停止音乐的逻辑
}

recognition.onresult = function(event) {
  var result = event.results[0][0].transcript;
  console.log('你说：' + result);

  if (result === '播放音乐') {
    playMusic();
  } else if (result === '停止音乐') {
    stopMusic();
  } else {
    var response = chat(result);
    console.log('助手回答：' + response);
    speak(response);
  }
}

Summary

This article introduces how to use JavaScript to implement intelligent assistant and voice interaction functions, and provides detailed code examples. We hope to help readers understand and practice these technologies and create a more intelligent and convenient user experience. Of course, these are only a small part of the functions. Readers can expand and optimize themselves to achieve more powerful and personalized intelligent assistants and voice interaction systems.

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