HTML代码

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>网页录音</title>
  </head>
  <style>
    .btn {
      display: inline-block;
      line-height: 1;
      white-space: nowrap;
      background: #fff;
      border: 1px solid #dcdfe6;
      text-align: center;
      box-sizing: border-box;
      outline: none;
      margin: 0;
      font-weight: 500;
      padding: 12px 20px;
      color: #fff;
    }
    .record-start-btn {
      background-color: #409eff;
      border-color: #409eff;
    }
    .record-finish-btn {
      background-color: #f56c6c;
      border-color: #f56c6c;
    }
  </style>
  <body>
    <div class="app">
      <button class="record-start-btn btn">开始录音</button>
      <button class="record-finish-btn btn">结束录音</button>
      <audio controls class="audio-player"></audio>
    </div>
  </body>
</html>

JavaScript代码

<script>
      // 连接麦克风
      if (navigator.mediaDevices.getUserMedia) {
        const constraints = { audio: true };
        navigator.mediaDevices.getUserMedia(constraints).then(
          // 授权成功
          (stream) => {
            // 绑定开始录音按钮
            const recordStartBtn = document.querySelector(".record-start-btn");
            // 绑定结束录音按钮
            const recordFinishBtn =
              document.querySelector(".record-finish-btn");
            // 创建MediaRecorder空对象
            const mediaRecorder = new MediaRecorder(stream);
            var chunks = [];
            recordStartBtn.onclick = () => {
              console.log(mediaRecorder.state);
              if (mediaRecorder.state === "inactive") {
                mediaRecorder.start();
                mediaRecorder.ondataavailable = function (e) {
                  chunks.push(e.data);
                };
                console.log(chunks);
              } else {
                 alert('开启录音中')
              }
            };
            recordFinishBtn.onclick = () => {
              if (mediaRecorder.state == "recording") {
                mediaRecorder.stop();
                mediaRecorder.onstop = (e) => {
                  var blob = new Blob(chunks, {
                    type: "audio/ogg; codecs=opus",
                  });
                  chunks = [];
                  var audioURL = window.URL.createObjectURL(blob);
                  const audioSrc = document.querySelector(".audio-player");
                  audioSrc.src = audioURL;
                };
              }else{
                alert('没有开启录音')
              }
            };
          },
          () => {
            alert("授权失败！");
          }
        );
      } else {
        console.error("浏览器不支持 getUserMedia");
      }
    </script>

全部代码

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>实现在网页上录音</title>
  </head>
  <style>
    .btn {
      display: inline-block;
      line-height: 1;
      white-space: nowrap;
      background: #fff;
      border: 1px solid #dcdfe6;
      text-align: center;
      box-sizing: border-box;
      outline: none;
      margin: 0;
      font-weight: 500;
      padding: 12px 20px;
      color: #fff;
    }
    .record-start-btn {
      background-color: #409eff;
      border-color: #409eff;
    }
    .record-finish-btn {
      background-color: #f56c6c;
      border-color: #f56c6c;
    }
  </style>
  <body>
    <div class="app">
      <button class="record-start-btn btn">开始录音</button>
      <button class="record-finish-btn btn">结束录音</button>
      <audio controls class="audio-player"></audio>
    </div>

    <script>
      // 连接麦克风
      if (navigator.mediaDevices.getUserMedia) {
        const constraints = { audio: true };
        navigator.mediaDevices.getUserMedia(constraints).then(
          // 授权成功
          (stream) => {
            // 绑定开始录音按钮
            const recordStartBtn = document.querySelector(".record-start-btn");
            // 绑定结束录音按钮
            const recordFinishBtn =
              document.querySelector(".record-finish-btn");
            // 创建MediaRecorder空对象
            const mediaRecorder = new MediaRecorder(stream);
            var chunks = [];
            recordStartBtn.onclick = () => {
              console.log(mediaRecorder.state);
              if (mediaRecorder.state === "inactive") {
                mediaRecorder.start();
                mediaRecorder.ondataavailable = function (e) {
                  chunks.push(e.data);
                };
                console.log(chunks);
              } else {
                 alert('开启录音中')
              }
            };
            recordFinishBtn.onclick = () => {
              if (mediaRecorder.state == "recording") {
                mediaRecorder.stop();
                mediaRecorder.onstop = (e) => {
                  var blob = new Blob(chunks, {
                    type: "audio/ogg; codecs=opus",
                  });
                  chunks = [];
                  var audioURL = window.URL.createObjectURL(blob);
                  const audioSrc = document.querySelector(".audio-player");
                  audioSrc.src = audioURL;
                };
              }else{
                alert('没有开启录音')
              }
            };
          },
          () => {
            alert("授权失败！");
          }
        );
      } else {
        console.error("浏览器不支持 getUserMedia");
      }
    </script>
  </body>
</html>

原文链接：https://blog.csdn.net/weixin_49119584/article/details/121656343