js 实现下载音频

DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Documenttitle>
head>
<body>
  <button onclick="download()">下载button>
  <script>
    function downloadMp3(filePath) {
      fetch(filePath).then(res => res.blob()).then(blob => {
        const a = document.createElement('a');
        document.body.appendChild(a)
        a.style.display = 'none'
        const url = window.URL.createObjectURL(blob);
        a.href = url;
        a.download = 'xxxx.mp3';
        a.click();
        document.body.removeChild(a)
        window.URL.revokeObjectURL(url);
      });
    }
    function download() {
      this.downloadMp3('http://m10.music.126.net/20210830153737/455ba93f37a9ece83265d4cc72b0b99b/yyaac/obj/wonDkMOGw6XDiTHCmMOi/3064996091/2230/481a/669f/ea996fd708b9cbb995e5dfb5b27295c1.m4a');
    }
  script>
body>
html>

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