jsdownload.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=0">
  <meta name="renderer" content="webkit">
  <title>商品*期免息价值计算</title>
  <meta name="description" content="首页描述"/>
  <meta name="keywords" content="首页关键词"/>
  <meta name="author" content="Web Layout:amu"/>
  <meta name="format-detection" content="telephone=no,date=no,address=no,email=no,url=no"/>
  <link rel="stylesheet" href="./src/style/base.css?v=1">

</head>
<body class="paper">

<button onclick="download('data.txt',JSON.stringify(data))">下载</button>
<script>
  function download(filename, text) {
    var pom = document.createElement('a');
    pom.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
    pom.setAttribute('download', filename);
    if (document.createEvent) {
      var event = document.createEvent('MouseEvents');
      event.initEvent('click', true, true);
      pom.dispatchEvent(event);
    } else {
      pom.click();
    }
  }
  var data = {
    a:11,
    b:[{a:1,b:3}]
  }
  
</script>
</body>
</html>