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js拖拽json文件实现获取json文件内容

js拖拽json文件实现获取json文件内容

作者: 清梦徐徐 | 来源:发表于2019-10-15 16:52 被阅读0次
image.png

结果:


image.png
<!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>Document</title>
  <style>
    #content {
      width: 500px;
      height: 500px;
      border: 1px solid rebeccapurple;
    }
  </style>
</head>

<body>
  <div id="content">
    <h2>文件拖入此处解析</h2>
  </div>
</body>
<script>
  let content = document.getElementById("content");

  function scanFiles(item) {
    console.log(item)
  }

  function handleDragOver(e) {
    e.stopPropagation();
    e.preventDefault();
    console.log("xxxxx")
    // console.log(e)
  }

  function handleFileSelect(e) {
    // e.stopPropagation();
    e.preventDefault();
    let item = e.dataTransfer;
    scanFiles(e);

    var files = [];
    [].forEach.call(e.dataTransfer.files, function (file) {
      files.push(file);
    }, false);

    for (var f of files) {
      var reader = new FileReader();
      reader.readAsText(f);
      //读取文件的内容
      reader.onload = function () {
          console.log("结果")
          console.log(this.result)
      };

    }


  }

  content.addEventListener("dragover", handleDragOver, false);
  content.addEventListener("drop", handleFileSelect, false);
</script>

</html>

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