Layui를 사용하여 드래그 앤 드롭 정렬 이미지 업로드 기능을 개발하는 방법

<div class="upload-container">
  <div class="uploaded-list" id="uploaded-list"></div>
  <div class="drop-area">
    <div class="drop-text">将图片拖拽到此处上传</div>
    <div class="upload-button">点击上传图片</div>
    <input type="file" id="file-input" multiple="multiple" style="display: none;">
  </div>
</div>

.upload-container {
  width: 500px;
  margin: 0 auto;
  padding: 20px;
  box-sizing: border-box;
}

.uploaded-list {
  margin-bottom: 20px;
}

.drop-area {
  border: 1px dashed #ccc;
  height: 200px;
  text-align: center;
  line-height: 200px;
  background: #f7f7f7;
  cursor: pointer;
  position: relative;
}

.drop-text {
  color: #999;
}

.upload-button {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  text-align: center;
  line-height: 200px;
  cursor: pointer;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  display: none;
}

.upload-button:hover {
  background: rgba(0, 0, 0, 0.7);
}

<script>
layui.use('upload', function(){
  var upload = layui.upload;

  //执行实例
  var uploadInst = upload.render({
    elem: '#file-input', //绑定元素
    url: '/upload', //上传接口
    data: {}, //可选项，额外的参数
    multiple: true, //是否允许多文件上传
    done: function(res){
      //上传完毕回调
      console.log(res);
    },
    error: function(){
      //请求异常回调
    }
  });

  //拖拽上传
  var dropArea = document.querySelector('.drop-area');
  var uploadButton = document.querySelector('.upload-button');
  var fileInput = document.querySelector('#file-input');

  dropArea.addEventListener('dragover', function(e) {
    e.preventDefault();
    this.classList.add('highlight');
  });

  dropArea.addEventListener('dragleave', function(e) {
    e.preventDefault();
    this.classList.remove('highlight');
  });

  dropArea.addEventListener('drop', function(e) {
    e.preventDefault();
    this.classList.remove('highlight');
    fileInput.files = e.dataTransfer.files;
    uploadButton.click();
  });

  //显示已上传的图片
  uploadInst.config.done = function(res) {
    var uploadedList = document.querySelector('.uploaded-list');
    var img = document.createElement('img');
    img.src = res.url;
    uploadedList.appendChild(img);
  };
});
</script>