javascript - 删除选择的文件名以输入多个

Question

目前我的代码与这里的代码相同:How to display selected file names before uploading multiple files in Struts2?

如何将文件列表转换为数组并在每个文件名旁边添加删除链接并在上传前将其删除？

谢谢。

Answer 1

我会使用递归函数来做到这一点。请参阅以下解决方案:

function updateList () {

  var input = document.getElementById('file');
  // Create list or array
  var list = [];
  for (var i = 0, len = input.files.length; i < len; ++i) {
    list.push(input.files.item(i));
  }
  // Output file list
  outputList(list);
}

function outputList (list) {

  var output = document.getElementById('fileList');
  while (output.hasChildNodes()) {
    output.removeChild(output.lastChild);
  }
  
  var nodes = document.createElement('ul');
  for (var i = 0, len = list.length; i < len; ++i) (function(i) {
  
    var node = document.createElement('li');
    var filename = document.createTextNode(list[i].name);
    
    var removeLink = document.createElement('a');
    
    removeLink.href = 'javascript:void(0)';
    removeLink.innerHTML = 'Remove';
    removeLink.onclick = function () {
      // Remove item
      list.splice(i, 1);
      outputList(list);
    }
    
    node.appendChild(filename);
    node.appendChild(removeLink);
    nodes.appendChild(node);
  })(i);
  
  output.appendChild(nodes);
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="file" name="file" id="file" multiple 
       onchange="javascript:updateList()" />
<br/>Selected files:
<div id="fileList"></div>