javascript - 带预览的图像上传上的删除按钮

Question

我想选择多个图像并为这些图像提供一个按钮，以便用户也可以删除图像。我可以预览图片，但无法在预览后删除图片。

这是我的javascript代码

function handleFileSelect(evt) {
    var files = evt.target.files; // FileList object

    // Loop through the FileList and render image files as thumbnails.
    for (var i = 0, f; f = files[i]; i++) {

      // Only process image files.
      if (!f.type.match('image.*')) {
        continue;
      }

      var reader = new FileReader();

      // Closure to capture the file information.
      reader.onload = (function(theFile) {
        return function(e) {
          // Render thumbnail.
          var span = document.createElement('span');
          span.innerHTML = ['<img class="thumb" src="', e.target.result,
                            '" title="', escape(theFile.name), '"/>'].join('');
          document.getElementById('list').insertBefore(span, null);
        };
      })(f);

      // Read in the image file as a data URL.
      reader.readAsDataURL(f);
    }
  }

  document.getElementById('files').addEventListener('change', handleFileSelect, false);

这是我的 HTML 代码，其中 id=list 是图像显示为缩略图的区域:

<div class="file-upload">
    <div class="file-select">
        <div class="file-select-button" id="fileName">Choose Image</div>
        <div class="file-select-name" id="noFile"></div>
        <input type="file" id="files" name="files[]" multiple />
    </div>
</div>
</div>
<div class="col-lg-12 col-md-12 col-xs-12 xol-sm-12">
    <output id="list"></output>
</div>

如何为每张图片插入删除选项？

Answer 1

检查这个https://jsfiddle.net/dp722j27/10/

你可以有这样的删除方法

function deleteImage() { 
    var index = Array.from(document.getElementById('list').children).indexOf(event.target.parentNode)
    document.querySelector("#list").removeChild( document.querySelectorAll('#list span')[index]);
    totalFiles.splice(index, 1);
    console.log(totalFiles)
}

和你的渲染方法一样

  var span = document.createElement('span');
  span.innerHTML = ['<img width=100 class="thumb" src="', e.target.result,
                    '" title="', escape(theFile.name), '"/>', "<button onclick='deleteImage()'>delete</button>"].join('');

  document.getElementById('list').insertBefore(span, null);

您可以将值存储在数组中并像处理它一样