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jQuery implements local preview of images before uploading

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Release： 2018-05-11 13:52:27
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This time I will bring you jQuery implementationLocal preview before uploadingPictures, what are the notes of jQuery implementation of local preview of pictures before uploading, the following are Let’s take a look at practical cases. 

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>www.jb51.net jquery上传图片本地预览效果</title>
</head>
<body>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.2.min.js"></script>
<input id="upload" type="file">
<img id="preview" src="">
<script type="text/javascript">
$('#upload').change(function(){
  // 获取FileList的第一个元素
  alert(document.getElementById('upload').files[0]);
  var f = document.getElementById('upload').files[0];
  src = window.URL.createObjectURL(f);
  document.getElementById('preview').src = src
})
</script>
</body>
</html>
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Operation effect:

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Related labels：
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