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How to implement drag-and-drop upload of images using JavaScript

巴扎黑
Release： 2017-08-07 16:45:53
Original
2322 people have browsed it

This article mainly introduces the js drag-and-drop function to upload images for everyone. It has certain reference value. Interested friends can refer to

to directly pull local images to your settings. After the picture is successfully uploaded, it will be ok. The specific code is as follows


<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>标题</title>
<meta name="keywords" content="">
<meta name="description" content="">
<style>
 *{margin:0; padding:0; list-style:none;}
 #box{
  width: 600px;
  height: 300px;
  background: #ccc;
  padding: 50px;
 }
</style>
</head>
<body>

 <p id="box"></p>
 
<script>
var box=document.getElementById(&#39;box&#39;);
box.ondragover=function (e){
 e.preventDefault();
}
box.ondrop=function (e){
 e.preventDefault();
 // console.log(e.dataTransfer.files[0]);
 var f=e.dataTransfer.files[0];//获取到第一个上传的文件对象
 var fr=new FileReader();//实例FileReader对象
 fr.readAsDataURL(f);//把上传的文件对象转换成url
 fr.onload=function (e){
  console.log(e);
  // var Url=e.target.result;//上传文件的URL
  var Url=this.result;//上传文件的URL
  box.innerHTML+=&#39;<img src="&#39;+Url+&#39;" alt="">&#39;;
 }
}
</script>
</body>
</html>
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