前端实现粘贴图片预览的功能 

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<style>
  #past-contener{
    /* width: 300px; */
    height: 900px;
  }
</style>
<body>
  <div id="past-contener"></div>
  <script>

const el=document.getElementById('past-contener');
el.addEventListener('paste',function(e){
  let file=null
  const items=(e.clipboardData||window.clipboardData).items;
  if(items&&items.length){
    for(let i=0;i<items.length;i++){
      if(items[i].type.indexOf('image')!==-1){
        file=items[i].getAsFile()
        break
      }
    }
  }
  console.log(file,'file');
  if(file){
    var reader=new FileReader()
    reader.onload=function(event){
      let img=document.createElement('img')
      img.src=event.target.result;
      el.appendChild(img)
    }
    reader.readAsDataURL(file)
  }

})
  </script>

</body>
</html>
posted @ 2022-11-26 20:02  7c89  阅读(70)  评论(0)    收藏  举报