将本地图片转成base64 

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<input type="file" id="inp">
<img id="img">
<script>
  document.getElementById("inp").onchange = function () {
    var file = this.files[0];
    var a = new FileReader();
    a.onload = function (e) {
      console.log(e);
      var base64 = e.target.result;
      document.getElementById("img").src = base64
    }
    a.error = function () {
      console.log("失败");
    }
    a.readAsDataURL(file);
  }
</script>
</body>
</html>
posted @ 2019-09-05 09:23  松歌  阅读(2537)  评论(0)  编辑  收藏  举报