文件上传FileReader()base64

FileReader() base64

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <input id="upteainput_index" type="file">
</body>
  
<script>
	let uploadFile;

    $("#upteainput_index").change(function () {
        uploadFile = $("#upteainput_index")[0].files[0];
        console.log(uploadFile)

        //创建文件读取对象
        var reader = new FileReader();
        reader.readAsDataURL(uploadFile);

        //文件读取完毕
        reader.onload = function(){
            console.log(this.result)
        }
    });  
</script>
</html>