上传图转base64

<script>
function readAsDataURL(file, callback) {
    var reader = new FileReader();
    reader.onload = function (e) {
        callback({ name: file.name, base64Url: e.target.result });
    };
    reader.readAsDataURL(file);
}
function readImg(file, callback) {
    var fs = file.files;
    if (fs) for (var i = 0; i < fs.length; i++)readAsDataURL(fs[i], callback);
}
</script>
<input type="file" accept="image/*" multiple onChange="readImg(this,p=>console.log(p))"/>