ajax<input>标签文件异步上传

ajax代码

function uploadImg() {
    console.log($.fn);
    let formData = new FormData();
    formData.append("img",document.getElementById("goods_img").files[0]);
    $.ajax({
        url: "goods/upload",
        type:"post",
        data:formData,
        contentType:false,
        processData:false,
        dataType: "json",
        success: function (data) {
            console.log($.fn);
            $("#img_div").html(" ");
            let imgObg = $("<img>");
            imgObg.attr("src", "../../upload/goods/img/" + data.imgName);
            imgObg.attr("width", "60px");
            imgObg.attr("height", "60px");
            $("#img_div").append(imgObg);
        },
        error: function (data) {
            alert(data.messages);
        }
    })
}

界面代码

<input onchange="uploadImg()" id="goods_img" name="img" type="file" class="form-control-file" id="exampleFormControlFile">