js ajax上传文件

// js上传world
var fileM=document.querySelector("#uploadFile");
$("input[name=world]").change(function(){
    // console.log($("input[name=world]")[0].files);
    var formData = new FormData();
    // console.log($("#uploadFile")[0].files);
    var fileObj = fileM.files[0];
    formData.append('file',fileObj);
    // console.log(formData);
    $.ajax({
        url: "/admin/question/move_files.html",
        type: "POST",
        data: formData,
        dataType:"json",
        cache: false,
        contentType: false,
        processData: false,
        success: function(data) {
            console.log(data);
            if(data.status == 1){
                $("input[name=world_info]").val(data.info);
            }
            layer.msg(data.msg,{time:1500});
        },
        error: function(data) {
            layer.msg("网络错误",{time:1500});
        }

    })
})