js模拟弹框选择文件夹

                var inputObj = document.createElement(‘input‘);
                inputObj.setAttribute(‘id‘, ‘_ef‘);
                inputObj.setAttribute(‘type‘, ‘file‘);
                inputObj.setAttribute("style", ‘visibility:hidden‘);
                document.body.appendChild(inputObj);
                inputObj.click();
                //选择
                $(inputObj).change(function () {

                }