js下载逻辑

function downResultDtl(id) {
    
      var url = '这里写后台的下载接口';
      var fileName = "结果.xlsx";
      var form = $("<form></form>").attr("action", url).attr("method", "post");
      form.append($("<input></input>").attr("type", "hidden").attr("name", "fileName").attr("value", fileName));
      form.appendTo('body').submit().remove();
}