vue的常见js书写操作 https://www.cnblogs.com/yanze/p/10361821.html 整数的数据类型限制 https://www.jianshu.com/p/8a2079fe5895 对输入的数据进行过滤限制 https://blog.csdn.net/lanyan1214/article/details/84924326 http://www.3qphp.com/web/javascript/5125.html http://www.manongjc.com/detail/14-dndhfejcytubacc.html https://blog.csdn.net/qq_39043923/article/details/88688420?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase 获取表单的元素