正则短例

验证微信ID:

var reg = /^[a-zA-Z][0-9a-zA-Z_-]{5,19}$/   

验证手机号：

/*
* 判断字符串是否符合手机号码格式
* 移动号段: 134,135,136,137,138,139,147,150,151,152,157,158,159,170,178,182,183,184,187,188
* 联通号段: 130,131,132,145,155,156,170,171,175,176,185,186
* 电信号段: 133,149,153,170,173,177,180,181,189
*/

let phoneNumReg = /^((13[0-9])|(14[5,7,9])|(15[^4])|(18[0-9])|(17[0,1,3,5,6,7,8]))\d{8}$/;

验证qq:

规则5~10位纯数字

首位非0

let qqReg = /^[1-9]\d{4,9}$/;

 1-7位大写字母

let reg = /^[A-Z]{1,7}$/;

 0 或者非0开头的纯数字

/^(0|[1-9][0-9]*)$/;