1. 手机号匹配：let reg = /^1(3|4|5|7|8)[0-9]{9}$/ let reg = /^1[0-9]{10}$/ let reg = /^[1][3,4,5,6,7,8,9][0-9]{9}$/ let reg = /^(13[0-9]|14[5|7]|15[0|1|2|3|4|5|6|7|8|9]|18[0|1|2|3|...