JS中使用regex进行字符串验证

Question

我需要一个帮助框架正则表达式来验证Javascript中的字符串格式,

字符串的总长度应在3到30个字符之间.第一个字符必须严格按字母表.后续字符可以是字母或点或空格.请帮忙.

Answer 1

以下内容适合您.

var re = /^[a-z][a-z. ]{2,29}$/i

正则表达式:

^                # the beginning of the string
 [a-z]           # any character of: 'a' to 'z'
 [a-z. ]{2,29}   # any character of: 'a' to 'z', '.', ' ' (between 2 and 29 times)
$                # before an optional \n, and the end of the string