Javascript正则表达式在开始处仅允许一个加号（+），并且字符串的长度不应超过15个字符数

Question

Hello All,
I want JavaScript regular expression which allow (+) sign once at start as well as whole length of string should not be more than 15 numeric character ie 0 to 9.

Answer 1

Try this:

/^\\+\\d{0,14}$/ - if yours string overall length should be maximum of 15 characters long /^\\+\\d{0,15}$/ - if you want '+' and no more than 15 0-9 characters

You can also experiment on http://regexr.com/