如何定义字符串开头不存在的字符？

Question

var rgex= /^[\\+\\w.-]/ ;

This works for ss1 , s , s+ss . But I want to make sure its giving false for +san .

Answer 1

Choose the first character in a class that doesn't contain + :

var rgex= /^[\w.-][+\w.-]*/ ;

May be you want to anchor the end of the string:

var rgex= /^[\w.-][+\w.-]*$/ ;