正则表达式允许3个数字，没有特殊字符和空格

Question

I am using a regex as /^-?(?:\\d+|\\d{1,3}(?:,\\d{3})+)?$/ which allow only 3 numbers and no special characters

I need to include space check as well. Please help me

Answer 1

I don't know why your regular expression is so complex. If you need three digits with no other characters, just use this:

/^[0-9]{3}$/

That will only validate strings that are three digits with nothing else, "324", "857", "111". You get it.

If you have other requirements, please update your question with them.