Can someone help me create this regex. I need it to check to see if the string is either entirely whitespace(empty) or if it only contains positive whole numbers. If anything else it fails. This is what I have so far.
/^\s*|[0-9][0-9]*/
6 Answers
This helped me. It matches empty string and any number you enter.
/^(|\d)+$/
Try here if you want: regex101.com
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