Question

What would be the correct Javascript RegExp to validate the following string “900 – 09 999”
The string should only allow digits from 0 to 9, an hyphen and a space.

Thanks in advance

Answer 1

Always be precise when you explain what you want your regex to validate. Are the spaces and hyphens optional or not? This stuff matters. Anyway, this validates the strict format:

"\d{3} \- \d{2} \d{3}"

And this a less strict one:

"\d{3} ?\-? ?\d{2} ?\d{3}"