I am validate Phone Number. I would like to allow only (123) 123-1234
. But my code is also allowing 123 123-1234
. My Regex is like below.
var format = /^(?([0-9]{3}))?[ ]?([0-9]{3})[-]?([0-9]{4})$/;
Where is my mistake ?
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Answer
You have a ?
quantifier for (
and )
in your regex, which matches your parentheses for zero or one times. Simply removing it will do the trick.
var format = /^(([0-9]{3}))[ ]?([0-9]{3})[-]?([0-9]{4})$/;
Have a test for it here