4 examples of 'regex for us phone number' in JavaScript

1
function formatPhoneNumber(phoneNumberString: string) {
2
  var cleaned = ("" + phoneNumberString).replace(/\D/g, "");
3
  var match = cleaned.match(/^(1|)?(\d{3})(\d{3})(\d{4})$/);
4
5
  if (match) {
6
    var intlCode = match[1] ? "+1 " : "";
7
    return [intlCode, "(", match[2], ") ", match[3], "-", match[4]].join("");
8
  }
9
10
  return phoneNumberString;
11
}

42
public getDigits(phone: string): string {
43
  const numbers = phone.match(/\d+/g)
44
  if (numbers === null) return ''
45
  return numbers.join('')
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}

267
function formatPhone(ph) {
268
	var numbers = ph.replace(/\D/g, ''),
269
		char = {
270
			0: '(',
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			3: ') ',
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			6: ' - '
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		};
274
	if (numbers.length !== 10) return false;
275
	var ret = '';
276
	for (var i = 0; i < numbers.length; i++) {
277
		ret += (char[i] || '') + numbers[i];
278
	}
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	return ret;
280
}

40
function isValidPhone(value) {
41
  return /^[0-9]+$/ig.test(value)
42
}