isValidNumber
isValidNumber(number) is used to checks whether a phone number matches a valid pattern.
Usage
Using Standard JavaScript:
// Create an instance of PhoneNumberUtil
const phoneUtil = require('libphonenumbers').PhoneNumberUtil.getInstance();
// Parse number with US country code and keep raw input
const number = phoneUtil.parseAndKeepRawInput('202-456-2121', 'US');
// Get is valid number
console.log(phoneUtil.isValidNumber(number));
// true
Using ECMAScript (ES):
import libphonenumbers from 'libphonenumbers';
// Create an instance of PhoneNumberUtil
const phoneUtil = libphonenumbers.PhoneNumberUtil.getInstance();
// Parse number with US country code and keep raw input
const number = phoneUtil.parseAndKeepRawInput('202-456-2121', 'US');
// Get is valid number
console.log(phoneUtil.isValidNumber(number));
// true