Match Phone Number JS Fundamentals

function matchPhoneNumber(numbers) {
    let pattern = /\+359([ |-])2?\1(\d{3})\1(\d{4})\b/g;
    let validNumbers = [];
    while ((validNum = pattern.exec(numbers)) !== null) {
        validNumbers.push(validNum[0]);
    }
    console.log(validNumbers.join(', '));
}