Validate Phonenumbers

Example:
<html>
    <head>
        <title>libphonenumber-js</title>
        <meta charset="UTF-8">

        <!--        <script src="https://unpkg.com/libphonenumber-js@[version]/bundle/libphonenumber-[type].js"></script> -->
        <script src="https://unpkg.com/libphonenumber-js@1.x/bundle/libphonenumber-min.js"></script>

    </head>
    <body>
        <script>
            checknumber = libphonenumber.parsePhoneNumber('00  44 1234 567 890','GB')
            alert(checknumber.country+" "+checknumber.formatInternational() + " Valid:"+checknumber.isValid() + " Possible:"+checknumber.isPossible())
        </script>
    </body>
</html>