Bookmarklet for sending WS message to a selected phone number from the Web.

whatsappp-this-number.js

javascript:(function () {
    "use strict";
    var defaultCountryCode = '49';
    var phoneRegexp = /^\(?(?:00|\+?)?([0-9]{2})?\)?[-. ]?([0-9])[-. ]?([0-9]{3})[-. ]?([0-9]{4})$/;

    var isPhone = function (text) {
        return !!text.match(phoneRegexp);
    };

    var normalizePhone = function (phoneText) {
        var groups = phoneText.match(phoneRegexp);
        var countryCode = groups[1] != undefined ? groups[1] : defaultCountryCode;
        var phoneNumber = countryCode + groups[2] + groups[3] + groups[4];
        return phoneNumber;
    };

    var phoneNumber;
    var selectedText = window.getSelection().toString();
    if (isPhone(selectedText)) {
        phoneNumber = normalizePhone(selectedText);
    } else {
        phoneNumber = prompt('Phone: ', defaultCountryCode);
    }

    if (!!phoneNumber.match(/^[0-9]{10}$/)) {
        window.open(`https://web.whatsapp.com/send?phone=${phoneNumber}`, '_blank');
    } else {
        alert('Error: Bad phone format');
    }
})();

It is intended for desktop browsing, using https://web.whatsapp.com as a chat enabler. You are expected to have it linked to your phone.

Setup:

1. Change the defaultCountryCode value to the one that suits you.
2. Create a bookmark in your browser (tested so far with Google Chrome) and copy the content of this gist to the URL field.

Usage:

1. While browsing, select a relevant phone number from the web
2. Click on the bookmarklet you created
3. It will open a new tab/window with a chat for that number in web.whatsapp.com
4. Or, if the selection doesn't contain a phone number, it will give you a prompt to write it

Very handy Ictus 😄 👍 .