Custom URL Scheme
WhatsApp provides a custom URL scheme to interact with WhatsApp:
If you have a website and want to open a WhatsApp chat with a pre-filled message, you can use our custom URL scheme to do so. Opening whatsapp://send?text= followed by the text to send, will open WhatsApp, allow the user to choose a contact, and pre-fill the input field with the specified text.
duration: 1000,
...
step: function (now) {
$this.text(now.toFixed(2));
}
