<button type="button" id="wadonedeal" class="btn secondary-grey whatsapp-button"><img src="/assets/icons/whatsapp-original-60.png" width="30" height="30" alt="whatsapp">WhatsApp</button>
JS
$('#wadonedeal, #wadonedeal2').click(function(){
var whatsAppPhone = '<?php echo $agentDet['contact']; ?>';
var defaultMessage = "Hi, I'm interested!";
window.open(
"https://wa.me/"+'+60'+whatsAppPhone+"?text="+defaultMessage+" "+window.location.href,
'_blank',
);
});