title: how to open only whatsapp application when click on a hyperlink/image/button
body: <p>A code required for html website, when user open my website from mobile device and click on hyper link/image/button, then the link should open only whatsapp application.</p>
  
  <p>I only need to open whatsapp application when user click on a link in my html website. that's it.</p>
  
  <p>please share the code.</p>