Button for cellular connection [closed]

You can use the URL scheme whatsapp:// in the href attribute of a hyperlink followed by the message that will be shared. For example:

<a href='whatsapp://send?text=testando 1 2 3'>Compartilhar "testando 123"</a>

If the user has the application installed, it will be initialized allowing a contact to be chosen next to a text field that allows editing the message before sending.

Because the browser is still not able to access WhatsApp the way it is done on mobile devices - this URL scheme is unknown - it may be interesting to hide that link and display it only on smaller screens:

/**
 * Tamanho somente para ilustrar! Tenha em mente que
 * a instalação do aplicativo não é restrita a smartphones.
 */
@media screen and (max-device-width: 860px)
  .compartilhar-whatsapp {
    display: block
  }
}

Some links in frequently asked questions about the application that cites the use of this custom url schema:

• FAQ Iphone
• Android FAQ

You can use tel: 000000000 . Ex:

<a href="tel:21912345678">ligar agora</a>