I have developed a website which is mainly used in mobile phones.
I want to allow users to share information directly from the web page into WhatsApp.
Using UserAgent detection I can distinguish between Android and iOS.
I was able to discover that in order to implement the above in iOS I can use the URL:
Just saw it on a website and seems to work on latest Android with latest chrome and whatsapp now too! Give the link a new shot!
<a href="whatsapp://send?text=The text to share!" data-action="share/whatsapp/share">Share via Whatsapp</a>
Recheckt it today (17th April 2015): Works for me on ios 8 (iPhone 6, latest versions) Android 5 (Nexus 5, latest versions)