FontAwesomeJS for Titanium to be work with: Labels and Buttons. Read first FokkeZB's documentations about the subject, just works :) https://github.com/FokkeZB/FontAwesomeJS

alloy.js

Alloy.Globals.fa = require('fa');

index.tss

".mylabel": {
	color: 'red',
	font: { fontFamily: 'FontAwesome', fontSize: 20 },
	text: Alloy.Globals.fa.list // IMPORTANT do not delete this property
}
 
 
".mybtn": {
	color: 'blue',
	font: { fontFamily: 'FontAwesome', fontSize: 20 },
	title: Alloy.Globals.fa.checkCircle // IMPORTANT do not delete this property
 
}

index.xml

<Alloy>
<Window id="index">
<Label class="mylabel" top="80" /><!-- IMPORTANT do not set  text="" atribute inline, that is defined in .tss file  -->
<Button class="mybtn" top="150" /><!-- IMPORTANT do not set  title="" atribute inline, that is defined in .tss file  -->
</Window>
</Alloy>

the button works, but not when places in a navigation/tool-bar

FokkeZB, that's correct!