AngularJS local fallback for Google CDN.

snippet_localAngularFallbackFromCDN.htm

<!-- attempt to load AngularJS from CDN -->	
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular.min.js"></script>
		
<!-- if AngularJS fails to load fallback a local version -->
<script type="text/javascript">
if(!window.angular){
	var ang = document.createElement('script');
	//exlpicit path to server library copy
	ang.src = "//server.com/libs/angularjs/1.2.19/angular.min.js";
	// relative path
	// ang.src = "/libs/angularjs/1.2.19/angular.min.js";
	document.getElementsByTagName('head')[0].appendChild(ang);
}
</script>