This blog describes how to fiddle with angular to force it to load additional controllers after it has been bootstrapped:
http://www.bennadel.com/blog/2553-loading-angularjs-components-after-your-application-has-been-bootstrapped.htm
Of course, this is completely unsupported, and could be broken by changes to angular at any time.
But, here is an updated version of your code using this method:
var app = angular.module('app', [])
app.config(
function($controllerProvider, $provide, $compileProvider) {
// Since the "shorthand" methods for component
// definitions are no longer valid, we can just
// override them to use the providers for post-
// bootstrap loading.
console.log("Config method executed.");
// Let's keep the older references.
app._controller = app.controller;
app._service = app.service;
app._factory = app.factory;
app._value = app.value;
app._directive = app.directive;
app.controller = function(name, constructor) {
console.log("controller...");
console.log(name);
console.dir(constructor);
$controllerProvider.register(name, constructor);
return (this);
};
// Provider-based service.
app.service = function(name, constructor) {
$provide.service(name, constructor);
return (this);
};
// Provider-based factory.
app.factory = function(name, factory) {
$provide.factory(name, factory);
return (this);
};
// Provider-based value.
app.value = function(name, value) {
$provide.value(name, value);
return (this);
};
// Provider-based directive.
app.directive = function(name, factory) {
$compileProvider.directive(name, factory);
return (this);
};
});
app.controller('AppCtrl', function($scope, $http, $compile) {
$scope.someData = {};
$scope.loadTemplate = function() {
$http.get("template.html")
.then(function(r) {
// load in the html, including the script, which will be executed
$(".dynamic-content").html(
r.data
);
// compile the loaded html into an actual template and put it back where it was
$(".dynamic-content").html($compile($(".dynamic-content").html())($scope));
})
}
});
Note that I used jQuery to place the HTML into the DOM, causing the script to execute, then to grab the HTML back out of the DOM so it could be compiled, after which I placed it back in the DOM again.
Also, there is an undefined variable in your template.html, so I updated it to look like this:
<script>
console.log('begin')
angular.module('app')
.controller('TempCtrl', function ($scope) {
$scope.total = 0;
console.log('inside')
$scope.update = function () {
$scope.total += 1;
};
});
console.log('end')
</script>
<div ng-controller="TempCtrl">
<h2>About</h2>
<h3>{{total}}</h3>
<p>Testing the total</p>
<button ng-click="update()">Update</button>
</div>
Here is a working plunk: http://plnkr.co/edit/cB5N05
