Simple copy to clipboard functionality in angular without any dependencies

demo.html

<!-- View it live here: http://codepen.io/anon/pen/waZOjB -->
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.4/angular.min.js"></script>
<script type="text/javascript" src="https://cdn.rawgit.com/JustMaier/6ef7788709d675bd8230/raw/3d39d50e66d8d77e05656ed7dd09298be7e86f1f/ngClickCopy.js"></script>
<script>
  angular.module('app', ['ngClickCopy'])
</script>

<div ng-app="app">
  <button ng-click-copy="Hello World">Copy</button>
</div>

ngClickCopy.js

'use strict';

angular.module('ngClickCopy', [])
.service('ngCopy', ['$window', function ($window) {
	var body = angular.element($window.document.body);
	var textarea = angular.element('<textarea/>');
	textarea.css({
		position: 'fixed',
		opacity: '0'
	});

	return function (toCopy) {
		textarea.val(toCopy);
		body.append(textarea);
		textarea[0].select();

		try {
			var successful = document.execCommand('copy');
			if (!successful) throw successful;
		} catch (err) {
			window.prompt("Copy to clipboard: Ctrl+C, Enter", toCopy);
		}

		textarea.remove();
	}
}])
.directive('ngClickCopy', ['ngCopy', function (ngCopy) {
	return {
		restrict: 'A',
		link: function (scope, element, attrs) {
			element.bind('click', function (e) {
				ngCopy(attrs.ngClickCopy);
			});
		}
	}
}])