compile angularjs template
angular.module("myModule", [])
.controller("myController", ['$scope', '$compile', function ($scope, $compile) {
$scope.txt = "<b>SampleTxt</b>";
$scope.submit = function () {
var html = $compile($scope.txt)($scope);
angular.element(document.getElementById("display")).append(html);
}
}]);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<body ng-app="myModule" >
<div ng-controller="myController">
<textarea ng-model="txt" ></textarea>
<input type="button" value="submit" ng-click="submit()" />
<div id="display"></div>
</div>
</body>