AngularJS with Bootstrap UI Tolltip (uib-tooltip), has three versions of tool-tip:
uib-tooltip, uib-tooltip-template and uib-tooltip-html
- uib-tooltip takes only text and will escape any HTML provided
- uib-tooltip-html takes an expression that evaluates to an HTML string
- uib-tooltip-template takes a text that specifies the location of the template
In my case, I opted for uib-tooltip-html and there are three parts to it:
- configuration
- controller
- HTML
Example:
(function(angular) {
//Step 1: configure $sceProvider - this allows the configuration of $sce service.
angular.module('myApp', ['uib.bootstrap'])
       .config(function($sceProvider) {
           $sceProvider.enabled(false);
       });
//Step 2: Set the tooltip content in the controller
angular.module('myApp')
       .controller('myController', myController);
myController.$inject = ['$sce'];
function myController($sce) {
    var vm = this;
    vm.tooltipContent = $sce.trustAsHtml('I am the first line <br /><br />' +
                                         'I am the second line-break');
    return vm;
}
 })(window.angular);
//Step 3: Use the tooltip in HTML (UI)
<div ng-controller="myController as get">
     <span uib-tooltip-html="get.tooltipContent">other Contents</span>
</div>
For more information, please check here