AngularJs: How to decode HTML entities in HTML?

THE SITUATION:

I am bulding a webpage which content is taken calling an API that returns the data in json format.

The problem is that the html tags are given as HTML entities, that has to be decoded.

EXAMPLE:

This is example of the json i am dealing with:

<p align="justify"><strong>15<sup>th</sup> HERE THERE IS A BOLD TEXT </strong> HERE SOME NORMAL TEXT...

ATTEMPT:

I have spend time researching it and it seems harder than i thought. Looking in google and similar SO questions, a possible solution can be to use the ng-bing-html

Api call:

$http.get('http://API/page_content').then(function(resp) 
{
    $scope.content_test = resp.data[0].content; 
}

Filter:

.filter('trusted', ['$sce', function($sce){
    return function(text) {
        return $sce.trustAsHtml(text);
    };
}])

Ng-bind-html in the angular view:

<div ng-bind-html=" content_test  | trusted"></div>

OUTPUT:

This is the output in the view (exactly as you see it):

<p align="justify"><strong>15<sup>th<\/sup> HERE THERE IS A BOLD TEXT<\/strong> HERE SOME NORMAL TEXT...

but what i need to see is the text properly formatted:

HERE THERE IS A BOLD TEXT HERE SOME NORMAL TEXT...

THE QUESTION:

How can i decode HTML entities in a proper formatted HTML in AngularJs?

EDIT:

Both answers from @dfsq and @K.Toress are correct.

I choose the first one because it can be more re-usable.

But you may also consider to use the solution from @K.Toress

Add the angular.sanitize.js 

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.1/angular-sanitize.js"></script>

add the dependency as,

var app = angular.module('plunker', ['ngSanitize']);

NOW Decode the html string and pass it to ng-bind-html.

$http.get('http://API/page_content').then(function(resp) 
{
    var html = resp.data[0].content; 

    var txt = document.createElement("textarea");
    txt.innerHTML = html;


    $scope.content_test = txt.value;

    //if you use jquery then use below
    //$scope.content_test = $('<textarea />').html(html).text();        
}

<div ng-bind-html="content_test"></div>

I think you can avoid the filter see the below example.

example

I think you need to perform one more "decoding" step before you pass it to $sce. For example like this:

app.filter('trusted', ['$sce', function($sce) {
    var div = document.createElement('div');
    return function(text) {
        div.innerHTML = text;
        return $sce.trustAsHtml(div.textContent);
    };
}]);

Demo: http://plnkr.co/edit/LrT4tgYtTu4CPrOAidra?p=preview

Here you are, just use regex to replace \ character.

'<p align="justify"><strong>15<sup>th<\/sup>BOLD TEXT<\/strong>'.replace(/\\/g,'')

Hope this helps.