angular ng-bind-html and directive within it - angularjs

Question

Plunker Link
I have a element which I would like to bind html to it.
<div ng-bind-html="details" upper></div>
That works. Now, along with it I also have a directive which is bound to the bound html:
$scope.details = 'Success! <a href="#/details/12" upper>details</a>'
But the directive upper with the div and anchor do not evaluate. How do I make it work?

Answer 1

I was also facing this problem and after hours searching the internet I read #Chandermani's comment, which proved to be the solution.
You need to call a 'compile' directive with this pattern:
HTML:
<div compile="details"></div>
JS:
.directive('compile', ['$compile', function ($compile) {
return function(scope, element, attrs) {
scope.$watch(
function(scope) {
// watch the 'compile' expression for changes
return scope.$eval(attrs.compile);
},
function(value) {
// when the 'compile' expression changes
// assign it into the current DOM
element.html(value);
// compile the new DOM and link it to the current
// scope.
// NOTE: we only compile .childNodes so that
// we don't get into infinite loop compiling ourselves
$compile(element.contents())(scope);
}
);
};
}])
You can see a working fiddle of it here

Answer 2

Thanks for the great answer vkammerer. One optimization I would recommend is un-watching after the compilation runs once. The $eval within the watch expression could have performance implications.
angular.module('vkApp')
.directive('compile', ['$compile', function ($compile) {
return function(scope, element, attrs) {
var ensureCompileRunsOnce = scope.$watch(
function(scope) {
// watch the 'compile' expression for changes
return scope.$eval(attrs.compile);
},
function(value) {
// when the 'compile' expression changes
// assign it into the current DOM
element.html(value);
// compile the new DOM and link it to the current
// scope.
// NOTE: we only compile .childNodes so that
// we don't get into infinite loop compiling ourselves
$compile(element.contents())(scope);
// Use un-watch feature to ensure compilation happens only once.
ensureCompileRunsOnce();
}
);
};
}]);
Here's a forked and updated fiddle.

Answer 3

Add this directive angular-bind-html-compile
.directive('bindHtmlCompile', ['$compile', function ($compile) {
return {
restrict: 'A',
link: function (scope, element, attrs) {
scope.$watch(function () {
return scope.$eval(attrs.bindHtmlCompile);
}, function (value) {
// Incase value is a TrustedValueHolderType, sometimes it
// needs to be explicitly called into a string in order to
// get the HTML string.
element.html(value && value.toString());
// If scope is provided use it, otherwise use parent scope
var compileScope = scope;
if (attrs.bindHtmlScope) {
compileScope = scope.$eval(attrs.bindHtmlScope);
}
$compile(element.contents())(compileScope);
});
}
};
}]);
Use it like this :
<div bind-html-compile="data.content"></div>
Really easy :)

Answer 4

Unfortunately I don't have enough reputation to comment.
I could not get this to work for ages. I modified my ng-bind-html code to use this custom directive, but I failed to remove the $scope.html = $sce.trustAsHtml($scope.html) that was required for ng-bind-html to work. As soon as I removed this, the compile function started to work.

Answer 5

For anyone dealing with content that has already been run through $sce.trustAsHtml here is what I had to do differently
function(scope, element, attrs) {
var ensureCompileRunsOnce = scope.$watch(function(scope) {
return $sce.parseAsHtml(attrs.compile)(scope);
},
function(value) {
// when the parsed expression changes assign it into the current DOM
element.html(value);
// compile the new DOM and link it to the current scope.
$compile(element.contents())(scope);
// Use un-watch feature to ensure compilation happens only once.
ensureCompileRunsOnce();
});
}
This is only the link portion of the directive as I'm using a different layout. You will need to inject the $sce service as well as $compile.

Answer 6

Best solution what I've found! I copied it and it work's exactly as I needed. Thanks, thanks, thanks ...
in directive link function I have
app.directive('element',function($compile){
.
.
var addXml = function(){
var el = $compile('<xml-definitions definitions="definitions" />')($scope);
$scope.renderingElement = el.html();
}
.
.
and in directive template:
<span compile="renderingElement"></span>