Contenteditable with ng-model doesn't work - angularjs

Question

I'm trying to store the value of a contenteditable to my JS code. But I can't find out why ng-model doesn't work in this case.
<div ng-app="Demo" ng-controller="main">
<input ng-model="inputValue"></input>
<div>{{inputValue}}</div> // Works fine with an input
<hr/>
<div contenteditable="true" ng-model="contentValue"></div>
<div>{{contentValue}}</div> // Doesn't work with a contenteditable
</div>
Is there a workaround to do that ?
See : JSFiddle
Note: I'm creating a Text editor, so the user should see the result, while I'm storing the HTML behind it. (ie. user see: "This is an example !", while I store: This is an <b>example</b> !)

Answer 1

contenteditable tag will not work directly with angular's ng-model because the way contenteditable rerender the dom element on every change.
You have to wrap it with a custom directive for that:
JS:
angular.module('customControl', ['ngSanitize']).
directive('contenteditable', ['$sce', function($sce) {
return {
restrict: 'A', // only activate on element attribute
require: '?ngModel', // get a hold of NgModelController
link: function(scope, element, attrs, ngModel) {
if (!ngModel) return; // do nothing if no ng-model
// Specify how UI should be updated
ngModel.$render = function() {
element.html($sce.getTrustedHtml(ngModel.$viewValue || ''));
};
// Listen for change events to enable binding
element.on('blur keyup change', function() {
scope.$evalAsync(read);
});
read(); // initialize
// Write data to the model
function read() {
var html = element.html();
// When we clear the content editable the browser leaves a <br> behind
// If strip-br attribute is provided then we strip this out
if ( attrs.stripBr && html == '<br>' ) {
html = '';
}
ngModel.$setViewValue(html);
}
}
};
}]);
HTML
<form name="myForm">
<div contenteditable
name="myWidget" ng-model="userContent"
strip-br="true"
required>Change me!</div>
<span ng-show="myForm.myWidget.$error.required">Required!</span>
<hr>
<textarea ng-model="userContent"></textarea>
</form>
Source it from the original docs

Answer 2

Just move the read function call into $render
angular.module('customControl', ['ngSanitize']).
directive('contenteditable', ['$sce', function($sce) {
return {
restrict: 'A', // only activate on element attribute
require: '?ngModel', // get a hold of NgModelController
link: function(scope, element, attrs, ngModel) {
if (!ngModel) return; // do nothing if no ng-model
// Specify how UI should be updated
ngModel.$render = function() {
element.html($sce.getTrustedHtml(ngModel.$viewValue || ''));
read(); // initialize
};
// Listen for change events to enable binding
element.on('blur keyup change', function() {
scope.$evalAsync(read);
});
// Write data to the model
function read() {
var html = element.html();
// When we clear the content editable the browser leaves a <br> behind
// If strip-br attribute is provided then we strip this out
if ( attrs.stripBr && html == '<br>' ) {
html = '';
}
ngModel.$setViewValue(html);
}
}
};
}]);

Answer 3

Neither of the other answers worked for me. I needed the model's initial value to be rendered when the control was initialized. Instead of calling read(), I used this code inside the link function:
ngModel.$modelValue = scope.$eval(attrs.ngModel);
ngModel.$setViewValue(ngModel.$modelValue);
ngModel.$render()