I have a variable in my scope:
$scope.myvar = "Hello<br><br>World"
In my template I use:
<div>{{myvar}}</div>
The issue is myvar shows the literal text, whereas I want it to show the line breaks. How to do this? Note that I want to make it such that if I in the future, myvar gets updated with other HTML, then what is shown on the page should be the "compiled" html as opposed to the literal string with the html tags in it.
You can use ngBindHtml for that.
Keep in mind that due to Angular's Strict Conceptual Escaping the content needs to be either sanitized (using the additonal module ngSanitize) or explicitely "trustedAsHtml" (using $sce.trustAsHtml()). The latter is supposed to be used only for content you know is safe (e.g. nothing user defined) and is not recommended anyway.
Note: ngSanitize is an non-core module and should be included separately:
<script src=".../angular.min.js"></script>
<script src=".../angular-sanitize.min.js"></script>
Examples:
/* Using ngSanitize */
angular.module('app', ['ngSanitize'])
.controller('myCtrl', function ($scope) {
$scope.myHtml = 'Hello<br /><br />world !';
});
/* Using $sce.trustAsHtml() */
angular.module('app', [])
.controller('myCtrl', function ($sce, $scope) {
$scope.myHtml = $sce.trustAsHtml('Hello<br /><br />world !');
});
Note that ngSanitize will filter "non-appropriate" content, while $sce.trustAsHtml will allow anything.
See, also, this short demo.
Use ng-bind-html within <div>. Here is the example:
In your html file :
<div ng-controller="ngBindHtmlCtrl">
<div ng-bind-html="myvar"></div>
</div>
In your js:
angular.module('ngBindHtmlExample', ['ngSanitize'])
.controller('ngBindHtmlCtrl', ['$scope', function ngBindHtmlCtrl($scope) {
$scope.myvar = 'Hello<br><br>World';
}]);
Example taken from AngularJs doc.
You can use ng-bind-html to bind to HTML directly. Here's the official documentation
#ExpertSystem is correct or if you're lazy like me you could do:
lrApp.directive('bindHtml', function () {
return {
restrict: 'A',
link: function (scope, elem, attrs) {
scope.$watch(attrs.bindHtml,function(nv,ov){
elem.html(nv);
});
}
};
});
1) Add the angular-sanitize.js library. This functionality used to be a part of the main library, but the Angular team has been splitting off sections to make it more modular.
2) Use the ng-bind-html tag:
<p ng-bind-html="myvar">
Related
We are using Angular 1.4.2 and I am trying to take a count value from a directive using ng-click, pass it to a function, then pass it up to the parent controller. After some effort it is working in a plunker, but unfortunately when I tried to move this functionality back into the main code, I'm not able to get a controller to bind to the isolated scope.
Should be simple, but I've tried injecting the current controller into the directive and trying to create a new controller, but nothing happens when I press click on the button.
Here is the code:
TEMPLATE:
<!DOCTYPE html>
<html>
<head>
<script data-require="angular.js#1.4.2" data-semver="1.4.2" src="https://code.angularjs.org/1.4.2/angular.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="script.js"></script>
</head>
<body>
<div id="app" ng-app="app">
<div ng-controller="mainCtrl">
<my-directive ctrl-fn="ctrlFn(count = count + 10)"></my-directive>
</div>
</div>
</body>
</html>
SCRIPT:
var app = angular.module('app', []);
app.controller('mainCtrl', function($scope){
$scope.count = 0;
$scope.ctrlFn = function() {
console.log('In mainCtrl ctrlFn!');
//$scope.count += 10; Old hardcoded value.
console.log("count is: " + JSON.stringify($scope.count));
//Call service here
};
});
app.directive('myDirective', function() {
return {
restrict: 'E',
scope: {
'ctrlFn' : '&'
},
template: "<div><button ng-click='ctrlFn()'>Click Here</button></div>",
link: function(scope, element, attributes) {
scope.ctrlFn(count);
}
};
});
Here is the template code I'm trying to modify in the main code base:
<div>
<div layout="row">
<results-loader ctrl-fn="ctrlFn(count = count + 10)"></results-loader>
<md-button class="md-raised md-primary md-button" ng-click="ctrlFn()" flex>Click Me</md-button>
</div>
</div>
and here is where I use an existing controller in my directive as a parent controller. It's defined in a route, rather than ng-controller and is already used for this view.
myresultsCtrl.$inject = ['$scope', ' myService'];
/* #ngInject */
function myresultsCtrl($scope, myService) {
$scope.count = 0;
etc...
however, it apparently isn't bound properly as I never hit the directive or this function with ng-click.
Like I said I tried adding a new controller to the template, then I tried injecting an existing controller into the directive, but neither worked. I took out the template from the directive and tried to put the ng-click directly into the template with ctrl-fn, but I wasn't sure how to wire up the click with the call to the ctrl-fn attribute of the directive with both in the template? The idea here is to move the template into it's own html file and reference it from the directive, as in: template: "myFile.html. I'm trying to enscapsulate as much as possible to make this into a reusable component.
I haven't worked much with custom directives.
Here is the direct link to the plunker.
I don't know your exact assignment, but rethink your architecture. Why do you want to count the value in the directive? In your simple case it would be better to count the value in a service or in the controller, not a directive.
Injecting controller in the directive is anti-angular pattern. You need to rethink your intentions. It is better to pass the number to the directive, make your calculations there and send your number back to the controller. It would work without extra code, because of the two-way data binding. Here a fork of your plunker:
http://plnkr.co/edit/KpB6bv5tHvXSvhErLcEp?p=preview
Main part is the definiton of the directive:
<div><span>{{count}}</span><br /><button ng-click='myFunction()'>Calculate</button></div>
I prefer not to answer my own questions as that can have a negative appearance, but in this case, I don't know if I could have explained the question well enough to get the right answer. What was throwing me off was integrating my working plunker code into our existing code base.
Where I got stuck was how to setup the controller properly for this use case. Though I declared my controller, in the module and injected the controller as it was already bound to that view, I needed to define the controller in the directive itself. Once I did all three together, everything started working.
Here are some code snippets:
angular.module('directiveName', [])
.directive('directiveName', directiveName)
.controller('injectedCtrl', injectedCtrl)
etc...
var directive = {
restrict: 'E',
scope: {
'ctrlFn' : '&'
},
template: "<div><button ng-click='ctrlFn()'>Click Here</button></div>",
controller: "injectedCtrl",
link: function(scope, element, attributes) {
scope.ctrlFn(); //This will pass to the parent controller: injectedCtrl, where $scope resides.
}
}
return directive;
}
injectedCtrl.$inject = ['$scope', 'myService'];
/* #ngInject */
function injectedCtrl($scope, myService) {
$scope.ctrlFn = function() {
//do something
}
etc...
HTML CODE:
When the button is clicked from the directive, ctrlFn here is a reference that is under my directives isolated scope in the DDO. This takes the external function that was passed in, namely: ctrlFn() which can then be invoked from the directive to call the parent controller.
<div layout="row">
<results-loader ctrlFn="ctrlFn()"></results-loader>
</div>
I'm posting this to help someone else that might have this use case as it was not easy to figure this out.
Dah Wahlins post goes into this subject in greater detail: Creating Custom AngularJS Directives Part 3 - Isolate Scope and Function Parameters and what helped to get my thinking straightened out.
I've included a Plunker here: http://plnkr.co/edit/4vqV8toHo0vNjtfICtzI?p=preview
I'm trying to add a button to the DOM and when clicked should execute the function bound to it. In this case it should alert "testing". Here is the code.
controller
app.controller('MainCtrl', function($scope, $sce) {
$scope.trustedHtml = $sce.trustAsHtml('<button ng-click="testAlert()">Submit</button>');
$scope.testAlert = function () {
alert('testing')
};
});
HTML
<body ng-controller="MainCtrl">
<div ng-bind-html="trustedHtml"></div>
</body>
$sce.trustAsHtml and ng-bind-html are not meant to build HTML with directives. This technique will not work.
This is because angular works by first compiling and then linking. See the conceptual overview for a good explaination.
In short, by the time you link the HTML defined in your trustAsHtml, it is too late for angular to compile (and therefore understand) the ng-click directive.
In order to dynamically add HTML, you should be looking at the $compile service (and/or directives). Docs are here.
For Angular 1.6.1, I found a solution that worked for me.
template:
<div ng-bind-html="trustAsHtml(content);" init-bind> </div>
In controller:
$scope.trustAsHtml = function(string) {
return $sce.trustAsHtml(string);
};
Directive:
.directive('initBind', function($compile) {
return {
restrict: 'A',
link : function (scope, element, attr) {
attr.$observe('ngBindHtml',function(){
if(attr.ngBindHtml){
$compile(element[0].children)(scope);
}
})
}
};
})
On page load the console log prints but the toggleClass/click won't work I even use angular.element but it has the same result.I need to change state in order for the toggleClass to work.I dunno what's wrong in my code.
.run(['$rootScope', function ($rootScope) {
console.log('test');//this prints test and it's ok
//this part won't load at the first loading of page.
$('.toggle-mobile').click(function(){
$('.menu-mobile').toggle();
$(this).toggleClass('toggle-click');
});
//....
}])
even doing it this way doesn't work.
$rootScope.$on('$viewContentLoaded', function () {
angular.element('.toggle-mobile').on('click', function (event) {
angular.element(this).toggleClass('toggle-click');
angular.element('.menu-mobile').toggle();
event.preventDefault();
});
});
The Angular way to render items is different from "On DOM Ready" that is why we need to treat these as 2 separate things.
Angular could render items later on even after DOM is ready, this could happen for example if there is an AJAX call($http.get) and that is why a directive may be the recommended approach.
Try something like this:
<body ng-controller="MainCtrl">
<div toggle-Me="" class="toggle-mobile"> Sample <div class="menu-mobile">Sample 2</div>
</div>
<script>
var myApp = angular.module('myApp', []);
myApp.controller('MainCtrl', ['$scope', function ($scope) {}]);
myApp.directive("toggleMe", function() {
return {
restrict: "A", //A - means attribute
link: function(scope, element, attrs, ngModelCtrl) {
$(element).click(function(){
$('.menu-mobile').toggle();
$(this).toggleClass('toggle-click');
});
}
};
});
...
By declaring the directive myApp.directive("toggleMe",... as an attribute toggle-Me="" every time angular generates the input element it will execute the link function in the directive.
Disclaimer: Since the post lacks from a sample html I made up something to give an idea how to implement the solution but of course the suggested html is not part of the solution.
I have some html data that I'm loading in from a json file.
I am displaying this html data by using ngSanitize in my app and using ng-bind-html.
Now I would like to convert any links in the json blob from the standard
link
to:
<a ng-click="GotoLink('some_link','_system')">link</a>.
So I'm doing some regExp on the json file to convert the links, but for some reason however ng-bind-html is filtering out the ng-click in it's output, and I can't figure out why. Is it supposed to do this, and if so is it possible to disable this behavior?
Check out this jsFiddle for a demonstration:
http://jsfiddle.net/7k8xJ/1/
Any ideas?
Ok, so the issue is that it isn't compiling the html you include (angular isn't parsing it to find directives and whatnot). Can't think of a way to make it to compile from within the controller, but you could create a directive that includes the content, and compiles it.
So you would change
<p ng-bind-html="name"></p>
to
<p compile="name"></p>
And then for the js:
var myApp = angular.module('myApp', ['ngSanitize']);
angular.module('myApp')
.directive('compile', ['$compile', function ($compile) {
return function(scope, element, attrs) {
scope.$watch(
function(scope) {
return scope.$eval(attrs.compile);
},
function(value) {
element.html(value);
$compile(element.contents())(scope);
}
)};
}]).controller('MyCtrl', function($scope) {
var str = 'hello http://www.cnn.com';
var urlRegEx = /((([A-Za-z]{3,9}:(?:\/\/)?)(?:[\-;:&=\+\$,\w]+#)?[A-Za-z0-9\.\-]+|(?:www\.|[\-;:&=\+\$,\w]+#)[A-Za-z0-9\.\-]+)((?:\/[\+~%\/\.\w\-]*)?\??(?:[\-\+=&;%#\.\w]*)#?(?:[\.\!\/\\\w]*))?)/g;
result = str.replace(urlRegEx, "<a ng-click=\"GotoLink('$1',\'_system\')\">$1</a>");
$scope.GotoLink = function() { alert(); }
$scope.name = result;
});
Angular 1.2.12: http://jsfiddle.net/7k8xJ/4/
Angular 1.4.3: http://jsfiddle.net/5g6z58yy/ (same code as before, but some people were saying it doesn't work on 1.4.*)
I still faced some issue with the compile, as that was not fulfilling my requirement. So, there is this, a really nice and easy hack to work around this problem.
We replace the ng-click with onClick as onClick works. Then we write a javascript function and call that on onClick event.
In the onClick function, we find the scope of the anchor tag and call that required function explicitly.
Below is how its done :)
Earlier,
<a id="myAnchor" ng-click="myControllerFunction()" href="something">
Now,
<a id="myAnchor" onClick="tempFunction()" href="something">
at the bottom or somewhere,
<script>
function tempFunction() {
var scope = angular.element(document.getElementById('myAnchor')).scope();
scope.$apply(function() {
scope.myControllerFunction();
});
}
</script>
This should work now. Hope that helps someone :)
For more info, see here.
Explicitly Trusting HTML With $sce
When you want Angular to render model data as HTML with no questions asked, the $sce service is what you’ll need. $sce is the Strict Contextual Escaping service – a fancy name for a service that can wrap an HTML string with an object that tells the rest of Angular the HTML is trusted to render anywhere.
In the following version of the controller, the code asks for the $sce service and uses the service to transform the array of links into an array of trusted HTML objects using $sce.trustAsHtml.
app.controller('XYZController', function ($scope, $sce) {
$sce.trustAsHtml("<table><tr><td><a onclick='DeleteTaskType();' href='#workplan'>Delete</a></td></tr></table>");
I'm using inline editing with CKEditor, and I'd like to bind an element to an angular scope value.
<div contentEditable="true">
<p>Here is the value: {{testval}}</p>
</div>
testval should update in the same manner as it would outside the editor.
To protect this text in the editor, I'd like to do something similar to the placeholder plugin. In other words I plan to have a placeholder, dynamically displaying the final text rather than just the placeholder.
I've seen several examples of how to bind the entire contents with angular, but not individual elements. I'm still fairly new to both angular and ckeditor, so any help or pointers would be much appreciated.
It sounds to me like you will need to use a directive for what you want. I might be soewhat off because I'm not completely familiar, but goig by what you've provided, let's assume this example.
html
<body ng-app="myApp">
<div content-editable content="content"></div>
</body>
javascript
angular.module('myApp', [])
.directive('contentEditable', function() {
restrict: 'A',
replace: true,
scope: {
// Assume this will be html content being bound by the controller
// In the controller you would have:
// $scope.content = '<div>Hello World</div>'
content: "="
},
template: '<div contentEditable="true"><p>Here is the value {{ content }}</p></div>'
});
Still not sure if I completely comprehend, but let me know if I'm getting closer.
I assume that you want to bind the HTML text in model to the element. I used ng-bind-html to render what is in the model and I created the directive ck-inline to add the inline feature and bind the model to the changes that happen in the inline editor. This directive requires a ng-bind-html to work and you also need to have ngSanitize added to your module. Add directive ck-inline to your element and
I also use $timeout because I noticed that if I don't the text is rendered and then ckeditor somehow deletes all the values which messes up the model (this does not happen with the non-inline option). Here is the code.
yourModule.directive('ckInline', ['$sce', '$timeout', function($sce, $timeout){
return{
require : '?ngBindHtml',
scope:{value:"=ngBindHtml"},
link : function(scope, elm, attr, ngBindHtml)
{
$timeout(function()
{
var ck_inline;
elm.attr("contenteditable", "true");
CKEDITOR.disableAutoInline = true;
ck_inline = CKEDITOR.inline(elm[0]);
if (!attr.ngBindHtml)
return;
ck_inline.on('instanceReady', function()
{
ck_inline.setData(elm.html());
});
function updateHtml()
{
scope.$apply(function()
{
scope.value = $sce.trustAsHtml(ck_inline.getData());
});
}
ck_inline.on('blur', updateHtml);
ck_inline.on('dataReady', updateHtml);
});
}
};
}]);