I was expecting ng-class to at least do what a simple class does i.e. apply a css property. In the plunker example, if the replace ng-class with class, it works and I get the indent.
i.e. ng-class="indentLeft" doesn't work but class="indentLeft" does. What am I missing ?
See a simple plunker here: http://plnkr.co/edit/moLu0BmgEYVm3xFQDcw8?p=preview
ngClass requires an expression to evaluate.
ng-class="{'indentLeft' : (item == true)}"
The json structure is property name in '' is the class you want to apply and that property value detracted if it should be applied via true/false
String Expression
When you do this, ng-class="indentLeft" angularjs doesn't know that it is a string and most likely is trying to evaluate it from the scope.
If you wrap the property in '' and make it a string literal the plunker should work correctly
ng-class="\'indentLeft\'"
Updated plnkr
Related
Unable to dynamically change class on "ng-repeat" list with background image contained in "style.css". Tried suggested solutions such as "ng-style="{ 'backgound-image': 'image_name.jpg' }" directly onto the element without much luck.
The class would need to change conditionally.
ng-class to the rescue. Managed to achieve the conditional effect without needing to modify my "style.css".
Within my template "ng-repeat (item in productList)" i used the following, note your repeat will need to use the "track by $index" syntax:
<div ng-class="{ 'no' : 'image_off', 'yes': 'image_on' }[item.isOn]" ng-click="switchOnOff($index, item.productId, item.isOn); $event.stopPropagation();"></div>
NOTE: "$event.stopPropagation()" prevents the page submitting.
"image_off/image_on" refers to two different classes under my stylesheet. Each with their own respective background image.
In your controller use the following to action the event on the UI inside a function e.g "switchOnOff" :
$scope.productList[index].isOn = $scope.productList[index].isOn == 'no' ? 'yes' : 'no';
I have a problem with the ng-class directive : i want to dynamically add a class when the screen size is large or medium. From what i can tell the condition is not being evaluated when generating the html or something like that because in the controller i see the correct value but the needed class is not added.
$scope.deviceLocal= $rootScope.devicee;
$rootScope.$on('size-changed', function(event, args) {
$scope.deviceLocal = args.device;
});
and the html part
<label ng-class="{\'labelFloatRight\':deviceLocal == \'large\', \'labelFloatRight\':deviceLocal == \'medium\'}">
I escape the ' character because the label is inside a template formed with '.
Thanks,
Vio
The Class name is same in both cases. Change the class name according to deviceLocal value.
I have to track down a bug related to work of ng-class (sometimes it adds new value without removing old).
So I need a quick reference to see it's current value.
Is there any short (or not) way to bind that to the content?
I mean something like this:
<div ng-class="something">
{{ngClassValueDisplayedHere}}
</div>
I had exactly the same problem with ng-class not removing old value. After days of investigation it turned out that it was ngAnimate who was messing with class changes. removing it from angular module dependencies solved the problem (Angular 1.3).
ng-class can bind to many different things. From the documentation:
Expression to eval. The result of the evaluation can be a string representing
space delimited class names, an array, or a map of class names to boolean
values. In the case of a map, the names of the properties whose values
are truthy will be added as css classes to the element.
So in your example, just display whatever your something is. It's supposed to be an angular expression, which can be evaluated like any other with double-curlies. This will help you debug your ng-class
<div ng-class="something">
{{something}}
</div>
Demo
In case someone else stumbles upon this problem like I did just recently with angular version 1.5.8: https://github.com/angular/angular.js/issues/14582
P.S. Update to 1.5.11 solved the issue related to ngAnimate, prior versions still had the same issue.
I have a HTML-Document containing moustache expressions that angular-dart evaluates very well:
</head>
<body ng-cloak>
<ctrlTextElements>
<div id="stage">outside: {{ctrlTextElements.test1('three')}}</div>
</ctrlTextElements>
I want to dynamicaly add some HTML with moustache expression like so:
CtrlTextElements.addTextElement(mousePos.x, mousePos.y);
var div = dom.querySelector('#stage');
HttpRequest.getString("../path/text.html").then((r) {
div.children.add(new Element.html(r, validator: new AllowAllValidator()));
});
The content of the added text.html looks like this:
<div>inside: (not evaluated): {{ctrlTextElements.test1('three')}}</div>
That's the result in the browser:
outside: three
inside: (not evaluated):{{ctrlTextElements.test1('three')}}
How can I reevaluate the moustache expressions inside content that has been applied after the page was loaded?
The problem is that you are mixing jQuery like logic with angular logic here : manipulating the dom 'by hand' is rarely a good solution.
The problem here is that your newly added binding has not been compiled by angularjs = it has not been indexed as a directive that should be watched for and updated when scope changes.
Either you try a more angular way, for example using ng-hide or ng-repeat directive to display your content according to the controllers $scope (or another custom directive), or you try to $compile your newly added directive ( but this is bad ) : https://docs.angularjs.org/api/ng/service/$compile .
Maybe try in your controller :
$scope.$compile( div );
Not sure of the syntax though. Maybe you would need to write
<span ng-bind="..."></span>
instead of
{{ ... }}
to make it work.
#Alexhv is right. Sorry for my previous answer. I assumed it is about Polymer. Was already time for bed.
You can find a code example in my answer to this question: setInnerHtml doesn't evaluate Mustache
The pub package bwu_angular (http://pub.dartlang.org/packages/bwu_angular) contains this code as a Decorator (Directive) named bwu-safe-html
I have the component and have a problem setting the css class to it.
I want it to always have a class of "box", then to have additional classes specified by the directive "class" argument and one conditional class "mini".
Conceptually what I want to achieve is something like this:
<div class="box {{class}}" data-ng-class="{mini: !isMaximized}">
...
</div>
The problem is that when I set the class html attribute, the ng-class attribute is omitted.
How to make my example work without changing the controller? Is it even possible, or should I set the class in the controller instead (which I wish to avoid)?
A quick solution would be define the box class inside ng-class attribute:
<div data-ng-class="{mini: !isMaximized, box: true}"></div>
If you want to include a scope variable as a class, you can't use ng-class:
<div class="{{class}} box {{!isMaximized && 'mini' || ''}}">
Angular expressions do not support the ternary operator, but it can be emulated like this:
condition && (answer if true) || (answer if false)
I needed multiple classes where one was $scope derived and others were literal classes. Thanks to the hint from Andre, below worked for me.
<h2 class="{{workStream.LatestBuildStatus}}"
ng-class="{'expandedIcon':workStream.isVisible, 'collapsedIcon':!workstream.isvisible}">{{workStream.Name}}</h2>
Edit: for newer versions of Angular see Nitins answer as it is the best one atm
For me, this worked (I'm working on AngularJS v1.2.14 at the moment so I guess 1.2.X+ should support this, not sure about the earlier versions):
<div class="box" data-ng-class="{ {{myScopedObj.classesToAdd}}: true, mini: !isMaximized }"></div>
I replaced your {{class}} with {{myScopedObj.classesToAdd}} to show that any scoped variable or even a bit more complex object can be used this way.
So, every DIV element crated this way will have "box" class and any class contained within myScopedObj.classesToAdd (useful when using ng-repeat and every element in the array needs to have a different class applied), and it will have the "mini" class if !isMaximized.
Another way to do this without double curly braces and includes scope variables, tested with angular v1.2+.
<div ng-class="['box',
aClass,
{true:'large': false: 'mini'}[isMaximized]]"></div>
It's also rather nice because the variable can use different types as a index without increasing complexity using ternaries. It can also remove any need for negations ;)
Here is a fiddle link
You can use simple expression given below
ng-class="{'active' : itemCount, 'activemenu' : showCart}"