Angular-UI Tabs: add class to a specific tab

Question

I want to create the following tabs with Angular UI:

So, I'm adding the styles based on Bootstap's class names/markup:

.nav-tabs > li.new > a {
  padding-top: 5px;
}
.nav-tabs > .new > a:after {
  content: "NEW";
  color: indianred;
  font-size: 10px;
  vertical-align: super;
  padding-left: 2px;
}

(As you can see I need to compensate padding on <a> a bit after I added super-scripted text, otherwise it is pushed down.)

Next, I have the following markup & code in html/js files:

HTML:
<tabset>
    <tab ng-repeat="tab in tabs" heading="{{ tab.title }}" active="tab.active" ><!-- ng-class="{new: tab.new}"-->
        <div ng-include="tab.page"></div>
    </tab>
</tabset>

JS:
var TabsDemoCtrl = function ($scope) {
  $scope.tabs = [
    { title:"Tab 1", content:"Dynamic content 1" },
    { title:"Tab 2", content:"Dynamic content 2", active: true, 'new': true }
  ];

};

So, what's left is making Angular add a class named "new" on the correct element based on tabs array definition above. Unfortunately, I failed to figure out how.

As you can see I tried ng-class="{new: tab.new}" (commented in html code), but this essentially breaks all class features, producing incorrect ng-class atrribute when viewing it in Dev Tools:

ng-class="{new: tab.new} {active: active, disabled: disabled}"

Here's the Plunkr.

TyndieRock · Accepted Answer · 2013-10-16 03:19:44Z

9

I'm not sure that you can apply ng-class to tabs like that. After trying and failing I decided to look at the bootstrap-ui source for tabs and made an interesting discovery related to the tab heading attribute. Apparently you can put html in the heading section if you place the tab-heading as a child to a tab element.

Check out the tabheading directive in here.

This is the example they show:

<tabset>
  <tab>
    <tab-heading><b>HTML</b> in my titles?!</tab-heading>
    And some content, too!
  </tab>
  <tab>
    <tab-heading><i class="icon-heart"></i> Icon heading?!?</tab-heading>
    That's right.
  </tab>
</tabset>

In your case I think you might be able to do something like this to get the same effect:

<tab ng-repeat="tab in tabs" active="tab.active">
    <tab-heading>{{tab.title}} <span ng-show="tab.new">new</span></tab-heading>
    <div ng-include="tab.page"></div>
</tab>

answered Oct 16, 2013 at 3:19

TyndieRock

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1 Comment

pavek Over a year ago

thanks for pointing the right direction. But KayakDave's answer really done the job.

KayakDave · Accepted Answer · 2013-10-16 03:59:17Z

6

@TyndieRock is right that you can't, as far as I'm aware, apply classes to bootstrap-ui tabs. Any ng-class is stripped and directly adding a class causes bad behavior and it blocks any attempt to inject into it.

I did see an issue posted on github asking for custom css support. So maybe someday.

@TyndieRock's solution gets you closer but doesn't get you all the way. Kudos for finding tab-heading. Although his syntax is just slightly off.

Here's what I think you'd want:

 <tabset>
    <tab ng-repeat="tab in tabs">
    <tab-heading ng-class="{new:tab.new}">{{tab.title}}</tab-heading>
        <div ng-include="tab.page"></div>
    </tab>
</tabset>

This will let style the text. But it doesn't work so well for your css content.

You might want to do your own custom tabs. It is a hassle but that'll give you the control you're looking for.

answered Oct 16, 2013 at 3:59

KayakDave

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2 Comments

stride Over a year ago

One can style the li and a tags that are generated, but not using the ng-class. Check out my solution at stackoverflow.com/a/21092713/968833

KayakDave Over a year ago

@stride It's a good point, that the newish ternary operator works- noting the ternary operator was added to Angular 1.1.5. This question was written prior to that- 1.0.8- so this wasn't an option then.

stride · Accepted Answer · 2014-01-13 15:24:20Z

6

This issue was driving me mad, so here is what i did to have custom tab heading styling. Works for Angular >= 1.1.5 as it is the only one to have ternary operator in expressions.

One needs to target the <tab> element and not tab heading. Unfortunatelly ng-class will not work and get mangled together with other ng-class directives from the templates.

If you try to target the tab heading element you will find that there is not much you can do with it. There are no parent selectors in CSS so there is no way to reach that anchor tag where most of the action is going on.

So to have the cookie and eat it: 1) have your styles target descending anchor tag that gets generated by bootstrap tab directive

2) apply the class using this obscure syntax:

 <tabset>
        <tab class="{{orderForm.detailsForm.$invalid ? 'invalid-tab' : 'valid-tab'}}">
            <div>CONTENT</div>
</tab>
</tabset>

Then it all works as expected and proper classes are added to the <li> that is a parent to the interesting <a> tag.

To sum up: When ng-class is misbehaving and has interpolation issues, try to be more direct.

hope that helps someone.

edited Jan 13, 2014 at 15:24

answered Jan 13, 2014 at 13:40

stride

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3 Comments

Sebastian Over a year ago

This is working, but I think ng-class should be supported by tabs :-D.

Naomi Over a year ago

What if we only have invalid-tab class? Can we use '' for the second case?

Naomi Over a year ago

Do you have valid-tab css?

Swaraj · Accepted Answer · 2013-11-27 21:30:21Z

0

I had the same problem today and got around it in a slightly hacky way. Whenever I determined that a specific tab needed a class added/removed from it, I simply used angular selectors to select my tab, and dynamically added/removed classes manually.

HTML
<tab class="errorTab" heading='error' active='explorer.hasError'>
  <div error-message class='errorTabSectionOuter'></div>
</tab>

JS
var errorTab = angular.element('.errorTab');
if($scope.explorer.hasError){
  errorTab.addClass('showErrorTabClass');
  errorTab.removeClass('hideErrorTabClass');
}
else{
  errorTab.addClass('hideErrorTabClass');
  errorTab.removeClass('showErrorTabClass');
}

answered Nov 27, 2013 at 21:30

Swaraj

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1 Comment

Sebastian Over a year ago

This is something for a directive, not for putting it inside a controller, because you are doing DOM-Selection which shouldn't be part of your view controller.

Scott · Accepted Answer · 2014-06-30 20:49:02Z

-1

Try adding an id to the DIV surrounding the tabs and then make your styles based on that. For example

<div id="myTabs">
 <tabset>.....</tabset>
</div>

And here is a style that makes the active tab a different color

#myTabs div li.active a {
  background-color: lightsteelblue;
}

answered Jun 30, 2014 at 20:49

Scott

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1 Comment

Sebastian Over a year ago

This doesn't fit the question, because he want's to apply a class to a tab heading to display New if the class matches. You are just using existing class for active tab, but that is not the answer to the question.

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