At times, AngularJs template tags fail to evaluate

Can anyone explain why the templating tag [[ opt.option ]] is not always evaluating to a value in this code snippet?

<span ng-repeat="opt in options">

<button  ng-click="button = [[ opt.option ]]" ng-class="{ active : button == [[ opt.option ]] } ng-cloak>

<i class="icon-tick visible-in-active" ></i>[[ opt.option ]]
</button>
</span>

Although the buttons are displaying names correctly, they are not becoming active when clicked. It seems that the templating tags for ng-click and ng-class are not functioning as expected. Can someone help me understand why?

Edit
I had to use [[]] instead of {{}} because I am working with Django, which also uses {{}}

I would like the functionality demonstrated in THIS example, where clicking on a button activates it while deactivating the previously active one. However, my current implementation can be viewed here.

Answer №1

When working with ng-click and ng-class in Angular, you can simplify your code by not using data binding operators. Just use:

<button ng-click="button = opt.option" ng-class="{ active : button == opt.option }">

It's important to note that the data binding operator in Angular is {{ }}, not [[ ]]. Also, make sure to close the opening button tag properly by adding '">'

Update - It has been brought to our attention that the binding operator can be customized, so this may not pose a problem.

Update - Here is an example plunk to demonstrate: http://plnkr.co/edit/t4hmRmJCI22bjqMe1Jc4?p=preview

Answer №2

Remember to utilize {{ }} instead of [[ ]]

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