Angularjs ng-disable not working for anchor tag

Question

I am trying to disable a icon using angularjs in a ngrepeat scenarion. I am checking if owner is null then disbale icon. In my case icon is never disabled.

I tried printing {{item.owner == null}} which result in true.

what may be the issue and why is the icon not disabling?

<tr ng-repeat="item in items">
<td style="color: gray;" title="chat">                    
<a ng-href="sip:{{item.Email}}"  ng-disabled="{{item.owner == null}}">
<span class="glyphicon glyphicon-comment"></span>
</a>
</td>

Answer 1

AFAIK you cannot apply disabled on an anchor tag, but you can make it through styling. ngDisabled is commonly used over form controls.