First, I want to use ng-if to check if the string contains others substring "#teamA" or "#teamB" like:

```
<ion-item ng-if="msg.indexOf("#teamA") > -1" class="teamA">            
    {{msg}}
</ion-item>
<ion-item ng-if="msg.indexOf("#teamB") > -1" class="teamB">            
    {{msg}}
</ion-item>

```

This code is not working.
Secondly, I want each {{msg}} to have different assigned class (teamA and teamB). Am I on the right way to do that (if my ng-if works)?