Angular ng-if directive does not evaluate conditional expression

Question

I am new to web dev and AngularJS. I am trying to use the ng directive - if only the div block is displayed, if the list returned from the database is greater than 1, but it does not work. Am I abusing the directive? I looked around and did not find solutions that work. Currently, both divs and ng-ifs are displayed are ignored.

<div>
    <div ng-if="listOfThings.length > 1">
        <h1> {{listOfThings.length}} </h1>
        </br>
        <div ng-repeat="thing in listOfThings">
           <label> {{ thing.name }} </label>
        </div>
    </div>
    <div ng-if="listOfThings.length == 1" class="col-sm-4 col-sm-offset-4">
        <h1> {{ listOfThings[0].name }} </h1>
        <iframe width="560" height="315" ng-src="{{ listOfThings[0].embed }}" frameborder="0" allowfullscreen></iframe>
    </div>
</div>

I tried this code that works in Plunker, but for some reason not in my code. Only ng-app works in my code, but ng-if still doesn't work.

    <div ng-app="ngAnimate">
        Click me: <input type="text" ng-model="check" ng-init="check='show'" /><br/>
        Show when check: {{check}}
        <input ng-if="check!='hide'" class="animate-if" placeholder="type the word 'hide'"/>
    </div>

Answer 1

Instead, ng-if="{{listOfThings.length}} > 1"you want:

 ng-if="listOfThings.length>1"

ng-if will evaluate the expression.

-

Answer 2

<div>
    <div ng-if="listOfThings.length > 1">
        <h1> {{listOfThings.length}} </h1>
        </br>
        <div ng-repeat="thing in listOfThings">
           <label> {{ thing.name }} </label>
        </div>
    </div>
    <div ng-if="listOfThings.length == 1" class="col-sm-4 col-sm-offset-4">
        <h1> {{ listOfThings[0].name }} </h1>
        <iframe width="560" height="315" ng-src="{{listOfThings[0].embed}}" frameborder="0" allowfullscreen></iframe>
    </div>
</div>