When using an ng-show directive on an element, I noticed that the UnderscoreJS helper function _.isNull behaves differently than the standard === operator.
For example, when checking if newJobWorkPercentage is null:
<div class="form-group" ng-show="newJobWorkPercentage === null">
... some content
</div>
The above code will display the content if newJobWorkPercentage is null, but this code won't:
<div class="form-group" ng-show="_.isNull(newJobWorkPercentage)">
... some content
</div>
In my app, I just stick to using === for comparisons, but I find it interesting that the helper doesn't work as expected.