How to do a 'null' check in 'if' condition action of Azure Logic App
<p>I've created a logic app which contains some trigger, an 'http' connector and then an 'If' condition activity. The 'http' connector returns a 'json' result say <code>jsonObj</code>.</p>

<p>I'm able to check condition as <code>@equal(body('HTTP')['jsonObj'].someProperty,'someValue')</code> but not able to do a <code>null</code> check on that <code>someProperty</code> value. </p>

<p>Below are some ways I tried which are not working.</p>

<pre><code>@equal(body('HTTP')['jsonObj'].someProperty, null) --Unable to save
@equal(body('HTTP')['jsonObj']?.someProperty,'null') --Comparing with string value 'null'
</code></pre>