title: Blaze: Logic (Not, Or, And…) in {{#if}} statement
body: <p>Is there a way to do logic operation in {{#if}} statement?
  I was hoping for something like:</p>
  
  <pre><code>{{#if A &amp;&amp; B}}
    some html
  {{/if}}
  </code></pre>
  
  <p>I couldn’t find documentation about logic in blaze, so I guess it’s not supported. I just wanted to be sure. Sorry for the rather stupid question...</p>