title: What is the correct use of the || in javascript
body: <p>In the code below, because  s  is null d = "test"
  but if s = "hello" then d would = "hello".</p>
  
  <p>Is this correct as it works? what is the correct way to use ||</p>
  
  <pre><code>var s = null;
  
  var d = s || "test";
  
  alert(d);
  </code></pre>