title: How to reset this JS object?
body: <p>Here I want to reset all properties of Data to their original values, how I do that?</p>
  
  <pre><code>var Data = {
    prop1: false,
    prop2: true,
    prop3: null
  }
  
  Some code executes &amp; sets Data.prop1 = "abc";
  </code></pre>
  
  <p>I never instantiated Data, is that a problem?</p>