title: OR statement being ignored
body: <p>I'm trying to fire my masterFunction only if certain keys are pressed. However it's being called regardless of what button is clicked. Even though the console log shows a different key.</p>
  <p>Can anyone advise?</p>
  <pre><code>//Update display on keydown event
  addEventListener('keydown', (e) =&gt; {
      pressedKey = event.key;
      console.log(pressedKey);
      keyDownOperatorMapping(e);
  });
  
  let keyDownOperatorMapping = (e) =&gt; {
  if (pressedKey === &quot;+&quot; || &quot;-&quot; || &quot;*&quot; || &quot;Enter&quot; || &quot;Backspace&quot; || &quot;.&quot; || &quot;/&quot;) {
  masterFunction(e);
  } 
  };
  </code></pre>
  <p>Example: <a href="https://jsfiddle.net/rykawgs9/" rel="nofollow noreferrer">https://jsfiddle.net/rykawgs9/</a></p>