title: How can I clone a JavaScript object except for one key?
body: <p>I have a flat JS object:</p>
  
  <pre><code>{a: 1, b: 2, c: 3, ..., z:26}
  </code></pre>
  
  <p>I want to clone the object except for one element:</p>
  
  <pre><code>{a: 1, c: 3, ..., z:26}
  </code></pre>
  
  <p>What's the easiest way to do this (preferring to use es6/7 if possible)?</p>