title: Specifing width of a flexbox flex item: width or basis?
body: <p>Say I'm doing 3 flex columns, first one 50%, the other two auto adjust.</p>
  
  <pre><code>.half {
      flex: 0 0 auto ;
      width: 50% ;
  }
  </code></pre>
  
  <p>or</p>
  
  <pre><code>.half {
      flex: 0 0 50%;
  }
  </code></pre>
  
  <p>These seem to be functionally the same.  Are they?</p>