title: navigator.share() is not a function
body: <p>I'm trying to use <code>navigator.canShare()</code> and <code>navigator.share()</code> to experiment with websharing in a react app.</p>
  <p>When I call <code>navigator.canShare()</code> in react, I get the following run time error:</p>
  <pre><code>TypeError: navigator.share is not a function
  </code></pre>
  <p>How can I get react to recognize <code>navigator.canShare()</code>?</p>