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HTML 

              
                <html>
  <head>
    <title>Share example</title>
  </head>
  <body>
    <h1>This is a share example</h1>
    <aside id="share"></aside>
    <P>If your browser supports the web share API, then there's a nice button here for you to try pressing.</p>
   <script>
  // Add a share button if the browser supports it. Your website also has to be HTTPS for this to appear.
  if (navigator.canShare && document.getElementById("share")) {
    shareicon='<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#5f6368"><path d="M680-80q-50 0-85-35t-35-85q0-6 3-28L282-392q-16 15-37 23.5t-45 8.5q-50 0-85-35t-35-85q0-50 35-85t85-35q24 0 45 8.5t37 23.5l281-164q-2-7-2.5-13.5T560-760q0-50 35-85t85-35q50 0 85 35t35 85q0 50-35 85t-85 35q-24 0-45-8.5T598-672L317-508q2 7 2.5 13.5t.5 14.5q0 8-.5 14.5T317-452l281 164q16-15 37-23.5t45-8.5q50 0 85 35t35 85q0 50-35 85t-85 35Zm0-80q17 0 28.5-11.5T720-200q0-17-11.5-28.5T680-240q-17 0-28.5 11.5T640-200q0 17 11.5 28.5T680-160ZM200-440q17 0 28.5-11.5T240-480q0-17-11.5-28.5T200-520q-17 0-28.5 11.5T160-480q0 17 11.5 28.5T200-440Zm480-280q17 0 28.5-11.5T720-760q0-17-11.5-28.5T680-800q-17 0-28.5 11.5T640-760q0 17 11.5 28.5T680-720Zm0 520ZM200-480Zm480-280Z"/></svg>';
    iosshareicon='<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#5f6368"><path d="M240-40q-33 0-56.5-23.5T160-120v-440q0-33 23.5-56.5T240-640h120v80H240v440h480v-440H600v-80h120q33 0 56.5 23.5T800-560v440q0 33-23.5 56.5T720-40H240Zm200-280v-447l-64 64-56-57 160-160 160 160-56 57-64-64v447h-80Z"/></svg>';
  
  if (/iPad|iPhone|iPod/.test(navigator.platform)) {shareicon=iosshareicon;}
  if (navigator.platform === 'MacIntel') {shareicon=iosshareicon;}
    document.getElementById("share").style.display="block";
    document.getElementById("share").innerHTML=shareicon;
  }
   document.getElementById("share").addEventListener('click', event => {
     navigator.share({
      title: 'Code for a share button',
      url: 'https://codepen.io/jamescridland/pen/RNbZOdG'
      }).catch(console.error);
    });
  
  </script>
  </body>
</html>
!

CSS 

              
                #share {cursor:pointer;display:none;}
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JS
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999px

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