title: how m.facebook.com is able to run native mobile actions like camera and gallery ?
body: <p>when I visit <a href="https://m.facebook.com/" rel="nofollow">https://m.facebook.com/</a> I can  upload a picture from gallery , or take picture from camera. </p>
  
  <p>How it is possible that a website is able to run native actions ? </p>