title: How to prevent page from unloading when app is active
body: <p>I have a few tabs in my app. I am currently facing an issue whereby my pages gets unloaded whenever the memory gets low (especially if I bring up the camera in my app). </p>
  
  <p>Is there anyway to mitigate this and prevent unloading from happening? Or is there any way to intercept the unloading process so that something can be done instead of allowing the page to be unloaded?</p>