title: How to save/load web-app setting in ionic framework after we close it?
body: <p>I have a setting that lists background color options in my app (white and black). When I choose Black, the background changes to black, but after I close the app, it turns back to white, which is the default color.</p>
  
  <p>How do I save the setting and load it when the app is re-opened?</p>