I've developed an app and now need to add barcode scanning. What is the process for adding the cordova barcode scanner plugin(s) to my JQuery mobile app?

I've been looking in the Appery.io documentation, stackoverflow, and books. Now I'll try this. All I want to do is use javascript to dynamically change a button component from the swatchA to swatchB color. It seems like this should be a simple Appery call, but what is it?

Btw, I did clear the Chrome browser cache as suggested.

I want to put my back button at the bottom of my page and give it its own "look". I may come to the page from several prior pages, so I need to save the route back to the prior page. How should I do this? Thanks in advance.