Tabpage "tabs" not highlighting when selected

I can give some tips for avoiding them.

• always declare types of return values of all functions
• any time you call any function that returns a future (Promise/Observable), make sure one of two things is true: either the calling function returns void and everything that needs the resolved value is self-contained inside a then or subscribe in that function; or the very first word of your calling function is return
• any time you are interacting with cordova, wrap with platform.ready().then()
• ditto with Storage and its ready()
• never use setTimeout()
• if you use any libraries with callback systems, Promise-ify them and only use that interface
• let Angular control the DOM. don't bring in anything (like jQuery) that is going to fight with it