npm install angularfire2 firebase promise-polyfill --save
npm i rxjs@6 rxjs-compat@6 promise-polyfill --save
npm install -g typescript@latest
- TypeError: Object(…) is not a function:
https://stackoverflow.com/questions/50348643/typeerror-object-is-not-a-function#answer-51068637 - Cannot set property 'bindCallback' of undefined:
https://stackoverflow.com/questions/53903220/how-to-fix-cannot-set-property-bindcallback-of-undefined-in-ionic#answer-53946990