Cannot find namespace 'firebase' when login with firebase

i am usinf ionic 3 latest version and implement firebase login and facing below error

cli packages:

@ionic/cli-utils  : 1.19.0
ionic (Ionic CLI) : 3.19.0

global packages:

cordova (Cordova CLI) : 7.1.0

local packages:

@ionic/app-scripts : 3.1.6
Cordova Platforms  : android 6.0.0
Ionic Framework    : ionic-angular 3.9.2


Android SDK Tools : 25.2.5
Node              : v6.11.0
npm               : 3.10.10
OS                : Windows 10

Environment Variables:



backend : pro

I just started getting this exact same error yesterday. any solution yet by chance?

Same problem here.
I can use yarn to uninstall the firebase module and re-install to make it work on my computer. Then the error happen again when i push to Ionic git to build the app view

I was getting the same errors and removed them by rolling back firebase from version 4.8.1 to 4.6. Try: npm install --save firebase@4.6.2 in CLI. Hope this helps