bug: Ionic 4 back button restart app (DOM) when you are in root [Cordova/App]

Bug Report

Ionic version:

[x] 4.6.2 | 4.1

Current behavior:

the android back button reboots doom when it is in the last component

Gif Expected behavior: Close app

Steps to reproduce:

• Run ionic start “new project”
• Choose tab app
• run in android platform

example image

Other information:

I noticed the error when I was developing my app and I stopped at the root page and press the button back. Apart from this, it is not detecting the backbutton subscribe Ionic info:

Ionic:

   Ionic CLI                     : 5.0.1 (/usr/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 4.6.2
   @angular-devkit/build-angular : 0.13.9
   @angular-devkit/schematics    : 7.3.9
   @angular/cli                  : 7.3.9
   @ionic/angular-toolkit        : 1.5.1

Cordova:

   Cordova CLI       : 9.0.0 (cordova-lib@9.0.1)
   Cordova Platforms : android 8.0.0
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 4.0.1, (and 24 other plugins)

Utility:

   cordova-res : not installed
   native-run  : 0.2.7

System:

   Android SDK Tools : 26.1.1 (/home/juan/Android/Sdk)
   NodeJS            : v11.15.0 (/usr/bin/node)
   npm               : 6.10.0
   OS                : Linux 4.19

[tntwist]

Hi @SidiBecker,

here is a little guide for you:

1. clone the ionic repo/your forked repo

• open your favorite command line application
• run git clone https://github.com/ionic-team/ionic or git clone url-to-your-fork and change the directory to the cloned repo (cd ionic)
• make sure to checkout the tagged commit for the current released version with git checkout v4.6.2

1. install node modules

• run npm install in the base directory of the cloned repo
• change the directory to the core directory and run npm install again

1. make the appropriate changes to the app.tsx file located under core/src/components/app (see https://github.com/ionic-team/ionic/pull/18794/files, the ionic devs already merged the pr and did some cleanings)
2. build the core pagacke of ionic

• make sure you are in the core directory of the ionic repo with your command line application
• run npm run-script build
• wait for build to complete. a dist folder should be created inside the core folder of the repo.

1. copy the dist folder to the node_modules folder of your app project

• locate the node_modules folder in the project directory of your app and open it. delete the dist folder inside @ionic/core.
• copy the dist folder created by the build script in step 4 to the @ionic/core folder inside the node_modules of your app

1. Finish 😃. With the next build of your app the hardware back button should work again.

Caution: Modifying your node_modules is a pretty dirty way and could result in other bugs/unexpected behaviors. I recommend you wait for the next offical release and just update your package.json reference of ionic.

[TejasBhitle]

Thank you so much @tntwist