bug: ion-back-button ignores global config for backButtonText

[vadimwe]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Ionic Framework Version

• v4.x
• v5.x
• v6.x

Current Behavior

ion-back-button ignores global config:

IonicModule.forRoot({ backButtonText: '', }),

Expected Behavior

back button contains only icon

Steps to Reproduce

Update to "@ionic/angular": "^5.8.3" with "@angular/*": "~12.2.9"

Code Reproduction URL

No response

Ionic Info

Ionic:

Ionic CLI : 6.17.1 (/usr/local/lib/node_modules/@ionic/cli)
Ionic Framework : @ionic/angular 5.8.3
@angular-devkit/build-angular : 12.2.9
@angular-devkit/schematics : 12.0.3
@angular/cli : 12.2.9
@ionic/angular-toolkit : 4.0.0

Cordova:

Cordova CLI : 10.0.0
Cordova Platforms : android 10.1.0, ios 6.2.0
Cordova Plugins : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 5.0.0, (and 16 other plugins)

Utility:

cordova-res : 0.15.3
native-run : 1.4.1

System:

Android SDK Tools : 26.1.1 (/Users/vs/Library/Android/sdk)
ios-deploy : 1.11.4
ios-sim : 8.0.2
NodeJS : v12.18.3 (/usr/local/bin/node)
npm : 6.14.6
OS : macOS Big Sur
Xcode : Xcode 13.0 Build version 13A233

Additional Information

No response

[site-chenwei]

I also encountered this problem

[vadimwe]

Quick fix if you need.

variables.scss or another global file:
ion-back-button { &::part(text) { display: none; } }

[EinfachHans]

I debugged a bit. Looks like this commit causes this.

config.reset(configObj); in the initialize is first called with:

_zoneGate: function(),
backButtonText: "",
persistConfig: false

and then called again (from defineCustomElements.globalScripts) with:

m: Map {"persistConfig" => false, "backButtonText" => "", "_zoneGate" => function, "mode" => "ios"} ,
persistConfig: false

[liamdebeasi]

Thanks for the issue. This has been resolved via #24054, and a fix will be available in an upcoming release of Ionic Framework.

[liamdebeasi]

This is fixed in Ionic Angular v5.8.4. Thanks for the report!

npm install @ionic/angular@latest