Ionic-framework: bug: Could not find the implementation for builder @ionic/angular-toolkit:cordova-build

[Ketec]

Bug Report

Ionic version:


[x] *5.0.0

Current behavior:

running "ionic cordova run android" gives that error.
Could not find the implementation for builder @ionic/angular-toolkit:cordova-build

insert the output from ionic info here

Ionic:

Ionic CLI : 5.0.0 (C:\Users\Mauro\AppData\Roaming\nvm\v10.16.0\node_modules\ionic)
Ionic Framework : @ionic/angular 4.4.2
@angular-devkit/build-angular : 0.800.1
@angular-devkit/schematics : 8.0.1
@angular/cli : 8.0.1
@ionic/angular-toolkit : 1.5.1

Cordova:

Cordova CLI : 9.0.0 ([email protected])
Cordova Platforms : android 7.1.4, ios 5.0.1
Cordova Plugins : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 4.0.1, (and 7 other plugins)

Utility:

cordova-res : not installed
native-run : 0.2.1

System:

NodeJS : v10.16.0 (C:\Program Files\nodejs\node.exe)
npm : 6.9.0
OS : Windows 10

[mmmmyers]

Seeing this too after upgrading to Angular 8 and trying to run an ionic cordova build.

Could not find the implementation for builder @ionic/angular-toolkit:cordova-build
at WorkspaceNodeModulesArchitectHost.resolveBuilder
(/node_modules/@angular-devkit/architect/node/node-modules-architect-host.js:49:19)
at RunCommand.runSingleTarget (/node_modules/@angular/cli/models/architect-command.js:176:55)

[TomCosta]

[SOLUTION] It's not permanent, but it helps for a while.
npm remove -g angular-cli

Delete the node_modules folder and the package-lock.json file.

rm -rf node_modules
After that come back the last package.json file configuration.

Install Angular CLI again:

npm install --save-dev @angular/cli@7

Then:

npm install

Run Ionic:

ionic serve

[gustavoborboleta]

I'm having the same problem

[xecheverri]

I have the same problem after upgrading to Angular 8
ng run app:ionic-cordova-build:production --platform=android Could not find the implementation for builder @ionic/angular-toolkit:cordova-build Error: Could not find the implementation for builder @ionic/angular-toolkit:cordova-build at WorkspaceNodeModulesArchitectHost.resolveBuilder (/Users/.../node_modules/@angular/cli/node_modules/@angular-devkit/architect/node/node-modules-architect-host.js:49:19) at RunCommand.runSingleTarget (/Users/.../node_modules/@angular/cli/models/architect-command.js:176:55) at process._tickCallback (internal/process/next_tick.js:68:7) at Function.Module.runMain (internal/modules/cjs/loader.js:832:11) at startup (internal/bootstrap/node.js:283:19) at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3) [ERROR] An error occurred while running subprocess ng.

[UTSOURCE]

I have the same problem after upgrading to Angular 8

[paulstelzer]

Thanks for your issue! This is not related to this repo. The reason: The builder API has changed with Angular 8. A PR for @ionic/angular-toolkit is already available but not published so far (see https://github.com/ionic-team/angular-toolkit/pull/132 )

At the moment Angular 8 is not supported.

If you cannot wait (like me ;)), just replace @ionic/angular-toolkit inside angular.json with paulstelzer-ionic-angular-toolkit and run npm i paulstelzer-ionic-angular-toolkit. This is the build of the mentioned branch. After @ionic/angular-toolkit got the new release you can use this again

[AkyBreez]

Thanks for your issue! This is not related to this repo. The reason: The builder API has changed with Angular 8. A PR for @ionic/angular-toolkit is already available but not published so far (see ionic-team/angular-toolkit#132 )

At the moment Angular 8 is not supported.

If you cannot wait (like me ;)), just replace @ionic/angular-toolkit inside angular.json with paulstelzer-ionic-angular-toolkit and run npm i paulstelzer-ionic-angular-toolkit. This is the build of the mentioned branch. After @ionic/angular-toolkit got the new release you can use this again

Saved me on this one ;)

[Ketec]

Not sure whos maintaining toolkit - but it seems there is no progress on this breaking issue.
The pull request seems to have gone stagnant.

[waperp]

Gracias por tu problema! Esto no está relacionado con este repositorio. El motivo: la API del constructor ha cambiado con Angular 8. @ionic/angular-toolkitYa se encuentra disponible un PR para la obra, pero no se ha publicado hasta ahora (consulte ionic-team / angular-toolkit # 132 )

Por el momento no se soporta Angular 8.

Si no puedes esperar (como yo;)), simplemente reemplaza @ionic/angular-toolkitdentro de angular.json paulstelzer-ionic-angular-toolkity ejecuta npm i paulstelzer-ionic-angular-toolkit. Esta es la compilación de la rama mencionada. Después de @ionic/angular-toolkit obtener el nuevo lanzamiento puedes usar esto de nuevo.

Not working

[jugbeep]

Still experiencing this. @paulstelzer, I can't seem to get your quick fix to work. I followed your steps and got a new error:

architect_1.createBuilder is not a function
TypeError: architect_1.createBuilder is not a function
    at Object.<anonymous> (../node_modules/paulstelzer-ionic-angular-toolkit/builders/cordova-build/index.js:17:31)
    at Module._compile (internal/modules/cjs/loader.js:701:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:712:10)
    at Module.load (internal/modules/cjs/loader.js:600:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:539:12)
    at Function.Module._load (internal/modules/cjs/loader.js:531:3)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:22:18)
    at Promise.resolve.then (../node_modules/@angular/cli/node_modules/@angular-devkit/architect/node/node-modules-architect-host.js:79:61)
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:757:11)
    at startup (internal/bootstrap/node.js:283:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
[ERROR] An error occurred while running subprocess ng.

[morrisonbrett]

Thanks for your issue! This is not related to this repo. The reason: The builder API has changed with Angular 8. A PR for @ionic/angular-toolkit is already available but not published so far (see ionic-team/angular-toolkit#132 )

At the moment Angular 8 is not supported.

If you cannot wait (like me ;)), just replace @ionic/angular-toolkit inside angular.json with paulstelzer-ionic-angular-toolkit and run npm i paulstelzer-ionic-angular-toolkit. This is the build of the mentioned branch. After @ionic/angular-toolkit got the new release you can use this again

Thanks @paulstelzer for addressing this. Your fix worked for me.

[Crypt0Graphic]

Still experiencing this. @paulstelzer, I can't seem to get your quick fix to work. I followed your steps and got a new error:

architect_1.createBuilder is not a function
TypeError: architect_1.createBuilder is not a function
    at Object.<anonymous> (../node_modules/paulstelzer-ionic-angular-toolkit/builders/cordova-build/index.js:17:31)
    at Module._compile (internal/modules/cjs/loader.js:701:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:712:10)
    at Module.load (internal/modules/cjs/loader.js:600:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:539:12)
    at Function.Module._load (internal/modules/cjs/loader.js:531:3)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:22:18)
    at Promise.resolve.then (../node_modules/@angular/cli/node_modules/@angular-devkit/architect/node/node-modules-architect-host.js:79:61)
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:757:11)
    at startup (internal/bootstrap/node.js:283:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
[ERROR] An error occurred while running subprocess ng.

Did you make replacament in angular.json or in package.json?

[paulstelzer]

As I wrote above: just replace @ionic/angular-toolkit inside angular.json with paulstelzer-ionic-angular-toolkit and run npm i paulstelzer-ionic-angular-toolkit.

[SebaPaciorek]

Hey @paulstelzer. I replaced as you wrote.
This is my angular.json:
`
{
"$schema": "./node_modules/@angular-devkit/core/src/workspace/workspace-schema.json",
"version": 1,
"defaultProject": "app",
"newProjectRoot": "projects",
"projects": {
"app": {
"root": "",
"sourceRoot": "src",
"projectType": "application",
"prefix": "app",
"schematics": {},
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "www",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.app.json",
"assets": [
{
"glob": "/",
"input": "src/assets",
"output": "assets"
},
{
"glob": "/.svg",
"input": "node_modules/ionicons/dist/ionicons/svg",
"output": "./svg"
}
],
"styles": [
{
"input": "src/theme/variables.scss"
},
{
"input": "src/global.scss"
}
],
"scripts": [],
"es5BrowserSupport": true
},
"configurations": {
"production": {
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
],
"optimization": true,
"outputHashing": "all",
"sourceMap": false,
"extractCss": true,
"namedChunks": false,
"aot": true,
"extractLicenses": true,
"vendorChunk": false,
"buildOptimizer": true,
"budgets": [
{
"type": "initial",
"maximumWarning": "2mb",
"maximumError": "5mb"
}
]
},
"ci": {
"progress": false
}
}
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"options": {
"browserTarget": "app:build"
},
"configurations": {
"production": {
"browserTarget": "app:build:production"
},
"ci": {
"progress": false
}
}
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "app:build"
}
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.spec.json",
"karmaConfig": "src/karma.conf.js",
"styles": [],
"scripts": [],
"assets": [
{
"glob": "favicon.ico",
"input": "src/",
"output": "/"
},
{
"glob": "/",
"input": "src/assets",
"output": "/assets"
}
]
},
"configurations": {
"ci": {
"progress": false,
"watch": false
}
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": ["src/tsconfig.app.json", "src/tsconfig.spec.json"],
"exclude": ["/node_modules/"]
}
},
"ionic-cordova-build": {
"builder": "paulstelzer-ionic-angular-toolkit:cordova-build",
"options": {
"browserTarget": "app:build"
},
"configurations": {
"production": {
"browserTarget": "app:build:production"
}
}
},
"ionic-cordova-serve": {
"builder": "paulstelzer-ionic-angular-toolkit:cordova-serve",
"options": {
"cordovaBuildTarget": "app:ionic-cordova-build",
"devServerTarget": "app:serve"
},
"configurations": {
"production": {
"cordovaBuildTarget": "app:ionic-cordova-build:production",
"devServerTarget": "app:serve:production"
}
}
}
}
},
"app-e2e": {
"root": "e2e/",
"projectType": "application",
"architect": {
"e2e": {
"builder": "@angular-devkit/build-angular:protractor",
"options": {
"protractorConfig": "e2e/protractor.conf.js",
"devServerTarget": "app:serve"
},
"configurations": {
"ci": {
"devServerTarget": "app:serve:ci"
}
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": "e2e/tsconfig.e2e.json",
"exclude": ["/node_modules/*"]
}
}
}
}
},
"cli": {
"defaultCollection": "paulstelzer-ionic-angular-toolkit"
},
"schematics": {
"paulstelzer-ionic-angular-toolkit:component": {
"styleext": "scss"
},
"paulstelzer-ionic-angular-toolkit:page": {
"styleext": "scss"
}
}
}

then I run npm i paulstelzer-ionic-angular-toolkit Error after ionic cordova run android

ng.cmd run app:ionic-cordova-build --platform=android
architect_1.createBuilder is not a function
TypeError: architect_1.createBuilder is not a function
at Object. (D:\Ionic\PROJECTS\Tours\node_modulespaulstelzer-ionic-angular-toolkit\builders\cordova-build\index.js:17:31)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:22:18)
at Promise.resolve.then (D:\Ionic\PROJECTS\Tours\node_modules@angular\cli\node_modules@angular-devkit\architect\node\node-modules-architect-host.js:80:61)
at process._tickCallback (internal/process/next_tick.js:68:7)
at Function.Module.runMain (internal/modules/cjs/loader.js:745:11)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:743:3)
[ERROR] An error occurred while running subprocess ng.

ng.cmd run app:ionic-cordova-build --platform=android exited with exit code 1.

Re-running this command with the --verbose flag may provide more information.`

ionic serve works well, but I need to build to android.

EDIT:
It works. Additionally must change to this:
"@angular-devkit/architect": "0.800.0",

[paulstelzer]

You have to use 0.800.0 or newer of @angular-devkit

[redplane]

Any official annoucement about this please ?

[paulstelzer]

It's on the way :)

• https://github.com/ionic-team/ionic/pull/18577
• https://github.com/ionic-team/angular-toolkit/pull/132

[redplane]

@paulstelzer , I installed the plugin you mentioned paulstelzer-ionic-angular-toolkit, but I received an error: Could not find module "@ionic/angular-toolkit".

Any solutions please ?

I'm using ionic 4 and angular 8

[heikomat]

@paulstelzer , I installed the plugin you mentioned paulstelzer-ionic-angular-toolkit, but I received an error: _Could not find module "@ionic/angular-toolkit"_.

Any solutions please ?

I'm using ionic 4 and angular 8

As @paulstelzer said, installing the package isn't enough, you need to also use it in the angular.json instead of @ionic/angular-toolkit

[redplane]

@heikomat , thank you, after having read the comment, I made it worked 👍

[mhartington]

Hey folks! Angular-toolkit 2.0 has been released, please move off of the unofficial version.

[paulstelzer]

Correct, please REMOVE my package and use the official one again

[Lertis]

My package.json

"dependencies": {
"@angular/animations": "^8.0.2",
"@angular/cdk": "~8.0.1",
"@angular/common": "^8.0.2",
"@angular/core": "^8.0.2",
"@angular/forms": "^8.0.2",
"@angular/http": "^7.2.15",
"@angular/material": "^8.0.1",
"@angular/platform-browser": "^8.0.2",
"@angular/platform-browser-dynamic": "^8.0.2",
"@angular/router": "^8.0.2",
"@ionic-native/core": "^5.0.0",
"@ionic-native/splash-screen": "^5.0.0",
"@ionic-native/status-bar": "^5.0.0",
"@ionic/angular": "^4.1.0",
"cordova-android": "^8.0.0",
"core-js": "^2.5.4",
"hammerjs": "^2.0.8",
"paulstelzer-ionic-angular-toolkit": "^2.0.0",
"rxjs": "~6.5.1",
"tslib": "^1.9.0",
"zone.js": "^0.9.1"
},
"devDependencies": {
"@angular-devkit/architect": "0.801.0",
"@angular-devkit/build-angular": "~0.800.4",
"@angular-devkit/core": "~7.3.8",
"@angular-devkit/schematics": "~7.3.8",
"@angular/cli": "~8.0.4",
"@angular/compiler": "~8.0.2",
"@angular/compiler-cli": "~8.0.2",
"@angular/language-service": "~8.0.2",
"@ionic/angular-toolkit": "~1.5.1",
"@ionic/lab": "2.0.4",
"@types/jasmine": "~2.8.8",
"@types/jasminewd2": "~2.0.3",
"@types/node": "~12.0.0",
"codelyzer": "~4.5.0",
"cordova-plugin-device": "^2.0.2",
"cordova-plugin-ionic-keyboard": "^2.1.3",
"cordova-plugin-ionic-webview": "^4.1.1",
"cordova-plugin-splashscreen": "^5.0.2",
"cordova-plugin-statusbar": "^2.4.2",
"cordova-plugin-whitelist": "^1.3.3",
"jasmine-core": "~2.99.1",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~4.1.0",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "~2.0.1",
"karma-jasmine": "~1.1.2",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.4.0",
"ts-node": "~8.3.0",
"tslint": "~5.17.0",
"typescript": "~3.4.5"
}

ionic info

Ionic:

Ionic CLI : 5.2.1 (C:\Users\Medved-PC\AppData\Roaming\npm\node_modules\ionic)
Ionic Framework : @ionic/angular 4.6.0
@angular-devkit/build-angular : 0.800.6
@angular-devkit/schematics : 7.3.9
@angular/cli : 8.0.6
@ionic/angular-toolkit : 1.5.1

Cordova:

Cordova CLI : 9.0.3 ([email protected])
Cordova Platforms : android 8.0.0
Cordova Plugins : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 4.1.1, (and 4 other plugins)

Utility:

cordova-res : 0.5.1
native-run : 0.2.2

System:

Android SDK Tools : 26.1.1 (C:\Users\Medved-PC\AppData\Local\Android\Sdk)
NodeJS : v10.16.0 (C:\Program Files\nodejs\node.exe)
npm : 6.10.0
OS : Windows 10

ng v

Angular CLI: 8.0.6
Node: 10.16.0
OS: win32 x64
Angular: 8.1.0
... animations, common, core, forms, platform-browser
... platform-browser-dynamic, router

Package Version

@angular-devkit/architect 0.801.0
@angular-devkit/build-angular 0.800.6
@angular-devkit/build-optimizer 0.800.6
@angular-devkit/build-webpack 0.800.6
@angular-devkit/core 7.3.9
@angular-devkit/schematics 7.3.9
@angular/cdk 8.0.2
@angular/cli 8.0.6
@angular/compiler 8.0.3
@angular/compiler-cli 8.0.3
@angular/http 7.2.15
@angular/language-service 8.0.3
@angular/material 8.0.2
@ngtools/webpack 8.0.6
@schematics/angular 8.0.6
@schematics/update 0.800.6
rxjs 6.5.2
typescript 3.4.5
webpack 4.30.0

Replace @ionic/angular-toolkit to paulstelzer-ionic-angular-toolkit in the angular.json.

For example

ionic cordova build android

successfully completed.

[patrickbussmann]

I don't know why but I have the same issue with recommended @ionic/angular-toolkit version 2.

$ npm "install" "-g" "cordova@latest"
$ npm "install" "-g" "ionic@latest"

cordova version: 9.0.0
ionic version: 5.2.3

$ ionic "cordova" "build" "--release" "--device" "ios" "--buildConfig" "/var/folders/6q/wgy6jtp12w5gzgm9lzcglpqw0000gn/T/__bitrise-cordova-build-config__380555088/build.json" "--" "--buildFlag=-UseModernBuildSystem=0"
> cordova platform add ios --save
Using cordova-fetch for cordova-ios@^5.0.0
Adding ios project...
Creating Cordova project for the iOS platform:
    Path: platforms/ios
    Package: org.example
    Name: Example
iOS project created with [email protected]
Plugin 'cordova-plugin-whitelist' found in config.xml... Migrating it to package.json
Plugin 'cordova-plugin-statusbar' found in config.xml... Migrating it to package.json
Plugin 'cordova-plugin-device' found in config.xml... Migrating it to package.json
Plugin 'cordova-plugin-splashscreen' found in config.xml... Migrating it to package.json
Plugin 'cordova-plugin-ionic-webview' found in config.xml... Migrating it to package.json
Plugin 'cordova-plugin-mauron85-background-geolocation' found in config.xml... Migrating it to package.json
Plugin 'ionic-plugin-deeplinks' found in config.xml... Migrating it to package.json
Plugin 'cordova-plugin-geolocation' found in config.xml... Migrating it to package.json
Plugin 'cordova-plugin-telerik-imagepicker' found in config.xml... Migrating it to package.json
Plugin 'onesignal-cordova-plugin' found in config.xml... Migrating it to package.json
Plugin 'cordova-plugin-camera' found in config.xml... Migrating it to package.json
Plugin 'cordova-plugin-facebook4' found in config.xml... Migrating it to package.json
Discovered saved plugin "cordova-plugin-file". Adding it to the project
Installing "cordova-plugin-file" for ios
Adding cordova-plugin-file to package.json
Discovered saved plugin "cordova-plugin-ionic-keyboard". Adding it to the project
Installing "cordova-plugin-ionic-keyboard" for ios
Adding cordova-plugin-ionic-keyboard to package.json
Discovered saved plugin "cordova-plugin-whitelist". Adding it to the project
Installing "cordova-plugin-whitelist" for ios
Adding cordova-plugin-whitelist to package.json
Discovered saved plugin "cordova-plugin-statusbar". Adding it to the project
Installing "cordova-plugin-statusbar" for ios
Adding cordova-plugin-statusbar to package.json
Discovered saved plugin "cordova-plugin-device". Adding it to the project
Installing "cordova-plugin-device" for ios
Adding cordova-plugin-device to package.json
Discovered saved plugin "cordova-plugin-splashscreen". Adding it to the project
Installing "cordova-plugin-splashscreen" for ios
Adding cordova-plugin-splashscreen to package.json
Discovered saved plugin "cordova-plugin-ionic-webview". Adding it to the project
Installing "cordova-plugin-ionic-webview" for ios
Adding cordova-plugin-ionic-webview to package.json
Discovered saved plugin "cordova-plugin-mauron85-background-geolocation". Adding it to the project
Installing "cordova-plugin-mauron85-background-geolocation" for ios
Adding cordova-plugin-mauron85-background-geolocation to package.json
Discovered saved plugin "ionic-plugin-deeplinks". Adding it to the project
Installing "ionic-plugin-deeplinks" for ios
Adding ionic-plugin-deeplinks to package.json
Discovered saved plugin "cordova-plugin-geolocation". Adding it to the project
Installing "cordova-plugin-geolocation" for ios
Adding cordova-plugin-geolocation to package.json
Discovered saved plugin "cordova-plugin-telerik-imagepicker". Adding it to the project
Installing "cordova-plugin-telerik-imagepicker" for ios
Adding cordova-plugin-telerik-imagepicker to package.json
Discovered saved plugin "onesignal-cordova-plugin". Adding it to the project
Installing "onesignal-cordova-plugin" for ios
"framework" tag with type "podspec" is deprecated and will be removed. Please use the "podspec" tag.
Running command: pod install --verbose
     Cloning into '/var/folders/6q/wgy6jtp12w5gzgm9lzcglpqw0000gn/T/d20190801-2536-mt1bq'...
     Note: checking out '9271672bd77326df1063393451948b456ed9cbea'.

     You are in 'detached HEAD' state. You can look around, make experimental
     changes and commit them, and you can discard any commits you make in this
     state without impacting any branches by performing another checkout.

     If you want to create a new branch to retain commits you create, you may
     do so (now or later) by using -b with the checkout command again. Example:

       git checkout -b <new-branch-name>

Adding onesignal-cordova-plugin to package.json
Discovered saved plugin "cordova-plugin-camera". Adding it to the project
Installing "cordova-plugin-camera" for ios
Adding cordova-plugin-camera to package.json
Discovered saved plugin "cordova-plugin-facebook4". Adding it to the project
Installing "cordova-plugin-facebook4" for ios
Adding cordova-plugin-facebook4 to package.json
> ng run app:ionic-cordova-build --platform=ios
An unhandled exception occurred: Could not find the implementation for builder @ionic/ng-toolkit:cordova-build
See "/private/var/folders/6q/wgy6jtp12w5gzgm9lzcglpqw0000gn/T/ng-9GGUs2/angular-errors.log" for further details.
[ERROR] An error occurred while running subprocess ng.

        ng run app:ionic-cordova-build --platform=ios exited with exit code 127.

        Re-running this command with the --verbose flag may provide more information.
command failed, error: exit status 127

An unhandled exception occurred: Could not find the implementation for builder @ionic/ng-toolkit:cordova-build

cordova version: 9.0.0
ionic version: 5.2.3

"@ionic/angular-toolkit": "^2.0.0"

[patrickbussmann]

Small information:
I found the solution here: https://github.com/ionic-team/ionic-cli/issues/3763#issuecomment-442177064

In angular.json change:
@ionic/ng-toolkit to @ionic/angular-toolkit
@ionic/schematics-angular to @ionic/angular-toolkit

Thanks @carstenbaumhoegger and @abennouna for this important information which is missing in some docs. 🥳

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