Ionic 5 w/ Capacitor 'plugin_not_installed'

Issue

Ionic 5 with Capacitor getting 'plugin_not_installed' with plugin 'cordova.plugins.diagnostic'. Tried installing with this doc.

I have:

• config.xml has <plugin name="cordova.plugins.diagnostic" spec="^5.30.0" />.
• package.json has

"cordova": {
    "plugins": {
      ...
      "cordova.plugins.diagnostic": {}
      ...
    }
 }

and

"dependencies": {
    ...
    "@ionic-native/diagnostic": "^5.30.0",
    ...
    "cordova.plugins.diagnostic": "^6.0.2",
    ...
}

Here's my output for cordova plugin list

com.googlemaps.ios 3.9.0 "Google Maps SDK for iOS"
cordova-plugin-add-swift-support 2.0.2 "AddSwiftSupport"
cordova-plugin-device 2.0.2 "Device"
cordova-plugin-geolocation 4.1.0 "Geolocation"
cordova-plugin-googlemaps 2.7.1 "cordova-plugin-googlemaps"
cordova-plugin-ionic-keyboard 2.2.0 "cordova-plugin-ionic-keyboard"
cordova-plugin-ionic-webview 4.2.1 "cordova-plugin-ionic-webview"
cordova-plugin-nativegeocoder 3.4.1 "NativeGeocoder"
cordova-plugin-splashscreen 5.0.2 "Splashscreen"
cordova-plugin-statusbar 2.4.2 "StatusBar"
cordova-plugin-whitelist 1.3.3 "Whitelist"
cordova.plugins.diagnostic 6.0.2 "Diagnostic"

And have tried these commands:

ionic capacitor sync ios
cordova build
ionic build
ionic cordova run ios -l

Solution

First, when using Cordova plugin inside a capacitor project, use this commands.

npm install cordova.plugins.diagnostic @ionic-native/diagnostic

Refer docs for details

Secondly, remove your platform and ios folders that have been already created. Then, for Capacitor follow these commands.

ionic capacitor add ios
ionic build
ionic capacitor sync ios
ionic capacitor open ios

For any subsequent changes to your code, you just have to run

ionic build && ionic capacitor sync ios (if you have added any new package/plugin)

ionic build && ionic capacitor copy ios (if only code has been changed)

You say your project is built on capacitor, then you don't have to run ionic cordova run ios command, or any cordova commands

Refer this command docs

Answered By - Chetan Bansal