diagnostic is undefined about cordova-diagnostic-plugin

[dpa99c]

If the plugin is installed correctly into a Cordova 3.0+ project, the cordova.plugins.diagnostic object is created by the cordova plugin mechanism; you can see this in the plugin's plugin.xml:

<clobbers target="cordova.plugins.diagnostic" />

It can then be referenced as cordova.plugins.diagnostic from the app; see the example project source code

When the plugin is installed via cordova plugin add cordova-diagnostic-plugin, cordova will wrap the contents of the Javascript module to expose the object above. For example, for the Android platform you should end up with the file platforms/android/assets/www/plugins/cordova.plugins.diagnostic/www/android/diagnostic.js

and it should look like:

cordova.define("cordova.plugins.diagnostic.Diagnostic", function(require, exports, module) {
  var Diagnostic = function() {
  };
  ...
  module.exports = new Diagnostic();
});

If cordova.plugins.diagnostic is not defined but window.Diagnostic is, it means the plugin hasn't been installed correctly so the cordova.define wrapper is missing and Diagnostic is being declared as a variable in global scope.

This is not an issue with the plugin, hence closing the issue.