cordova-plugin-ionic/tsconfig.ng.json

{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "module": "es2015",
    "outDir": "dist/ngx",
    "rootDir": "www"
  },
  "include": ["www/ngx/index.ts"],
  "angularCompilerOptions": {
    "enableIvy": false
  }
}