tsconfig.json

{
  "compilerOptions": {
    "alwaysStrict": true,
    "strict": true,
    "allowSyntheticDefaultImports": true,
    "allowUnreachableCode": false,
    "declaration": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "lib": [
      "dom",
      "es2017"
    ],
    "module": "es2015",
    "moduleResolution": "node",
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "pretty": true,
    "removeComments": false,
    "strictPropertyInitialization": false,
    "target": "es2017",
    "baseUrl": ".",
    "paths": {
      "@ionic/core/hydrate": [
        "./core/hydrate"
      ],
      "@ionic/core": [
        "./core"
      ],
      "@ionic/angular": [
        "./angular"
      ],
      "@ionic/angular-server": [
        "./packages/angular-server"
      ],
      "@ionic/react": [
        "./react"
      ],
      "@ionic/vue": [
        "./vue"
      ]
    }
  }
}