Angular2 and Firebase App unable to Compile due to TypeScript Issue

Latest Update:

The recent issue causing the app to crash upon launch has been successfully resolved. Interestingly, it was not due to TypeScript compilation errors. In the Git repository's main.ts file, all that was needed was a simple line change:

platformBrowserDynamic().bootstrapModule(AppModule);

With this fix in place, the app now launches smoothly without any errors.

However, there is still an ongoing problem with the TypeScript compilation process, resulting in the following error messages:

node_modules/firebase/firebase.d.ts(391,3): error TS2300: Duplicate identifier 'export='.
typings/globals/firebase/index.d.ts(323,2): error TS2300: Duplicate identifier 'export='.

The contents of my tsconfig.json file are as follows:

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false,
    "typeRoots": [ "../node_modules/@types" ],
    "listFiles": true
  },
  "files": [ "typings/index.d.ts" ],
  "include": [ "app/**/*" ]
}

The Angular application I am working on utilizes Firebase (AngularFire2) for authentication and database functionalities.

Initially, everything ran smoothly using AngularFire2 alone. However, I encountered the need to incorporate Firebase's ServerValue.TIMESTAMP, which involved importing Firebase alongside AngularFire2.

After consulting various resources online, including answers on Stack Overflow, I believe I have correctly integrated Firebase into my project.

This required adding

"files": [ "typings/index.d.ts" ]
to my tsconfig.json file:

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false,
    "typeRoots": [ "../node_modules/@types" ],
    "listFiles": true
  },
  "include": [ "../app/**/*.ts" ],
  "exclude": [ "../node_modules" ],
  "files": [ "typings/index.d.ts" ]
}

I also made adjustments in my systems.config.js file according to guidance from a related question here.

While this rectified numerous duplication errors flagged by the TypeScript compiler, a new issue emerged causing the app to crash at startup with a vague error message:

[Error] Error: 

[...] // The error details go here

Additionally, there seems to be a problem with the compilation of TypeScript files within the app directory, as evidenced by the following terminal output:

[0] /Users/jonathonoates/Sites/my-app/node_modules/typescript/lib/lib.d.ts
[0] /Users/jonathonoates/Sites/my-app/typings/globals/core-js/index.d.ts
[0] /Users/jonathonoates/Sites/my-app/typings/globals/firebase/index.d.ts
[0] /Users/jonathonoates/Sites/my-app/typings/globals/jasmine/index.d.ts
[0] /Users/jonathonoates/Sites/my-app/typings/globals/node/index.d.ts
[0] /Users/jonathonoates/Sites/my-app/typings/index.d.ts

To further investigate, a dedicated branch in my GitHub repository is available for review.

If you are familiar with these challenges, your assistance would be greatly appreciated!

Answer №1

After implementing the latest update, the cryptic error has now been resolved.

However, I encountered a persistent issue with

error TS2300: Duplicate identifier
.

To resolve this, I removed the Firebase global typings, resulting in adjustments to my typings.json file:

{
  "globalDependencies": {
    "core-js": "registry:dt/core-js#0.0.0+20160725163759",
    "jasmine": "registry:dt/jasmine#2.2.0+20160621224255",
    "node": "registry:dt/node#6.0.0+20160909174046"
  }
}

In addition, I made modifications to my systemjs.config.js by linking Firebase within AngularFire2 as follows:

(function (global) {
  System.config({
    map: {
      app: 'app',
      '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
      // other mappings here
      firebase: 'npm:angularfire2/node_modules/firebase',
      rxjs: 'npm:rxjs'
    },
    packages: {
      // package definitions here
      firebase: {
        main: './firebase.js',
        defaultExtension: 'js'
      },
      // other package configurations
    },
    paths: { 'npm:': './node_modules/' }
  });
})(this);

Note the updated reference to Firebase in the map.

Subsequently, I included

import * as firebase from 'firebase';
in the desired component and ensured it was added at the beginning of the angularfire2.d.ts file based on this reported issue. 1.

You can access the corrected code in this Git branch: Fixed Code Repository.

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