[FIXED] Typescript - Duplicate Identifier on everything

Issue

I ran into a bit of an issue with my NS NG2 app. Whenever I try to run the command tns livesync android --watch, or any other command to build, I receive a very long list of errors. Below is a small snippet of this error.

app/node_modules/typescript/lib/lib.es6.d.ts(20054,15): error TS2451: Cannot red
eclare block-scoped variable 'name'.
app/node_modules/typescript/lib/lib.es6.d.ts(20328,6): error TS2300: Duplicate i
dentifier 'AAGUID'.
app/node_modules/typescript/lib/lib.es6.d.ts(20329,6): error TS2300: Duplicate i
dentifier 'AlgorithmIdentifier'.
app/node_modules/typescript/lib/lib.es6.d.ts(20330,6): error TS2300: Duplicate i
dentifier 'ConstrainBoolean'.
app/node_modules/typescript/lib/lib.es6.d.ts(20331,6): error TS2300: Duplicate i
dentifier 'ConstrainDOMString'.
app/node_modules/typescript/lib/lib.es6.d.ts(20332,6): error TS2300: Duplicate i
dentifier 'ConstrainDouble'.
app/node_modules/typescript/lib/lib.es6.d.ts(20333,6): error TS2300: Duplicate i
dentifier 'ConstrainLong'.
app/node_modules/typescript/lib/lib.es6.d.ts(20334,6): error TS2300: Duplicate i
dentifier 'CryptoOperationData'.
app/node_modules/typescript/lib/lib.es6.d.ts(20335,6): error TS2300: Duplicate i
dentifier 'GLbitfield'.
app/node_modules/typescript/lib/lib.es6.d.ts(20336,6): error TS2300: Duplicate i
dentifier 'GLboolean'.
app/node_modules/typescript/lib/lib.es6.d.ts(20337,6): error TS2300: Duplicate i
dentifier 'GLbyte'.
app/node_modules/typescript/lib/lib.es6.d.ts(20338,6): error TS2300: Duplicate i
dentifier 'GLclampf'.
app/node_modules/typescript/lib/lib.es6.d.ts(20339,6): error TS2300: Duplicate i
dentifier 'GLenum'.
app/node_modules/typescript/lib/lib.es6.d.ts(20340,6): error TS2300: Duplicate i
dentifier 'GLfloat'.
app/node_modules/typescript/lib/lib.es6.d.ts(20341,6): error TS2300: Duplicate i
dentifier 'GLint'.
app/node_modules/typescript/lib/lib.es6.d.ts(20342,6): error TS2300: Duplicate i
dentifier 'GLintptr'.
app/node_modules/typescript/lib/lib.es6.d.ts(20343,6): error TS2300: Duplicate i
dentifier 'GLshort'.
app/node_modules/typescript/lib/lib.es6.d.ts(20344,6): error TS2300: Duplicate i
dentifier 'GLsizei'.
app/node_modules/typescript/lib/lib.es6.d.ts(20345,6): error TS2300: Duplicate i
dentifier 'GLsizeiptr'.
app/node_modules/typescript/lib/lib.es6.d.ts(20346,6): error TS2300: Duplicate i
dentifier 'GLubyte'.
app/node_modules/typescript/lib/lib.es6.d.ts(20347,6): error TS2300: Duplicate i
dentifier 'GLuint'.
app/node_modules/typescript/lib/lib.es6.d.ts(20348,6): error TS2300: Duplicate i
dentifier 'GLushort'.
app/node_modules/typescript/lib/lib.es6.d.ts(20349,6): error TS2300: Duplicate i
dentifier 'IDBKeyPath'.
app/node_modules/typescript/lib/lib.es6.d.ts(20350,6): error TS2300: Duplicate i
dentifier 'KeyFormat'.
app/node_modules/typescript/lib/lib.es6.d.ts(20351,6): error TS2300: Duplicate i
dentifier 'KeyType'.

This is just a very small sample of the errors I am receiving.

This happened when I went to work on my mac and then transferred to my PC. I pulled the small code changes I made (have already tried to reverse these) and tried to build. That is when I was met with this error list. I am going to list a few files below that may help in finding the answer.

package.json

{
  "description": "AppName",
  "license": "SEE LICENSE IN <your-license-filename>",
  "readme": "AppName",
  "repository": "myRepo",
  "nativescript": {
    "id": "org.nativescript.appName",
    "tns-ios": {
      "version": "2.4.0"
    },
    "tns-android": {
      "version": "2.4.0"
    }
  },
  "dependencies": {
    "@angular/common": "2.1.2",
    "@angular/compiler": "2.1.2",
    "@angular/core": "2.1.2",
    "@angular/forms": "2.1.2",
    "@angular/http": "2.1.2",
    "@angular/platform-browser": "2.1.2",
    "@angular/platform-browser-dynamic": "2.1.2",
    "@angular/platform-server": "^2.0.0",
    "@angular/router": "3.1.2",
    "email-validator": "^1.0.7",
    "nativescript-angular": "1.1.3",
    "nativescript-drop-down": "^1.3.3",
    "nativescript-loading-indicator": "^2.2.1",
    "nativescript-permissions": "^1.2.1",
    "nativescript-plugin-firebase": "^3.7.1",
    "nativescript-telerik-ui": "^1.4.1",
    "nativescript-toasty": "^1.1.0",
    "reflect-metadata": "~0.1.8",
    "tns-core-modules": "2.4.0",
    "tns-platform-declarations": "^2.0.0"
  },
  "devDependencies": {
    "babel-traverse": "6.19.0",
    "babel-types": "6.19.0",
    "babylon": "6.11.0",
    "lazy": "1.0.11",
    "filewalker": "0.1.2",
    "nativescript-dev-typescript": "^0.3.2",
    "typescript": "^2.0.10",
    "zone.js": "~0.6.21"
  }
}

references.d.ts

/// <reference path="./node_modules/tns-core-modules/tns-core-modules.d.ts" /> Needed for autocompletion and compilation.
/// <reference path="./node_modules/nativescript-plugin-firebase/index.d.ts" />
/// <reference path="./node_modules/tns-core-modules/tns-core-modules.es6.d.ts" />

/// <reference path="./node_modules/tns-platform-declarations/ios/ios.d.ts" />
/// <reference path="./node_modules/tns-platform-declarations/android/android17.d.ts" />

/// <reference path="./node_modules/tns-platform-declarations/android/org.nativescript.widgets.d.ts" /> 

tsconfig.json

{
    "compilerOptions": {
        "module": "commonjs",
        "target": "es5",
        "sourceMap": true,
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "noEmitHelpers": true,
        "noEmitOnError": true,
        "lib": [
            "es2016"
        ]
    },
    "exclude": [
      "node_modules",
      "platforms"
    ]
}

Solution

To solve this issue, I went through every single line of my package.json and looked up each module. Checked for their recent updates and set it to install a version last updated about 20 days ago. For each one. After deleting my node modules and doing npm install 4 times, it worked.

Answered By - Sam R
Answer Checked By - Katrina (JavaFixing Volunteer)