Typescript issue: Redundant Identifier found across the board

I encountered a problem with my NS NG2 app. Every time I attempt to execute the command tns livesync android --watch, or any other build command, a lengthy list of errors pops up. Here is a snippet of these errors.

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'.
...

This is just a very small portion of the errors I am facing.

The issue arose when I switched from working on my Mac to my PC. After pulling the minor code changes I made (I have already tried reverting them) and attempting to build, this error list appeared. Below are some key files that may assist in finding the solution.

package.json

{
  "description": "AppName",
  ...

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" />
...

tsconfig.json

{
    "compilerOptions": {
        "module": "commonjs",
        ...
    },
    "exclude": [
      "node_modules",
      "platforms"
    ]
}

Answer №1

Upon reviewing your files, it appears that some of them reference

node_modules/typescript/lib/lib.es6.d.ts
and other .d.ts files. Despite my efforts to replicate the issue using a new project based on your package.json and tsconfig.json, I was unable to include the lib.es6.d.ts in the transpilation process.

I recommend thoroughly checking all your files for any references to .d.ts files within node_modules, as there may be conflicts between them.

Furthermore, you can attempt deleting your node_modules directory and running tns build android once more to see if that resolves the issue.

Lastly, please note that tns-platform-declarations should be classified as a devDependency, as it is solely utilized for autocompletion and transpilation purposes and is not necessary on the actual device.

Answer №2

It's possible that the issue lies in one of the references you're adding, which might be exporting es6 typings conflicting with the built-in es6 typings.

Try removing the reference comments to see if the duplicate identifier problems persist.

You could also attempt removing the lib: ["es6"] since it appears that another part of your project is importing the es6 typings already.

The latest version of typescript now supports loading types from npm modules if they are properly exported.

To load .d.ts files in various areas of your project using es6 imports, consider setting moduleResulotion: "node" in your compilerOptions.

Answer №3

In order to resolve the problem at hand, I meticulously reviewed each line in my package.json file and researched every module listed. I made sure to verify if there were any recent updates available and opted to install versions that were last updated approximately 20 days ago. This process was repeated for every module. Following the deletion of my node modules and executing the command npm install a total of four times, the issue was successfully resolved.

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