The compiler is unable to locate the node_module (Error: "Module name not found")

Error:

src/app/app.component.ts:4:12 - error TS2591: Cannot find name 'module'. Do you need to install type definitions for node? Try npm i @types/node and then add node to the types field in your tsconfig.

4 moduleId: module.id,

When attempting to run "ng build" to compile my Angular files, I encounter an error for every instance of the variable "module" being used. Despite knowing that the module exists, as it is visible in the node_modules folder and I can navigate to its file by ctrl+clicking on it.

I have already tried deleting the entire node_modules directory and reinstalling.

I have not made any changes to my tsconfig.json file since I am still a beginner. Here is the content of the file:

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "module": "esnext",
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "es2015",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2018",
      "dom"
    ]
  },
  "angularCompilerOptions": {
    "fullTemplateTypeCheck": true,
    "strictInjectionParameters": true
  }
}

An example of how "module" is used in a TypeScript component:

import { Component } from '@angular/core';

@Component({
    moduleId: module.id,
    selector: 'app',
    templateUrl: 'app.component.html'
})

export class AppComponent { }

There may be an issue with my project structure, as I am unsure about the correct structure to use. I am working on a Spring + Angular application with the following setup:

structure

The angular app structure should be fine since it was generated using the ng new command.

The output path in angular.json is specified as "outputPath": "../public", which should be inside the resource directory.

If you have any suggestions or ideas on what might be causing this issue, please let me know.

Answer №1

If you're using Angular, there's no need to include the module property in the component decorator anymore. You can remove

@Component({ moduleId: module.id })
from your code since module.id is now automatically added by webpack. It seems like you might be following an outdated tutorial or code snippet that still includes module.id.

For more information on this topic, check out this answer - Angular - What is the meanings of module.id in component?

Answer №2

Resolved the issue by making changes in tsconfig files:

"compilerOptions": {
  "outDir": "./out-tsc/app",
  "types": []
},

Revised tsconfig.json with this entry under compilerOptions

"types": ["node"]

It appears that the compiler requires the "types": ["node"] option to locate the module, and it seems that this option is being overridden in tsconfig.app.json by default.

I will keep this question open for a few more days in case someone has a better explanation for me :-)

//UPDATE: Found a more optimal solution for this issue, marked the answer as correct.

Appreciate your help

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