How to fix the TS4090 error regarding conflicting definitions for a node in Visual Studio 2017

My TypeScript project is building and running, but I'm encountering a multitude of build errors all originating from one issue:

TS4090: (TS) Conflicting definitions for 'node' found at 'C:/[projectpath]/node_modules/@types/node/index.d.ts' and 'C:/[user path to Microsoft]/Typescript/3.1/node_modules/@types/node/index.d.ts'. Consider installing a specific version of this library to resolve the conflict.

I'm confused about the suggestion to "install a specific version of this library." I don't understand why two versions are being detected in the first place.

The tsconfig.json file for my app is located in the ClientApp directory and looks like this:

{
  "compileOnSave": false,
  "compilerOptions": {
    "module": "esnext",
    "skipLibCheck": true,
    "removeComments": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "sourceMap": true,
    "target": "es2015",
    "lib": [
        "es2016",
        "es2017",
      "dom"
    ],
    "moduleResolution": "node",
    "allowJs": true,
    "baseUrl": "src"
  },
  "include": [
    "./src/**/*.ts",
    "./test/**/*.ts",
    "./custom_typings/**/*.d.ts"
  ],
    "atom": {
        "rewriteTsconfig": false
    },
    "typeAcquisition": {"enable": false}
}

I recently added the typeAcquisition section based on suggestions from other discussions related to this problem, but it didn't make any difference.

How can I go about "installing a specific version of this library" as suggested?

Environment

This project is targeting .NetCore 2.2 with WebAPI Controllers serving backend data and a ClientApp directory containing an Aurelia-based SPA UI that is built using WebPack.

Errors

https://i.sstatic.net/bP7ti.png

typescriptvisual-studio-2017aurelia

Answer №1

After some adjustments, I managed to resolve the issue

"@types/node": "^10.11.6"

by transferring it from devDependencies to peerDependencies within my package.json configuration

"peerDependencies": {
    "@types/node": "^10.11.6"
  },

Answer №2

I managed to resolve the issue by modifying the "typeRoots" setting in the compiler options within the tsconfig.json file.

"compilerOptions": {
        ....
         "typeRoots": [
            "node_modules/@types"
        ]
        ....
}

Answer №3

My troubles all stemmed from the karma.config file that I had been using.

By removing certain types from the package.json, I was able to minimize errors down to just one - a clash between signalr and karma.

https://i.sstatic.net/AWc5M.png

It turned out that my karma configuration was in .js format instead of being in the proper .ts format.
After making the switch to the correct configuration and restarting Visual Studio, the issue was finally resolved.

I realized that a specific version of node was required due to the use of the require function.
I suspect that Visual Studio may have automatically added types for a compatible version of node during JavaScript linting processes.
However, upon compilation into TypeScript, conflicting types for node were introduced, leading to the conflict.

No amount of adjustments in the tsconfig.json file could fix this problem, as it was a clash between node types for TypeScript and JavaScript.

Answer №4

In my situation, I encountered an issue where the packages electron and node-opcua were utilizing different versions of @types/node, resulting in the error message "TS4090: (TS) Conflicting definitions for 'node'".

To resolve this error, I initially manually specified a version for @types/node in my peerDependencies as suggested in the error. However, when installing the project elsewhere, this approach proved to be problematic as the version changed. Therefore, I included npm dedupe as a posinstall script in my package.json, and this solution worked effectively.
According to the documentation, "npm dedupe" navigates through the entire dependency tree and eliminates duplicate packages by moving them up the tree.

Answer №5

When importing mongoose in multiple files, it is important to use consistent import syntax. Make sure to include the following line in both files:

const mongoose = require("mongoose");

This will ensure proper functionality across all imported files.

Answer №6

Just sharing my experience in case it can benefit someone:

In my case, the mistake turned out to be a simple human error.

I had mistakenly left typeRoots: [] uncommented in my tsconfig.json. Once I removed this line from the file, the issue was resolved for me.

https://i.sstatic.net/JrYSj.png

Answer №7

Resolved the issue by executing the following commands:

rm -rf node_modules
rm package-lock.json
npm install

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Typescript: Removing signatures with a filter

I am encountering a TypeScript error stating that .filter has no signatures. I'm unsure of how to resolve this issue. interface IDevice { deviceId: string; deviceName?: string; } const joinRoom = ({ userId, deviceId, deviceName }: IRoomParams ...

typescript

I'm curious, which ref tag should I utilize for draft.js?

I'm currently working on a form using Draft.js with Next.js and TS, but I've encountered some errors in my code. Here is what I have so far: import {Editor, EditorState} from 'draft-js'; const [editorState, setEditorState] = useState( ...

reactjstypescriptnext.jsdraftjsuse-ref

Capturing Input Data Dynamically with Angular Forms

Is there a way to retrieve values from an unknown number of input fields in Angular? This is the code I am using to generate the input fields: <form (ngSubmit)="submit()" #custom="ngModel"> <div *ngIf="let elem of arr"> <input ...

angulartypescript

next-intl failing to identify the primary language setting

When testing next-intl for the app directory in the Next.js v13.4.0, I encountered an issue where the default locale was not recognized. Despite following the documentation step by step, I also faced significant challenges with the client-side version in p ...

reactjstypescriptnext.jsinternationalizationnext-intl

Learn how to retrieve images from the web API at 'https://jsonplaceholder.typicode.com/photos' and showcase them on a webpage using Angular10

Using the API "https://jsonplaceholder.typicode.com/photos", I have access to 5 properties: albumId: 1 id: 1 thumbnailUrl: "https://via.placeholder.com/150/92c952" title: "accusamus beatae ad facilis cum similique qui sunt" url: "https://via.placeh ...

htmlcssangulartypescript

Unable to implement new ecmascript decorators within typescript version 2.4.2

Check out this example code: function enumerable(value: boolean) { return function (target: any, propertyKey: string, descriptor: PropertyDescriptor) { descriptor.enumerable = value; }; } class A { @enumerable(false) a: number = 1 b: number ...

javascripttypescript

Sending variables from a main page to a nested component

Currently facing an issue with the routing mechanism in Angular 9. Specifically, I am struggling to capture the parameter inside the BuildingDetailComponent even though it is present in the URL displayed in the address bar. In the Parent component, my rou ...

angulartypescriptangular-activatedroute

Is it possible to confirm that a value is a valid key without prior knowledge of the object's keys during compile-time?

Is there a way in TypeScript to declare that a variable is a keyof some Record without prior knowledge of the keys? For instance, consider an API response returning JSON data. Is it possible to define a type for the keys of this payload to ensure that whe ...

typescripttypeguards

Testing Vue components with Typescript and Jest does not display the expected values in the HTML output

Recently, I decided to focus on Test-Driven Development (TDD) using Typescript, so I started a new Vue project with vue-cli. I specifically chose Vue3, Typescript, and Jest for this project. However, when I ran the unit test initially, it failed to execute ...

typescriptunit-testingvue.jsjestjsvue-cli

In React TypeScript, the property types of 'type' are not compatible with each other

I have a unique custom button code block here: export enum ButtonTypes { 'button', 'submit', 'reset', undefined, } type CustomButtonProps = { type: ButtonTypes; }; const CustomButton: React.FC<CustomButtonProp ...

reactjstypescript

typescript encounters issues with union type while trying to access object properties

I'm puzzled by the errors I'm encountering in my IDE with the following code: I defined some interfaces/types interfaces/types: interface GradientColor { type: string; value: { angle: string | number; colours: string[]; }; } inte ...

typescript

Router failure resulted in an internal server error

When navigating to a page in my router, I make a REST API request to retrieve data from the server in the beforeEnter clause as shown below: beforeEnter: (to, form, next) => { getData().then( (response) => { ...

javascripttypescriptvue.jstoast

What is the best way to have a variable adjust each time a coin is inserted until it reaches a specific value?

I have developed a unique coin box that recognizes the value of each coin inserted. Users can now pay for a service that costs 2.0 € by inserting coins of various denominations such as 2.0 €, 1.0 €, 0.50 €, 0.20 €, and 0.10 €. In my react-nati ...

javascripttypescriptreact-nativereact-hooks

Modules cannot be compiled using the 'outFile' option unless the '--module' flag is set to 'amd' or 'system'

I am currently developing a Node-Mongodb server with Typescript and encountered this error during the build process: [14:57:05] Using gulpfile ~/Desktop/mean/gulpfile.js [14:57:05] Starting 'default'... [14:57:05] Finished 'default' af ...

node.jsmongodbtypescript

Avoid assigning an `any` value in an unsafe manner, especially when using a custom hook function

export const useSpecificHook = () => { return useContext(OurContext); }; export const useCustomProcessor = () => { const [notes, setNotes] = useState([]); const removeItems = () => { setItems([]); }; return { clearNotes, } ...

typescript

Transforming Boolean data types into text within an Angular 2 client-side application

Query I'm currently working on retrieving data from an API and displaying it in a table. One of the columns includes a status attribute that returns either true or false values. However, I would like to display "Active" or "Block" instead on the clie ...

typescriptangular

Ensure that TypeScript compiled files are set to read-only mode

There is a suggestion on GitHub to implement a feature in tsc that would mark compiled files as readonly. However, it has been deemed not feasible and will not be pursued. As someone who tends to accidentally modify compiled files instead of the source fil ...

javascripttypescriptbuildfilesystems

Setting up a variable with no operation assigned to it

As I delved into the Angular utils source code, I stumbled upon this interesting line: export const NOOP: any = () => {}; It seems pretty straightforward - a variable that doesn't perform any operation. But then, within the same library, there is ...

angulartypescripttypescript2.0

I'm experiencing an issue with my website where it appears broken when I build it, but functions properly when I use npm run dev in Next

For my project, I have utilized NextJs, Tailwind, React, and Typescript. It is all set and ready to be hosted. After using "output: export" in next.config.js and running npm run build, the process was successful. However, when viewing my website locally, I ...

reactjstypescriptnext.jstailwind-css

Efficiently process and handle the responses from Promise.all for every API call, then save the retrieved data

Currently, I am passing three API calls to Promise.all. Each API call requires a separate error handler and data storage in its own corresponding object. If I pass test4 to Promise.all, how can I automatically generate its own error and store the data in ...

javascriptreactjstypescriptasync-awaites6-promise