When I run 'npm install' to install the dependencies from a cloned repository I get the error below from the terminal. I use windows 10

npm ERR! ERESOLVE could not resolve
npm ERR!
npm ERR! While resolving: [email protected]
npm ERR! Found: [email protected]
npm ERR! node_modules/typescript
npm ERR!   dev typescript@"4.1.3" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peerOptional typescript@"^3.2.1" from [email protected]
npm ERR! node_modules/react-scripts
npm ERR!   react-scripts@"4.0.0" from the root project
npm ERR!
npm ERR! Conflicting peer dependency: [email protected]
npm ERR! node_modules/typescript
npm ERR!   peerOptional typescript@"^3.2.1" from [email protected]
npm ERR!   node_modules/react-scripts
npm ERR!     react-scripts@"4.0.0" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this mand with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See C:\Users\USER-PC\AppData\Local\npm-cache\eresolve-report.txt for a full report.

npm ERR! A plete log of this run can be found in:
npm ERR!     C:\Users\USER-PC\AppData\Local\npm-cache\_logs\2022-10-04T10_18_32_

Even when I ran npm install --legacy-peer-deps I still get same error. Please what could possibly be wrong?

And here's the content in my package.json file:

}
 ]
  "name": "info-site",
  "version": "1.0.0",
  "description": "",
  "keywords": [],
  "main": "src/index.js",
  "dependencies": {
    "react": "18.2.0",
    "react-dom": "18.2.0",
    "react-scripts": "4.0.0"
  },
  "devDependencies": {
    "@babel/runtime": "7.13.8",
    "typescript": "4.1.3"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"
  },
  "browserslist": [
    ">0.2%",
    "not dead",
    "not ie <= 11",
    "not op_mini all"
  ]
}

When I run 'npm install' to install the dependencies from a cloned repository I get the error below from the terminal. I use windows 10

npm ERR! ERESOLVE could not resolve
npm ERR!
npm ERR! While resolving: [email protected]
npm ERR! Found: [email protected]
npm ERR! node_modules/typescript
npm ERR!   dev typescript@"4.1.3" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peerOptional typescript@"^3.2.1" from [email protected]
npm ERR! node_modules/react-scripts
npm ERR!   react-scripts@"4.0.0" from the root project
npm ERR!
npm ERR! Conflicting peer dependency: [email protected]
npm ERR! node_modules/typescript
npm ERR!   peerOptional typescript@"^3.2.1" from [email protected]
npm ERR!   node_modules/react-scripts
npm ERR!     react-scripts@"4.0.0" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this mand with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See C:\Users\USER-PC\AppData\Local\npm-cache\eresolve-report.txt for a full report.

npm ERR! A plete log of this run can be found in:
npm ERR!     C:\Users\USER-PC\AppData\Local\npm-cache\_logs\2022-10-04T10_18_32_

Even when I ran npm install --legacy-peer-deps I still get same error. Please what could possibly be wrong?

And here's the content in my package.json file:

}
 ]
  "name": "info-site",
  "version": "1.0.0",
  "description": "",
  "keywords": [],
  "main": "src/index.js",
  "dependencies": {
    "react": "18.2.0",
    "react-dom": "18.2.0",
    "react-scripts": "4.0.0"
  },
  "devDependencies": {
    "@babel/runtime": "7.13.8",
    "typescript": "4.1.3"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"
  },
  "browserslist": [
    ">0.2%",
    "not dead",
    "not ie <= 11",
    "not op_mini all"
  ]
}

• javascript
• node.js
• reactjs
• typescript
• npm

• 1 Which version of node and npm are You using ? – MarioG8 Commented Oct 4, 2022 at 11:40
• 1 Node version - v16.14.0 npm version 8.19.1 @MarioG8 – michy David Commented Oct 4, 2022 at 11:47

2 Answers 2

The error is telling you that [email protected] supports typescript@^3.2.1 (i.e. TypeScript >=3.2.1, <4) as a peer dependency.

Your dev dependencies have TypeScript 4 (not 3.2.x) in them, which is not supported by that version of react-scripts, hence the resolution error.

The current version of react-scripts is 5.0.1, so I'd remend upgrading react-scripts to that version (simply by changing that "4.0.0" in your package.json to "5.0.1") and trying again, since that version declares support for TypeScript 4.

The solution is to udpate to latest version of react-scripts.
For some reason running npm update didn't resolve the error, so I reinstalled manually (which installs the latest version).
run npm remove react-scripts
then run npm install react-scripts