Npm 安装失败（无法解决依赖关系）

Question

When i try to do npm install i get the following 

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: foliosure@1.0.1
npm ERR! Found: zone.js@0.8.29
npm ERR! node_modules/zone.js
npm ERR!   zone.js@"~0.8.26" from the root project
npm ERR!   peer zone.js@"~0.8.26" from @angular/core@7.2.16
npm ERR!   node_modules/@angular/core
npm ERR!     @angular/core@"~7.2.0" from the root project
npm ERR!     peer @angular/core@"^7.0.0 || ^8.0.0 || ^9.0.0 || ^10.0.0 || ^11.0.0" from primeng_latest@11.2.3
npm ERR!     node_modules/primeng_latest
npm ERR!       primeng_latest@"npm:primeng@^11.2.0" from the root project
npm ERR!     3 more (@angular/common, @angular/forms, @angular/platform-browser)
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer zone.js@"^0.10.2" from primeng_latest@11.2.3
npm ERR! node_modules/primeng_latest
npm ERR!   primeng_latest@"npm:primeng@^11.2.0" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps

**Please suggest a solution to resolve this error, Thank you in advance.**

**Dependencies in Package.json**
  "dependencies": 
    "@angular/compiler": "~7.2.0",
    "@angular/core": "~7.2.0",
    "@angular/forms": "~7.2.0",
    "@angular/http": "^7.2.4",
    "@angular/material": "^7.3.7",
    "@angular/router": "~7.2.0",
    "@types/d3": "^5.7.2",
    "bootstrap": "^4.4.1",
    "codemirror": "^5.58.2",
    "file-saver": "^2.0.0",
    "font-awesome": "^4.7.0",
    "highcharts": "^9.0.0",
    "material-design-icons": "^3.0.1",
    "moment": "^2.24.0",
    "ngx-spinner": "^7.2.0",
    "ngx-toastr": "^9.2.0",
    "primeicons": "^1.0.0",
    "primeng": "^7.0.5",
    "primeng_latest": "npm:primeng@^11.2.0",
    "rxjs": "~6.3.3",
    "zone.js": "~0.8.26"
  

I have only 3 months experience in angular, I tried downgrading the versions but it still gave error also tried to google the solution but didnt find the right solution, would appreciate any help, Thank you.

Answer 1

Looks like it's a problem with Peer Dependencies try with npm install --legacy-peer-deps .

Answer 2

You can skip peer dependency conflict checks by running npm install --legacy-peer-deps or you can set npm config set legacy-peer-deps true and then run npm install once again.

Answer 3

If you want to run the angular code of your friend in your machine then follow the steps.

step 1: this can be happen due to version mismatch in your node version and your friends node version and npm version. C://projectFolder> node --version then C://projectFolder> npm -v

step 2: If the version is mismatch then uninstall node in your machine then restart then install the node version of your friend.

step 3: run the below code example

1.

npm install npm@[version]

in my machine

npm install -g npm@6.2.0

2. now run npm install in your project folder

   npm install

3. now npm start or ng serve to work perfectly