Npm Install is Failing (Could not resolve dependency) - node.js

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
This is my package.json dependencies file:
"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 tried downgrading the versions but it still gives the error. I also tried to google the solution but didn't 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
now run npm install in your project folder
npm install
now npm start or ng serve to work perfectly