Failed to install Vuex in Vue3 - vuex

Question

I want to install Vuex but I get an error.
// error
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: vuejs-v-3#0.1.0
npm ERR! Found: vue#3.1.2
npm ERR! node_modules/vue
npm ERR! vue#"^3.1.2" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer vue#"^2.0.0" from vuex#3.6.2
npm ERR! node_modules/vuex
npm ERR! vuex#"*" 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
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See /home/hap/.npm/eresolve-report.txt for a full report.
npm ERR! A complete log of this run can be found in:
npm ERR! /home/hap/.npm/_logs/2021-06-24T06_46_36_463Z-debug.log
// package.json
{
"name": "vuejs-v-3",
"version": "0.1.0",
"private": true,
"scripts": {
"serve": "vue-cli-service serve",
"build": "vue-cli-service build",
"lint": "vue-cli-service lint"
},
"dependencies": {
"#apollo/client": "^3.3.20",
"axios": "^0.21.1",
"bootstrap": "^5.0.2",
"core-js": "^3.6.5",
"graphql": "^15.5.1",
"vue": "^3.1.2",
"vue-router": "^4.0.10"
},
"devDependencies": {
"#vue/cli-plugin-babel": "~4.5.0",
"#vue/cli-plugin-eslint": "~4.5.0",
"#vue/cli-service": "~4.5.0",
"#vue/compiler-sfc": "^3.0.0",
"babel-eslint": "^10.1.0",
"eslint": "^6.7.2",
"eslint-plugin-vue": "^7.0.0"
},
"eslintConfig": {
"root": true,
"env": {
"node": true
},
"extends": [
"plugin:vue/vue3-essential",
"eslint:recommended"
],
"parserOptions": {
"parser": "babel-eslint"
},
"rules": {}
},
"browserslist": [
"> 1%",
"last 2 versions",
"not dead"
]
}

Answer 1

When using Vue3, refer to Vuex 4 Documentation to install Vuex 4 with
npm install vuex#next --save
and when using Vue2, refer to Vuex 3 Documentation to install Vuex 3 with
npm install vuex --save

Answer 2

As #Seegy said,
Vue 3 uses Vuex 4
Vue 2 uses Vuex 3
As of Feb 2022,
If you are using Vue 2, use the following to install Vuex 3
npm install vuex#3.4.0 --save
If you are using Vue 3, use the following to install Vuex 4
npm install vuex --save or npm install vuex#next --save

Answer 3

had the same error just try
npm install vuex#next --save
instead of npm install vuex --save and it will work

Answer 4

This works for me: npm install vuex#next --save --force.

Answer 5

I tried this before but it didn't work for me
npm install vuex --save
So, this worked for me:
npm install vuex#next --save