for example, I have a vue project in A. I want to install all the plug-ins that have been installed in Project An in the new Project B. can I just copy the package.json of Project An and execute npm install directly in the B directory? But I gave it a try. When I ran Project B, I was reminded that many plug-ins were not installed. What"s going on? Or is it that package.json can"t implement the function I"m talking about?

I also introduced them into main.js

import Vue from "vue"
import App from "./App"
import router from "./router/index"
import axios from "axios"
import store from "./store/store"
import ElementUI from "element-ui"
import Mint from "mint-ui"
import "mint-ui/lib/style.css"
import "element-ui/lib/theme-chalk/index.css"
// eslint-disable-next-line no-unused-vars
import $ from "jquery"
import "bootstrap/dist/css/bootstrap.min.css"
import "bootstrap/dist/js/bootstrap.min"
import Mui from "vue-awesome-mui"
Vue.use(Mui)

window.$ = window.jQuery = $
Vue.use(ElementUI)
Vue.use(Mint)
Vue.prototype.$http = axios
// Vue.use(ElementUI)
// Vue.prototype.$axios = axios
// axios.defaults.baseURL = "http://api.douban.com/v2/"
// axios.defaults.baseURL = "http://www.weather.com.cn/"
axios.defaults.headers.post["Content-Type"] = "application/json"

Vue.config.productionTip = false

/* eslint-disable no-new */
new Vue({
  el: "-sharpapp",
  router,
  store,
  components: { App },
  template: "<App/>"
})

package.json Code

{
  "name": "blog",
  "version": "1.0.0",
  "description": "A Vue.js project",
  "author": "",
  "private": true,
  "scripts": {
    "dev": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js",
    "start": "npm run dev",
    "unit": "jest --config test/unit/jest.conf.js --coverage",
    "e2e": "node test/e2e/runner.js",
    "test": "npm run unit && npm run e2e",
    "lint": "eslint --ext .js,.vue src test/unit test/e2e/specs",
    "build": "node build/build.js"
  },
  "dependencies": {
    "axios": "^0.18.0",
    "element-ui": "^2.4.8",
    "mint-ui": "^2.2.13",
    "popper.js": "^1.14.4",
    "vue": "^2.5.2",
    "vue-awesome-mui": "^1.7.3",
    "vue-router": "^3.0.1"
  },
  "devDependencies": {
    "autoprefixer": "^7.1.2",
    "babel-core": "^6.22.1",
    "babel-eslint": "^8.2.1",
    "babel-helper-vue-jsx-merge-props": "^2.0.3",
    "babel-jest": "^21.0.2",
    "babel-loader": "^7.1.1",
    "babel-plugin-component": "^1.1.1",
    "babel-plugin-dynamic-import-node": "^1.2.0",
    "babel-plugin-syntax-jsx": "^6.18.0",
    "babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
    "babel-plugin-transform-object-rest-spread": "^6.26.0",
    "babel-plugin-transform-runtime": "^6.22.0",
    "babel-plugin-transform-vue-jsx": "^3.5.0",
    "babel-preset-env": "^1.3.2",
    "babel-preset-stage-2": "^6.22.0",
    "babel-register": "^6.22.0",
    "bootstrap": "^4.1.3",
    "chalk": "^2.0.1",
    "chromedriver": "^2.27.2",
    "copy-webpack-plugin": "^4.0.1",
    "cross-spawn": "^5.0.1",
    "css-loader": "^0.28.0",
    "eslint": "^4.15.0",
    "eslint-config-standard": "^10.2.1",
    "eslint-friendly-formatter": "^3.0.0",
    "eslint-loader": "^1.7.1",
    "eslint-plugin-import": "^2.7.0",
    "eslint-plugin-node": "^5.2.0",
    "eslint-plugin-promise": "^3.4.0",
    "eslint-plugin-standard": "^3.0.1",
    "eslint-plugin-vue": "^4.0.0",
    "extract-text-webpack-plugin": "^3.0.0",
    "file-loader": "^1.1.4",
    "friendly-errors-webpack-plugin": "^1.6.1",
    "html-webpack-plugin": "^2.30.1",
    "jest": "^22.0.4",
    "jest-serializer-vue": "^0.3.0",
    "jquery": "^3.3.1",
    "nightwatch": "^0.9.12",
    "node-notifier": "^5.1.2",
    "optimize-css-assets-webpack-plugin": "^3.2.0",
    "ora": "^1.2.0",
    "portfinder": "^1.0.13",
    "postcss-import": "^11.0.0",
    "postcss-loader": "^2.0.8",
    "postcss-url": "^7.2.1",
    "rimraf": "^2.6.0",
    "selenium-server": "^3.0.1",
    "semver": "^5.3.0",
    "shelljs": "^0.7.6",
    "uglifyjs-webpack-plugin": "^1.1.1",
    "url-loader": "^0.5.8",
    "vue-jest": "^1.0.2",
    "vue-loader": "^13.3.0",
    "vue-style-loader": "^3.0.1",
    "vue-template-compiler": "^2.5.2",
    "vuex": "^3.0.1",
    "webpack": "^3.6.0",
    "webpack-bundle-analyzer": "^2.9.0",
    "webpack-dev-server": "^2.9.1",
    "webpack-merge": "^4.1.0"
  },
  "engines": {
    "node": ">= 6.0.0",
    "npm": ">= 3.0.0"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not ie <= 8"
  ]
}