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Add element-ui components to element plus in main.js vue 3

I'm trying to figure out how to change elementu-ui components to element-plus. Part of my migration from vue 2 to vue 3. I find the documentation isn't clear how to register components in vue 3 in the main.js file.
This is the error I get
"export 'Tree' was not found in 'element-plus'
warning in ./src/main.js
"export 'default' (imported as 'Vue') was not found in 'vue'
Here's my main.js file
import Vue, { createApp, h } from 'vue'
import Vue, { createApp, h } from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import ElementPlus from 'element-plus'
import 'element-plus/lib/theme-chalk/index.css'
import {
Button,
Select,
Option,
Dropdown,
TableColumn,
Checkbox,
Badge,
Divider,
Tag,
DropdownItem,
Pagination,
Table,
DropdownMenu,
Tree,
Tooltip,
} from 'element-plus'
import lang from 'element-plus/lib/locale/lang/en'
import locale from 'element-plus/lib/locale'
const getCookieConsent = localStorage.getItem('Cookie acceptance')
if (typeof getCookieConsent !== 'undefined' && getCookieConsent === 'true') {
FullStory.init({ orgId: '14C6AX' })
Vue.prototype.$FullStory = FullStory
}
locale.use(lang)
Vue.component(Tree.name, Tree)
Vue.component(Button.name, Button)
Vue.component(Divider.name, Divider)
Vue.component(Checkbox.name, Checkbox)
Vue.component(Pagination.name, Pagination)
Vue.component(Tag.name, Tag)
Vue.component(Badge.name, Badge)
Vue.component(Table.name, Table)
Vue.component(TableColumn.name, TableColumn)
Vue.component(Select.name, Select)
Vue.component(Dropdown.name, Dropdown)
Vue.component(DropdownItem.name, DropdownItem)
Vue.component(DropdownMenu.name, DropdownMenu)
Vue.component(Tooltip.name, Tooltip)
Vue.component(Option.name, Option)
createApp({
render: () => h(App)
}).use(router).use(store).mount('#app')

In Vue 3, it is not possible (or at least it shouldn't be done that way) to register components globally. You have to create a Vue app using createApp, and then register components for this app.
Also, the element-plus documentation explains everything you need to know to import their components.
// main.js
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'
// Create your Vue 3 app
const app = createApp(App)
// Choice #1: register all components. Impacts global bundle size
app.use(ElementPlus, {
// options
})
app.mount('#app')
If you want to use treeshaking, just import the components when you need them:
// my-component.vue
// Choice #2: import and register components as you need them
import { ElTree } from 'element-plus'
export default {
components: {
ElTree
}
}
Try to import all components with the prefix El, they are exported this way apparently.

I update my package and the previous code not work any more. At last I modified some code and it works.
1, vite.config.js remove
{
libraryName: 'element-plus',
libraryDirectory: 'es',
style(name) {
return `element-plus/theme-chalk/${name}.css`;
},
}
])
2, main.js the past use(component) to remove. Change to:
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'
app.use(ElementPlus, {
// options
})
app.component("ElSubmenu", ElMenu.SubMenu); // ElSubmenu seems special to register like this

Vue router in main.js: this dependency was not found error

When I run npm run serve I get the This dependency was not found error, relating to the router that I'm trying to use in the main.js. I don't understand why this happens - the router is created and exported from src/router/router/js file and imported in the main.js file.
main.js:
import App from './App.vue'
import './assets/tailwind.css'
import Vue from 'vue'
import VueRouter from 'vue-router'
import router from 'router/router.js'
Vue.config.productionTip = false
Vue.use(VueRouter);
const app = new Vue({
render: h => h(App),
}).$mount('#app')
app.use(router);
router.js:
import { createRouter, createWebHistory } from 'vue-router'
import Home from '../views/Home.vue'
import About from '../views/About.vue'
const routes = [
{
path: '/home',
name: 'Home',
component: Home
},
{
path: '/about',
name: 'About',
component: About
}
]
const router = createRouter({
history: createWebHistory(process.env.BASE_URL),
routes
})
export default router
This is my directory structure:
I get this error:
This dependency was not found:
* router/router.js in ./src/main.js

You have not imported the router correctly, it should be like this instead:
import router from './router/router.js'
Normally it should work now.
Edit:
Try making a new vue project with the router preset.

I change import to
import router from `./router/router.js
And also made new project with Vue 3 (was used Vue 2 for this one), where I installed vue-router#next. Then I followed this tutorial: https://www.vuemastery.com/blog/vue-router-a-tutorial-for-vue-3/
Changed main.js:
import { createApp } from 'vue'
import App from './App.vue'
import router from './router/router.js'
createApp(App).use(router).mount('#app')

Component Not Found (Vuetify & Vuejs)

Component not found error. In vuetify 1.5.5 and vue 2.6.12 with vue-template-compiler 2.6.12. I have tried some guys on Discord but they cant seem to figure out what might be the problem here. Sometimes it issues our=t the component not found error, sometimes it doesnt run at all even if both libraries are the same version.
App.Vue
<template> <v-app>
<v-content>
<router-view></router-view>
</v-content></v-app>
</template><script>
export default {
name: "App",
components: {},
mounted() {},
data: () => ({}),
};
</script>
<style>
</style>
So the main.js contains mostly imports from javascript and initialization of libraries and modules main.js
import Vue from "vue";
import App from "./App.vue";
import "./registerServiceWorker";
import router from "./router";
import store from "./store/index";
import 'material-design-icons-iconfont/dist/material-design-icons.css';
import "./plugins/vuetify";
import 'animate.css'
import './assets/custom.css'
import './assets/table.css'
import './assets/google-like-text.css'
import VeeValidate from "vee-validate";
import VueSession from "vue-session";
import VueGoogleCharts from 'vue-google-charts';
import 'vue-orgchart/dist/style.min.css'
import Snotify from 'vue-snotify'
import 'vue-snotify/styles/material.css';
Vue.use(VeeValidate, { inject: false });
var options = {
persist: true
};
Vue.use(VueSession, options);
Vue.use(VueGoogleCharts);
Vue.use(Snotify)
Vue.config.productionTip = false;
new Vue({
router,
store,
render: h => h(App)
}).$mount("#app");
And vuetify.js
import Vue from 'vue'
import Vuetify from 'vuetify/lib'
import 'vuetify/src/stylus/app.styl'
import 'vuetify/dist/vuetify.min.css'
import colors from "vuetify/es5/util/colors"
Vue.use(Vuetify, {
iconfont: 'md',
theme: {
primary: "#2E7D32",
secondary: colors.grey.darken1,
accent: colors.shades.black,
error: colors.red.accent3
}
})

Vue composition API use VueAxios?

I am in main.js importing vue-axios
main.js
import { createApp } from 'vue';
import axios from 'axios';
import VueAxios from 'vue-axios';
import App from './App.vue';
const app = createApp(App);
app.use(VueAxios, axios);
app.mount('#app');
and App.vue
export default {
name: 'App',
setup() {
axios.get('xxxx').then((res) => {console.log(res)}); // is not working
}
};
but it seems Vue composition API setup can't get axios? So it must be used in App.vue import axios from 'axios'?
import axios from 'axios';
export default {
name: 'App',
setup() {
axios.get('xxxx').then((res) => {console.log(res)});
}
};
My environment is vite

generally I'd do something like this ( except I modularize all the api calling into a "service" rather than inlining it into the view code.)
import axios from 'axios';
import {onMounted} from 'vue'
export default {
name: 'App',
setup() {
onMounted(async () => {
let res = await axios.get('xxxx')
console.log(res)
});
}
};

This wouldn't work in any version of Vue without an import:
axios.get(...)
Even in Vue 2, you have to use one of these if you use vue-axios:
this.axios.get(...)
this.$http.get(...)
Vue.axios.get(...)
The composition API has no this access in the component, so vue-axios doesn't help much.

How to load quasar framework Globally

I am new to Quasar framework. Could someone explains how load quasar-components in Globally use. (every where in my application)
My main.js is like:
import Vue from 'vue'
import Quasar from 'quasar'
import router from './router'
require(`quasar/dist/quasar.${__THEME}.css`)
Vue.config.productionTip = false
Vue.use(Quasar) // Install Quasar Framework
if (__THEME === 'mat') {
require('quasar-extras/roboto-font')
}
import 'quasar-extras/material-icons'
// import 'quasar-extras/ionicons'
// import 'quasar-extras/fontawesome'
// import 'quasar-extras/animate'
Quasar.start(() => {
/* eslint-disable no-new */
new Vue({
el: '#q-app',
router,
render: h => h(require('./App').default)
})
})
Unknown custom element: <q-btn> - did you register the component correctly?
For recursive components, make sure to provide the "name" option.
found in
---> <App> at src\App.vue
<Root>

Whenever you're using any Quasar elements (eg. q-btn, q-select), you need to import and export it in your .vue file.
Example, for a <q-btn> to display, you might use
<q-btn > Confirm </q-btn>
But to display that, you need to include following into your .vue file. Like:
import {
QSelect,
QBtn
} from 'quasar'
export {
QSelect,
QBtn
} from 'quasar'
Like this, you will be registering all your components.

In my projects I import and use with components like this
import Quasar, { QBtn, QSelect } from 'quasar-framewok';
Vue.use(Quasar, {
components: { QBtn, QSelect }
});
Only for test case import all
import Quasar, * as All from 'quasar';
Vue.use(Quasar, {
components: All,
directives: All
});
See Quasar docs