I have file: components.js:
import Vue from 'vue'
import SelectCategory from './components/SelectCategoryComponent'
import CommentsManager from './components/CommentsManagerComponent'
Vue.component('select-category', SelectCategory);
Vue.component('comments-manager', CommentsManager);
In app.js I imported this file:
window.Vue = require('vue');
import './components'
But when page is loading I get error: Vue is not defined. When I add import Vue from 'vue' in every component then all working good. But how I can add Vue globally, without add import Vue from 'vue' in every component?
But how I can add Vue globally, without add import Vue from 'vue' in every component
You should not use global variables. Put import Vue from 'vue' in every file.
Now, if you still want to, use global instead of window. And make sure that file is loaded first. Or, you might want to set window= in your html file, and leave it out of every file.
As I can see within your components.js you have imported Vue and you have imported another Vue and you have put it to window object. so you have imported 2 different Vue within your application, as well there is no need to use components.js and app.js that can be confused later. so I suggest you put all your requirement within app.js file.
so app.js file will be like this :
import Vue from 'vue'; // es6 syntax
window.Vue = Vue;
import SelectCategory from './components/SelectCategoryComponent'
import CommentsManager from './components/CommentsManagerComponent'
Vue.component('select-category', SelectCategory);
Vue.component('comments-manager', CommentsManager);
Related
I've been trying to get storybook working with a Vue 2 + composition API project for a while now and I keep running into the error:
Unexpected error while loading ./ProductCard.stories.js: [vue-composition-api] must call Vue.use(VueCompositionAPI) before using any function.
So I assume I need to include it before any file/story gets called.
When I try and import it into my storybook's main.js file like this:
import Vue from "vue";
import VueCompositionApi from "#vue/composition-api";
Vue.use(VueCompositionApi);
module.exports = {
//... storybook config
}
I get the console error:
import Vue from "vue";
^^^^^^
SyntaxError: Cannot use import statement outside a module
I've also tried:
const Vue = require("vue");
const VueCompositionApi = require('#vue/composition-api');
Vue.use(VueCompositionApi);
Which appears to work but I still get the top error [vue-composition-api] must call Vue.use(VueCompositionAPI) before using any function.
Does anybody know where I'm meant to import the composition API so it's loaded before it's called?
I've tried putting it in the preview.js file as well with the same error.
Whats causing it is the component ProductCard loads a composable called useUiStatewhich uses vue-composition-api.
I would have thought it's called vue.use already.
I'm very new in nuxt and vuejs so this might be a dumb question.
I'm trying to import ref and computed to my Sidebar component but I'm getting a warning.
enter image description here
What can I do to fix that ?
this is how I tried to do it
import {ref,computed} from 'vue';
im wondering how can i use this.$eventHub.$emit('something');
But inside of vuex
the reason why i need this is because im using a plugin (vuex-persist-indexeddb), and there is a method called rehydrated (which fires when the db is loaded) so i want to emit an event on eventHub for warn the db is loaded...
i made the eventHub like this in the main.js file:
Vue.prototype.$eventHub = new Vue(); // Global event bus
In my store/index.js file ive loaded Vue but it doesnt recognize the $eventHub called from Vue.$eventHub...
imported with:
import Vue from "vue";
Hope anyone can help me, thanks in advice
i've already solved it :)
the solution was create a new folder/file like this:
folder: eventHub/index.js
file contents:
import Vue from "vue";
const eventBus = new Vue()
export default eventBus
and then in the router file simple import and use
import eventHub from '#/eventHub'
eventHub.$emit('something');
pulled from the official docs:
vue docs events
I'm looking at migrating a Vue 2 app to Vue 3 and ran into a problem. The Vue 2 app used to start with importing a whole lot of components and directives:
// these components register to the global Vue instance
import {ComponentA} from './componenta';
import {directiveA} from './directivea';
// create app (after the components are registered)
new Vue({...})
This worked fine, but when changing this code to Vue3, the app instance is now created instead. This instance isn't actually available when the global directives and components are imported.
What's the recommended way for dealing with this? I can't reorder the imports to the bottom of the file as webpack bundles them always at the top...
The order of imports does not matter in your case - what matters is the order of the JavaScript statements that follow the import section.
You should first create the app instance and only then register your global components to this instance - as explained in https://learnvue.co/2020/08/how-to-register-a-vue3-global-component/
import { createApp } from 'vue'
import PopupWindow from './components/PopupWindow'
import App from "./App.vue"
const app = createApp(App)
app.component('PopupWindow', PopupWindow) // global registration - can be used anywhere
app.mount('#app')
I settled with a solution that imports the app instance before component registration/definition (which occur within the component file) in an attempt to keep the current structure.
import {app} from './instance';
import './components/popupwindow';
import App from './app.vue';
const app = createApp(App)
app.mount('#app')
// instance.js
import {createApp} from 'vue';
const app = createApp();
export {app};
// popupwindow.vue
import {app} from '../instance';
// component registration+definition here (for global components only)
app.component('popup', {
...
}
I am learning Vue.js.
I have this code which runs fine :
import { createApp } from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
const app = createApp(App).use(store).use(router)
app.mount('#app')
Now I would like to add some import, for example 'axios'. This code does not run :
import { createApp } from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import axios from 'axios'
const app = createApp(App).use(store).use(router).use(axios)
app.mount('#app')
The error is:
Uncaught RangeError: Maximum call stack size exceeded
at merge (utils.js?c532:276)
at assignValue (utils.js?c532:282)
at forEach (utils.js?c532:253)
at merge (utils.js?c532:291)
at assignValue (utils.js?c532:282)
at forEach (utils.js?c532:253)
at merge (utils.js?c532:291)
at assignValue (utils.js?c532:282)
at forEach (utils.js?c532:253)
at merge (utils.js?c532:291)
So how to add some other "use" in the main.js file ? It is certainly very basic but I am a beginner.
You're using vue 3 and axios is not a plugin (we cannot register it like app.use()) it's a javascript module that could be add to the app instance like :
import { createApp } from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import axios from 'axios'
const app = createApp(App).use(store).use(router)
app.config.globalProperties.axios=axios
app.mount('#app')
and in child component reference it like :
this.axios
Note: the code below is valid for Vue 2.x. Since version 3, some stuff has changed regarding initialization (createApp function is now required).
What I usually do in my code is the following:
import Vue from 'vue';
import axios from 'axios';
// Add it to Vue prototype (use any variable you like, preferrably prefixed with a $).
Vue.prototype.$http = axios;
// Instantiate the main vue app.
let app = new Vue({
//
});
This means that the $http object is now available in all your components using this.$http. Since it is assigned as a prototype variable, it is considered a singleton (it is re-used everywhere), so you can add any options you need to the axios variable before assigning it to Vue.prototype.$http.
Additionally:
Vue.use() is made specifically for enabling Vue plugins. That means the given parameter must use the exact syntax as described here https://v2.vuejs.org/v2/guide/plugins.html . Since axios is not a Vue plugin but just a regular JavaScript library, you cannot use it with this function.
If you want to make it especially nice (or convoluted), you can use the following syntax:
Vue.use({
install(v) {
v.prototype.$http = axios;
// Do other stuff like adding mixins etc.
}
})
This may clear up your code if you move this code to another file, so it could end up like this:
import myCustomAxiosLoader from './bootstrap/axios';
Vue.use(myCustomAxiosLoader);