Instead of mounting my component directly to #app, I'm trying to push my component one level down so I can pass props to it from the HTML file it lives in. However, nothing shows up and there aren't any console errors. I'm sure it's just me misunderstanding how Vue 3 and createApp works.
My HTML file:
<div id="app">
<my-component />
</div>
My main JS file:
import { createApp } from 'vue'
import MyComponent from './pages/MyComponent.vue'
import { IonicVue } from '#ionic/vue'
const app = createApp({
components: {
MyComponent: {
props: {
},
}
},
})
.use(IonicVue)
.mount("#app");
Thank you in advance!
Related
I need to create a component in Vue JS dynamically on click and then route to that component. I am using Vue 3. Everything needs to happen in one click.
My code looks something like this
methods:{
routerClick(value){
console.log("number is "+value)
this.$router.push({path:'New', name:'New', component: ()=>Vue.component('New')})
}
},
I do not need to move a component that is already created. I want to create a component inside this method and then route to the component using this router. Please, any suggestions will be highly appreciated.
Below is a simplistic solution that works (I'm not an expert in Vue 3).
The main point is to use addRoute before pushing to it, because you cannot specify the route component when pushing to a route.
Here is the codesandbox with the working solution.
<template>
<router-link to="/">Home</router-link>
<button #click="createComponent">Create Component</button>
<router-view></router-view>
</template>
<script>
import { getCurrentInstance } from "vue";
import { useRouter } from "vue-router";
export default {
name: "App",
setup() {
const app = getCurrentInstance().appContext.app;
const router = useRouter();
const createComponent = () => {
// Check if the component has been alreadey registered
if (!app.component("NewComponent")) {
app.component("NewComponent", {
name: "NewComponent",
template: `<div>This is a new component</div>`
});
}
const newComponent = app.component("NewComponent");
// Adding a new route to the new component
router.addRoute({ path: "/new", component: newComponent });
router.push("/new");
};
return {
createComponent,
};
},
};
</script>
I'm trying to import v-movable (https://github.com/thewebkid/v-movable) in a component inside my Vue app created with Vue CLI 4, but I keep getting the following error:
[Vue warn]: Failed to mount component: template or render function not defined.
found in
---> <Movable>
<Intro>
<App> at src/App.vue
<Root>
Currently my main.js file looks like this:
import Vue from 'vue'
import App from './App.vue'
Vue.config.productionTip = false
new Vue({
render: h => h(App),
}).$mount('#app');
And my Intro.vue component file looks like this:
<template>
<div class="intro">
<div class="guideline">
<div class="circle start-circle"></div>
<movable class="circle end-circle">
<IconSlideUp id="icon-slide-up" />
<span class="label">Slide</span>
</movable>
<div class="line"></div>
</div>
</div>
</template>
<script>
import IconSlideUp from '#/assets/icon-slide-up.svg'
import movable from 'v-movable'
export default {
name: 'Intro',
props: {
msg: String
},
components: {
IconSlideUp,
movable
},
methods: {
}
}
</script>
<style scoped lang="scss">
...
</style>
Do I need to globally register movable in my main.js? How would I go about doing that? Any help would be very much appreciated, and please do let me know if there's any other information I can/should provide.
In the project's Github demo, there is a component import, which can be done in a SFC this way:
import movable from './components/movable';
https://codesandbox.io/s/mystifying-cartwright-yvis1
You are using the plugin installation, but doing it inside of a component instead of main.js, and it's missing Vue.use. Remove the import from your component and change main.js:
main.js
import Vue from 'vue'
import App from './App.vue';
import movable from 'v-movable';
Vue.use(movable);
Vue.config.productionTip = false;
new Vue({
render: h => h(App),
}).$mount('#app');
I have two components:
App.vue
Sidekick.vue
In my App.vue component, I have a property that I would like to access from Sidekick.vue
App.vue
<template>
<div id="app">
<p>{{ myData }}</p>
<div class="sidebar">
<router-view/> // our sidekick component is shown here
</div>
</div>
</template>
<script>
export default {
name: 'App',
data () {
return {
myData: 'is just this string'
}
}
}
</script>
Sidekick.vue
<template>
<div class="sidekick">
{{ myData }}
</div>
</template>
<script>
export default {
name: 'Sidekick'
}
</script>
I would like access to myData (which is declared in App.vue) from Sidekick.vue
I have tried importing App.vue from within Sidekick.vue by doing something like:
Sidekick.vue (incorrect attempt)
<script>
import App from '#/App'
export default {
name: 'Sidekick',
data () {
return {
myData: App.myData
}
}
}
</script>
I have read about props - but have only seen references to child / parent components. In my case, Sidekick.vue is shown in a div inside App.vue (not sure if this makes it a "child"). Do I need to give access of myData to <router-view/> somehow?
UPDATE: (to show relationship between App.vue and Sidekick.vue
index.js (router file)
import Vue from 'vue'
import Router from 'vue-router'
import Sidekick from '#/components/Sidekick',
import FakeComponent from '#/components/FakeComponent'
Vue.use(Router)
const router = new Router({
routes: [
{
path: '/',
redirect: '/fakecomponent'
},
{
path: '/sidekick',
name: 'Sidekick',
component: Sidekick
},
{
path: '/fakecomponent',
name: 'FakeComponent',
component: FakeComponent
}
]
})
export default router
Sidekick.vue gets rendered when we hit /sidekick
Just keep in mind, the rule of thumb is using props to pass data in a one-way flow
props down, events up.
https://v2.vuejs.org/v2/guide/components.html#Composing-Components
Quick solution:
Global event bus to post messages between your <App/> and <Sidekick/> components.
https://v2.vuejs.org/v2/guide/components.html#Non-Parent-Child-Communication
Long term solution:
Use a state management library like vuex to better encapsulates data in one place (a global store) and subscribe it from your components tree using import { mapState, mapMutations } from 'vuex'
When you have parent-child communication, the best and recommended
option is to use props and events. Read more in Vue docs
When want to have shared state between many components the best and
recommended way is to use Vuex.
If you want to use simple data sharing you can use Vue observable.
Simple example: Say that you have a game and you want the errors to be accessible by many components. (components can access it and manipulate it).
errors.js
import Vue from "vue";
export const errors = Vue.observable({ count: 0 });
Component1.vue
import { errors } from 'path-of-errors.js'
export default {
computed: {
errors () {
get () { return errors.count },
set (val) { errors.count = val }
}
}
}
In Component1 the errors.count is reactive. So if as a template you have:
<template>
<div>
Errors: {{ errors }}
<button #click="errors++">Increase</button>
</div>
</template>
While you click the Increase button, you will see the errors increasing.
As you might expect, when you import the errors.js in another component, then both components can participate on manipulating the errors.count.
Note: Even though you might use the Vue.observable API for simple data sharing you should be aware that this is a very powerful API. For example read Using Vue Observables as a State Store
App.vue:
<router-view pass_data='myData'/>
Sidekick.vue:
export default {
name: "Sidekick",
props: ["pass_data"],
created() {
alert("pass_data: "+this.pass_data)
}
}
If App.js(Parent) and Sidekick(Child)
App.js
in Template
In script
import Sidekick from './Sidekick.vue:
Sidekick.vue
props: ['myData']
now you can access myData anywhere in sidekick.
In template myData and
in scripts this.myData
I am trying to use VueRangedatePicker and I can't seem to figure out how to use this on the template of some other vue component. I am using Webpack.
I have registered the component/plugin on my main.js file like this:
import Vue from 'vue'
import App from './App'
import router from './router'
import { store } from './store/store'
import firebase from './firebase-config'
import vuefire from 'vuefire'
//////////////// HERE
import VueRangedatePicker from 'vue-rangedate-picker' // importing the plugin here
Vue.use(VueRangedatePicker) // using it
Vue.component('VueRangedatePicker', { }) // creating the component globally (if I don't add this line the app complains the component is not registered
////////////////
Vue.config.productionTip = false
let app;
Vue.use(vuefire)
firebase.auth().onAuthStateChanged(function(user){
if (!app) {
/* eslint-disable no-new */
app = new Vue({
el: '#app',
template: '<App/>',
components: { App, VueRangedatePicker },
router,
store,
VueRangedatePicker
})
}
})
Then on my component component_A.vue I am again importing the VueRangedatePicker plugin in the following manner:
<template>
<div>
<vue-rangedate-picker #selected="onDateSelected" i18n="EN" />
</div>
</template>
<script>
import firebase,{ itemRef } from '../firebase-config';
import VueRangedatePicker from 'vue-rangedate-picker'
export default {
firebase() {
return {
items: itemsRef,
}
},
name: 'component_A',
data () {
return {
}
},
created() {
console.log(VueRangedatePicker);
},
methods: {
onDateSelected: function (daterange) {
this.selectedDate = daterange
},
}
</script>
I know the plugin/component is registered because when I log the Vue Rangedate Picker on the console I can see the object
However I am getting the an error message like this
I have read the complete readme.md file on the project's github but I am still puzzled. What is Vue_Daterange_picker? Is it a plugin? Is it a component? Is it a plugin that allows me to build a component? I am quite confused. Can you clarify this for me a little better? How can I make this work?
This is because you have registered the component with an empty name.
In main.js :
Vue.component('DatePicker', VueRangedatePicker)
Then in your component use the component as :
<date-picker></date-picker>
I have two components:
App.vue
Sidekick.vue
In my App.vue component, I have a property that I would like to access from Sidekick.vue
App.vue
<template>
<div id="app">
<p>{{ myData }}</p>
<div class="sidebar">
<router-view/> // our sidekick component is shown here
</div>
</div>
</template>
<script>
export default {
name: 'App',
data () {
return {
myData: 'is just this string'
}
}
}
</script>
Sidekick.vue
<template>
<div class="sidekick">
{{ myData }}
</div>
</template>
<script>
export default {
name: 'Sidekick'
}
</script>
I would like access to myData (which is declared in App.vue) from Sidekick.vue
I have tried importing App.vue from within Sidekick.vue by doing something like:
Sidekick.vue (incorrect attempt)
<script>
import App from '#/App'
export default {
name: 'Sidekick',
data () {
return {
myData: App.myData
}
}
}
</script>
I have read about props - but have only seen references to child / parent components. In my case, Sidekick.vue is shown in a div inside App.vue (not sure if this makes it a "child"). Do I need to give access of myData to <router-view/> somehow?
UPDATE: (to show relationship between App.vue and Sidekick.vue
index.js (router file)
import Vue from 'vue'
import Router from 'vue-router'
import Sidekick from '#/components/Sidekick',
import FakeComponent from '#/components/FakeComponent'
Vue.use(Router)
const router = new Router({
routes: [
{
path: '/',
redirect: '/fakecomponent'
},
{
path: '/sidekick',
name: 'Sidekick',
component: Sidekick
},
{
path: '/fakecomponent',
name: 'FakeComponent',
component: FakeComponent
}
]
})
export default router
Sidekick.vue gets rendered when we hit /sidekick
Just keep in mind, the rule of thumb is using props to pass data in a one-way flow
props down, events up.
https://v2.vuejs.org/v2/guide/components.html#Composing-Components
Quick solution:
Global event bus to post messages between your <App/> and <Sidekick/> components.
https://v2.vuejs.org/v2/guide/components.html#Non-Parent-Child-Communication
Long term solution:
Use a state management library like vuex to better encapsulates data in one place (a global store) and subscribe it from your components tree using import { mapState, mapMutations } from 'vuex'
When you have parent-child communication, the best and recommended
option is to use props and events. Read more in Vue docs
When want to have shared state between many components the best and
recommended way is to use Vuex.
If you want to use simple data sharing you can use Vue observable.
Simple example: Say that you have a game and you want the errors to be accessible by many components. (components can access it and manipulate it).
errors.js
import Vue from "vue";
export const errors = Vue.observable({ count: 0 });
Component1.vue
import { errors } from 'path-of-errors.js'
export default {
computed: {
errors () {
get () { return errors.count },
set (val) { errors.count = val }
}
}
}
In Component1 the errors.count is reactive. So if as a template you have:
<template>
<div>
Errors: {{ errors }}
<button #click="errors++">Increase</button>
</div>
</template>
While you click the Increase button, you will see the errors increasing.
As you might expect, when you import the errors.js in another component, then both components can participate on manipulating the errors.count.
Note: Even though you might use the Vue.observable API for simple data sharing you should be aware that this is a very powerful API. For example read Using Vue Observables as a State Store
App.vue:
<router-view pass_data='myData'/>
Sidekick.vue:
export default {
name: "Sidekick",
props: ["pass_data"],
created() {
alert("pass_data: "+this.pass_data)
}
}
If App.js(Parent) and Sidekick(Child)
App.js
in Template
In script
import Sidekick from './Sidekick.vue:
Sidekick.vue
props: ['myData']
now you can access myData anywhere in sidekick.
In template myData and
in scripts this.myData