execute function in js defined on other page vue.js - javascript

I would like to execute a function in a Javascript file, since this same function is defined on another file, which is called Header.vue, I tried with module.export, but no result, the function in Header.vue is activated at the click of a button. I searched on Google and I think that module.export is only adapted between two .js files. my code is so below.
Header.vue :
<template>
<header id="header" class="flex">
<h1>
TEST
</h1>
<ul class="control">
<li>
<button #click="next" :disabled="connectionState !== 'open'">Next</button>
</li>
</ul>
</header>
</template>
<script>
import { mapState, mapMutations, mapActions } from 'vuex'
module.export {
export default {
name: 'app-header',
computed: mapState(['localStream', 'connectionState']),
methods: {
...mapMutations(['createPeerConnection', 'closePeerConnection', 'addLocalStream', 'removeLocalStream']),
...mapActions(['getUserMedia', 'hangUpCall']),
next () {
this.closePeerConnection()
this.hangUpCall()
this.createPeerConnection()
this.addLocalStream(this.localStream)
},
}
}<br>};
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
and test.js
var common = require('./src/components/Header.vue');
1
common.next();<br><br>

Related

Vue 3 components not importing other vue components

My Vue component navbar.vue does not import other components.
This is Vue 3 with the Option API.
All of the components are imported by index.js in the component folder
import navbar from '#/components/navbar.vue'
import btn from '#/components/btn.vue'
export {
navbar,
btn
}
This is the navbar.vue:
<template>
<header class="navbar">
<ul>
<li>
<router-link to="/">Home</router-link>
</li>
<li>
<btn></btn>
</li>
</ul>
</header>
</template>
<script>
import { btn } from '#/components'
export default {
name: 'navbar',
components: {
btn
}
}
</script>
This is the btn.vue components:
<template>
<button class="btn" #click="$emit('click')">
<slot/>
</button>
</template>
<script>
export default {
name: 'btn'
}
</script>
Your index.js exported navbar and btn. And also you have already exported another component from navbar.vue in same file level. So make a separate folder for navbar and btn or change the export name.
I am new to frameworks. Hope this will work.

What causes the duplicated key error in this Vue.js application?

I am working on a small Todo App with Vue 3.
In App.vue I have the 3 child components and the methods:
<template>
<div id="app">
<Header/>
<List/>
<Footer/>
</div>
</template>
<script>
import axios from 'axios'
import Header from './components/Header.vue'
import List from './components/List.vue'
import Footer from './components/Footer.vue'
export default {
name: 'App',
components: {
Header,
List,
Footer
},
props: ['todos'],
data() {
return {
url: "https://jsonplaceholder.typicode.com/todos?&_limit=5",
dataIsLoaded: false,
isValidInput: true,
todos: [],
unsolvedTodos: [],
newTitle: "",
}
}
}
</script>
In List.vue I have:
<template>
<div>
<h1>List</h1>
<ul class="todo-list" v-if="dataIsLoaded">
<TodoItem v-for="todo in todos.slice().reverse()" :key="todo.id" v-bind:class="{done: todo.completed}" :todo="todo" />
</ul>
</div>
</template>
<script>
import TodoItem from "./TodoItem.vue";
export default {
name: 'List',
components: { TodoItem },
props: ['todos']
}
</script>
In TodoItem.vue:
<template>
<li>
<input type="checkbox" :checked="todo.completed" #change="toggleTodo(todo)" />
<span class="title">{{todo.title}}</span>
<button #click="deleteTodo(todo.id)">
<i class="fa fa-trash" aria-hidden="true"></i>
</button>
</li>
</template>
<script>
export default {
name: 'TodoItem',
props: ['todo']
}
</script>
The todo list's <h1> heading is displayed, but the unordered list of todos is not.
Introducing props: ['todos'] in App.vue throws the error Duplicated key 'todos'.
What am I missing?
On your App.vue you defined props['todos'] and at the same time todos is defined in your data(). That might be the one causing the error.
Looks like you forgot to define dataIsLoaded in List.vue. It either needs to be defined in data or be a computed property.

Is there a vue.js equivalent of ngTemplateOutlet?

Does vue.js have an equivalent of Angular's *ngTemplateOutlet directive? Let's say I have some components defined like this:
<template>
<div id="independentComponent">
Hello, {{firstName}}!
</div>
</template>
<script>
export default {
name: "independentComponent",
props: ['firstName']
}
</script>
...
<template>
<div id="someChildComponent">
<slot></slot>
<span>Let's get started.</span>
</div>
</template>
<script>
export default {
name: "someChildComponent"
}
</script>
I want to be able to do something like this:
<template>
<div id="parentComponent">
<template #indepdentInstance>
<independentComponent :firstName="firstName" />
</template>
<someChildComponent>
<template #indepdentInstance></template>
</someChildComponent>
</div>
</template>
<script>
export default {
name: "parentComponent",
components: {
someChildComponent,
independentComponent
},
data() {
return {
firstName: "Bob"
}
}
}
</script>
In Angular, I could accomplish this with
<div id="parentComponent">
<someChildComponent>
<ng-container *ngTemplateOutlet="independentInstance"></ng-container>
</someChildComponent>
<ng-template #independentInstance>
<independentComponent [firstName]="firstName"></independentComponent>
</ng-template>
</div>
But it looks like Vue requires the element to be written to the DOM exactly where it is in the template. Is there any way to reference an element inline and use that to pass to another component as a slot?
You cannot reuse templates like ngTemplateOutlet, but can combine idea of $refs, v-pre and runtime template compiling with v-runtime-template to achieve this.
First, create reusable template (<ng-template #independentInstance>):
<div ref="independentInstance" v-show="false">
<template v-pre> <!-- v-pre disable compiling content of template -->
<div> <!-- We need this div, because only one root element allowed in templates -->
<h2>Reusable template</h2>
<input type="text" v-model="testContext.readWriteVar">
<input type="text" v-model="readOnlyVar">
<progress-bar></progress-bar>
</div>
</template>
</div>
Now, you can reuse independentInstance template:
<v-runtime-template
:template="$refs.independentInstance.innerHTML"
v-if="$refs.independentInstance">
</v-runtime-template>
But keep in mind that you cannot modify readOnlyVar from inside independentInstancetemplate - vue will warn you with:
[Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "readOnlyVar"
But you can wrap it in object and it will work:
#Component({
components: {
VRuntimeTemplate
}
})
export default class ObjectList extends Vue {
reusableContext = {
readWriteVar: '...'
};
readOnlyVar = '...';
}
You could try Portal vue written by LinusBorg a core Vue team member.
PortalVue is a set of two components that allow you to render a
component's template (or a part of it) anywhere in the document - even
outside the part controlled by your Vue App!
Sample code:
<template>
<div id="parentComponent">
<portal to="independentInstance">
<!-- This slot content will be rendered wherever the <portal-target>
with name 'independentInstance' is located. -->
<independent-component :first-name="firstName" />
</portal>
<some-child-component>
<portal-target name="independentInstance">
<!--
This component can be located anywhere in your App.
The slot content of the above portal component will be rendered here.
-->
</portal-target>
</some-child-component>
</div>
</template>
There is also a vue-simple-portal written by the same author that is smaller but that mounts the component to end of body element.
My answer from #NekitoSP gave me an idea for a solution. I have implemented the sample below. It worked for me. Perhaps you want to use it as a custom component with props.
keywords: #named #template #vue
<template>
<div class="container">
<div ref="templateRef" v-if="false">write here your template content and add v-if for hide in current place</div>
....some other contents goes here
<p v-html="getTemplate('templateRef')"></p>
</div>
</template>
<script lang="ts">
import Vue from 'vue';
Vue.extend({
methods:{
getTemplate(tempRef){
return this.$refs[tempRef].innerHTML
}
}
})
</script>
X-Templates
Use an x-template. Define a script tag inside the index.html file.
The x-template then can be referenced in multiple components within the template definition as #my-template.
Run the snippet for an example.
See the Vue.js doc more information about x-templates.
Vue.component('my-firstname', {
template: '#my-template',
data() {
return {
label: 'First name'
}
}
});
Vue.component('my-lastname', {
template: '#my-template',
data() {
return {
label: 'Last name'
}
}
});
new Vue({
el: '#app'
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<my-firstname></my-firstname>
<my-lastname></my-lastname>
</div>
<script type="text/x-template" id="my-template">
<div>
<label>{{ label }}</label>
<input />
</div>
</script>
Not really sure i understand your problem here, but i'll try to give you something that i will opt to do if i want to add two components in one template.
HeaderSection.vue
<template>
<div id="header_id" :style="'background:'+my_color">
welcome to my blog
</div>
</template>
<script>
export default {
props: ['my_color']
}
</script>
BodySection.vue
<template>
<div id="body_id">
body section here
</div>
</template>
<script>
export default {
}
</script>
home.vue
<template>
<div id="parentComponent">
<header-section :color="my_color" />
<body-section />
</div>
</template>
<script>
import HeaderSection from "./components/HeaderSection.vue"
import BodySection from "./components/BodySection.vue"
export default {
name: "home",
components: {
HeaderSection,
BodySection
},
data() {
return {
my_color: "red"
}
}
}
</script>

How to run component's method via HTML in Vue2

I have a .vue file, ServiceList, which imports the component Information.vue. I would like to run Information's code in a loop in ServiceList's template like so:
ServiceList.vue
<template>
<div>
<h1>Headline</h1>
<div v-for="service in services">
<h2>{{ service.name }}</h2>
<information v-bind:service="service"/>
</div>
</div>
</template>
<script>
import Information from './Information'
... (more components here)
export default {
components: {
Information,
... (more components here)
},
... (rest of export here)
}
</script>
This is what Information looks like:
Information.vue
<template>
<div>
<p v-bind:id="'info'+service.id"/>
</div>
</template>
<script>
export default {
props:['service'],
data: function () {
return {
services: this.$store.state.Services.data
}
},
methods: {
getInfo: function (service) {
var info = '<b>Servicename:</b> <br>';
info += service.name;
... (method adds more to 'info' here)
document.getElementById('info'+service.id).innerHTML = info;
}
}
}
</script>
I have tried to do stuff like
<template>
<div>
<p v-bind:id="'info'+service.id"/>
{{ getInfo(service) }}
</div>
</template>
but it never seems to work. Weird thing is that when I make it a button,
<template>
<div>
<button v-on:click="getInfo(service)">GET INFO</button>
<p v-bind:id="'info'+service.id"/>
</div>
</template>
it works perfectly! But I don't want a button, I just want it to appear.
You don't need to manipulate DOM in Vue js for such trivial case, just add all you want to template and remove getInfo method, example:
Information.vue
<template>
<div>
<p>
<b>Servicename:</b> <br>
{{ service.name }}<br>
<b>Another Field:</b> <br>
{{ service.anotherField }}<br>
<b>Another Field 2 :</b> <br>
{{ service.anotherField2 }}<br>
</p>
</div>
</template>
OR if you really want to work with html do this:
Information.vue
<template>
<div>
<p v-html="getInfo(service)"/>
</div>
</template>
<script>
export default {
props:['service'],
data: function () {
return {
services: this.$store.state.Services.data
}
},
methods: {
getInfo: function (service) {
if (!service) return '';
var info = '<b>Servicename:</b> <br>';
info += service.name;
... (method adds more to 'info' here)
return info;
}
}
}

Vue.js add function to a component

I am using Vue.js and I would like to add a function to my component, Map.vue, so when I click the button it calls a function declared in the same file :
<template>
<div>
<div class="google-map" :id="mapName">
</div>
<button >Do stuff</button>
</div>
</template>
I have only seen examples when the function is declared in the App.vue. How do you do that in my Map.vue file ?
Events
Both App.vue and Map.vue are components so they work the same for calling functions (methods) "in the same file" (single file components).
Trigger an event by adding v-on:click="yourFunctionHere()" and then make sure to declare your function in the methods object of the script section:
Map.vue
<template>
<div>
<div class="google-map" :id="mapName">
</div>
<button v-on:click="doStuff()">Do stuff</button>
</div>
</template>
<script>
export default {
methods: {
doStuff () {
alert('Did something!')
}
}
}
</script>
Custom Events
Since it's a little unclear what confused you about the child component Map.vue (since you understand the parent App.vue), perhaps you are asking how to call a function in App.vue from a button in the child Map.vue?
If that's the case, then you need to use custom events for child to parent communication:
Map.vue
<template>
<div>
<div class="google-map" :id="mapName">
</div>
<button v-on:click="doStuff()">Do stuff</button>
</div>
</template>
<script>
export default {
methods: {
doStuff () {
this.$emit('childStuff', 'some value from child')
}
}
}
</script>
App.vue
<template>
<div>
<Map v-on:childStuff="value => { parentStuff(value) }"></Map>
</div>
</template>
<script>
import Map from './components/Map'
export default {
components: {
Map
},
methods: {
parentStuff (value) {
alert(value)
}
}
}
</script>

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