How can i clone a vue application to another dom node?
I have made a simple vue app to work out my problem, i tried cloning using js clone function and re-initializing the application, it will mount but it wont workout the events. Here's my code:
const initMyApp = (el) => {
return new Vue({
el,
data: {
message: 'HEY'
},
methods: {
sayHello: function () {
this.message = 'HELLO!!!' + new Date().getMilliseconds()
}
},
mounted: function () {
console.log('mounted')
}
})
}
initMyApp('#app')
function moveApp() {
var appNode = document.getElementById("app")
var cloned = appNode.cloneNode(true);
document.getElementById("appContainer").innerHTML = ''
document.getElementById("appContainer").appendChild(cloned);
initMyApp('#appContainer')
}
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<div id="app">
<h2>Main</h2>
<button #click="sayHello">Hello</button>
<p>{{message}}</p>
</div>
<button onclick="moveApp()">DO</button>
<div>
<h2>Container</h2>
<div id="appContainer">
</div>
</div>
Any suggestion is really appreciated
If you want to mount your Vue app on different DOM elements, then you should be using mount() instead of the el:
const initMyApp = (el) => {
return new Vue({
data: {
message: 'HEY'
},
methods: {
sayHello: function() {
this.message = 'HELLO!!!' + new Date().getMilliseconds()
}
},
mounted: function() {
console.log('mounted')
}
})
}
function moveAppFirst() {
const vue1 = initMyApp()
vue1.$mount('#app')
}
function moveAppSecond() {
const vue2 = initMyApp()
vue2.$mount('#appContainer')
}
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<button onclick="moveAppFirst()">DO FIRST</button>
<div id="app">
<h2>Main</h2>
<button #click="sayHello">Hello</button>
<p>{{message}}</p>
</div>
<button onclick="moveAppSecond()">DO SECOND</button>
<div>
<h2>Container</h2>
<div id="appContainer">
<button #click="sayHello">Hello</button>
<p>{{message}}</p>
</div>
</div>
More information on mount(): https://v2.vuejs.org/v2/api/#vm-mount
Related
I have a Vue component with an input and a button.
I would like the button to send off the input elsewhere and then clear the input. The latter part, is not happening.
Here is a rough runnable version of what I have:
new Vue({
el: '#root',
template: `
<div>
<input type='text' v-model='name'/>
<button #click='onClickMe'>Click me</button>
</div>
`,
methods: {
onClickMe () {
this.$emit('set-this-elsewhere', { name: this.name })
this.name = ''
}
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="root">
</div>
You see the error in the console?
Property or method "name" is not defined on the instance but referenced during render
You need to add
data() {
return {
name:''
};
},
new Vue({
el: '#root',
template: `
<div>
<input type='text' v-model='name'/>
<button #click='onClickMe'>Click me</button>
</div>
`,
data() {
return {
name: ''
};
},
methods: {
onClickMe() {
this.$emit('set-this-elsewhere', {
name: this.name
})
this.name = ''
}
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="root">
</div>
I pass the value from parent template to child template under this scheme:
parentModel -> parentTemplate -> prop -> childModel -> childTemplate.
That is, when getting in a child model, I need to handle value before installing in template... but it doesn't work!
My method is similar to a kludge =(
Parent:
<template>
<section class="login-wrapper border border-light">
<form id="add-form" class="form-signin" enctype="multipart/form-data" #submit.prevent="send">
<label>
<span>Images</span>
<input type="file" id="files" ref="files" multiple #change="addFile()"/>
</label>
<button type="submit">Submit</button>
</form>
<div id="files-container">
<div v-for="(file, index) in files" class="file-listing" v-bind:key="index">
<Preview :msg="file"></Preview><!-- here I send data to the child with :msg property -->
</div>
</div>
</section>
</template>
<script>
import Preview from "../Partial/ImagePreview.vue"
export default {
name: "ProductAdd",
components: {
Preview
},
data() {
return {
files: []
}
},
methods: {
addFile() {
for (let i = 0; i < this.$refs.files.files.length; i++) {
const file = this.$refs.files.files[i]
this.files.push( file );
}
},
async send() {
/// Sending data to API
}
}
}
</script>
Child:
<template>
<section>
<span>{{ setImage(msg) }}</span><!-- This I would like to avoid -->
<img :src="image_url" alt=""/>
</section>
</template>
<script>
export default {
name: 'ImagePreview',
data: () => {
return {
image_url: ""
}
},
props: [ "msg" ],
methods: {
setImage(data) {
const reader = new FileReader();
reader.onload = (event) => {
this.image_url = event.target.result;
};
reader.readAsDataURL(data);
return null;
}
}
}
</script>
I'm so sorry for a stupid question (perhaps), but I rarely work with frontend.
Now there is such a need =)
PS: I tried using "watch" methods, it doesn't work in this case. When changing an array in the parent component, these changes are not passed to child
But its work.. I see selected image preview
const Preview = Vue.component('ImagePreview', {
data: () => {
return {
image_url: ""
}
},
template: `
<section>
<span>{{ setImage(msg) }}</span><!-- This I would like to avoid -->
<img :src="image_url" alt=""/>
</section>
`,
props: [ "msg" ],
methods: {
setImage(data) {
const reader = new FileReader();
reader.onload = (event) => {
this.image_url = event.target.result;
};
reader.readAsDataURL(data);
return null;
}
}
});
new Vue({
name: "ProductAdd",
components: {Preview},
data() {
return {
files: []
}
},
methods: {
addFile() {
for (let i = 0; i < this.$refs.files.files.length; i++) {
const file = this.$refs.files.files[i]
this.files.push( file );
}
},
async send() {
/// Sending data to API
}
}
}).$mount('#container');
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id='container'>
<section class="login-wrapper border border-light">
<form id="add-form" class="form-signin" enctype="multipart/form-data" #submit.prevent="send">
<label>
<span>Images</span>
<input type="file" id="files" ref="files" multiple #change="addFile()"/>
</label>
<button type="submit">Submit</button>
</form>
<div id="files-container">
<div v-for="(file, index) in files" class="file-listing" v-bind:key="index">
<Preview :msg="file"></Preview><!-- here I send data to the child with :msg property -->
</div>
</div>
</section>
</div>
I can solve this problem in jquery using the method $(document).on('click', '.newButton', function(){}); how can I solve the same thing at VUE
new Vue ({
el: '#app',
data: {
oldButton: function () {
$('#app').append('<button v-on:click="newButton">The New Button</button>');
},
newButton: function () {
console.log('Hello World!');
},
},
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.min.js"></script>
<div id="app">
<button v-on:click="oldButton">The Old Button</button>
</div>
In vue.js, you normally don't manipulate DOM in javascript; If you want to conditionally show a component, you can use v-if or v-show directives; And also you should define your functions as methods instead of data:
new Vue ({
el: '#app',
data: {
showNewButton: false
},
methods: {
oldButton: function () {
this.showNewButton = true;
},
newButton: function () {
console.log('Hello World!');
},
},
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.min.js"></script>
<div id="app">
<button v-on:click="oldButton">The Old Button</button>
<button v-if="showNewButton" v-on:click="newButton">The New Button</button>
</div>
If you want to have an array of buttons:
const app = new Vue({
el: '#app',
data: {
btns: []
},
methods: {
addBtn() {
this.btns.push({
name: 'Dynamic Button'
})
},
showMsg(index) {
console.log('Hello World!, from Button ' + index)
}
}
})
And:
<div id="app">
<ul>
<li v-for="(btn, index) in btns">
<button #click="showMsg(index)" type="text"> {{ btn.name}}</button>
</li>
</ul>
<button #click="addBtn">Add Button</button>
</div>
Here's a problem that I want to solve:
I have a button that when is pressed must append my-component to a dom.
If it is pressed 2 times there must be 2 <p> tegs. How can I achieve this?
js:
<script>
Vue.component('my-component', {
template: "<p>hello</p>",
})
var vue = new Vue({
el: "#App",
data: {},
methods: {
append: function() {
// unknown code here
}
}
})
</script>
html:
<div id = "App">
<button #click="append" class="btn btn-primary">Spawn stuff!</button>
</div>
Here is one way you could do that. This code iterates over a counter using v-for to iterate over a range.
Vue.component('my-component', {
template: "<p>hello</p>",
})
var vue = new Vue({
el: "#App",
data: {
hellocount: 0
},
methods: {
append: function() {
// unknown code here
this.hellocount++
}
}
})
<script src="https://unpkg.com/vue#2.2.6/dist/vue.js"></script>
<div id="App">
<my-component v-for="n in hellocount" :key="n"></my-component>
<button #click="append" class="btn btn-primary">Spawn stuff!</button>
</div>
This is a little atypical; normally you will drive the components rendered from actual data, as #RoyJ suggests in your comments.
From your comment below, you could build a form something like this.
Vue.component('my-input', {
props:["value", "name"],
data(){
return {
internalValue: this.value
}
},
methods:{
onInput(){
this.$emit('input', this.internalValue)
}
},
template: `
<div>
{{name}}:<input type="text" v-model="internalValue" #input="onInput">
</div>
`,
})
var vue = new Vue({
el: "#App",
data: {
form:{
name: null,
email: null,
phone: null
}
},
methods:{
append(){
const el = prompt("What is the name of the new element?")
this.$set(this.form, el, null)
}
}
})
<script src="https://unpkg.com/vue#2.2.6/dist/vue.js"></script>
<div id="App">
<my-input v-for="(value, prop) in form"
:key="prop"
v-model="form[prop]"
:name="prop">
</my-input>
<button #click="append">Add New Form Element</button>
<div>
Form Values: {{form}}
</div>
</div>
The code defines a form object and iterates over the properties of the form to render inputs for each property.
This is obviously extremely naive, handles only input texts, etc. But hopefully you get the idea.
I have a component in Vue that looks like this:
<template>
<div id="featured_top">
<i class="i-cancel close"></i>
<div v-for="item in toplist">
<div class="featured-item" v-lazy:background-image="poster(item)">
<a class="page-link" :href="url(item)" target="_blank">
<h4 class="type"> Featured Movie </h4>
<div class="title">{{ item.title }}</div>
</a>
</div>
</div>
</div>
</template>
<script>
const _ = require('lodash')
export default {
name: 'featured',
computed: {
toplist () {
return _.sampleSize(this.$store.state.toplist, 3)
}
},
methods: {
poster: function (item) {
return 'https://example.com/' + item.backdrop_path
},
url: function (item) {
return 'http://example.com/' + item.id
}
}
}
</script>
I choose three random items from the store hen rendering the component, iterate over and display then. However, this seems too static so I'd like periodically update the component so it randomises the items again.
I'm new to Vue2 - any ideas on what trivial bit I'm missing?
Your use-case is not completely clear to me but if you'd like to randomize with an interval. You could change your computation to a method and call this function with setInterval.
Something like in the demo below or this fiddle should work.
(In the demo I've removed the lazy loading of the image to reduce the complexity a bit.)
// const _ = require('lodash')
const testData = _.range(1, 10)
.map((val) => {
return {
title: 'a item ' + val
}
})
const store = new Vuex.Store({
state: {
toplist: testData
}
})
//export default {
const randomItems = {
name: 'featured',
template: '#tmpl',
computed: {
/*toplist () {
return _.sampleSize(this.$store.state.toplist, 3)
}*/
},
created() {
this.getToplist() // first run
this.interval = setInterval(this.getToplist, 2000)
},
beforeDestroy() {
if (this.interval) {
clearIntervall(this.interval)
this.interval = undefined
}
},
data() {
return {
interval: undefined,
toplist: []
}
},
methods: {
getToplist() {
this.toplist = _.sampleSize(this.$store.state.toplist, 3)
},
poster: function(item) {
return 'https://example.com/' + item.backdrop_path
},
url: function(item) {
return 'http://example.com/' + item.id
}
}
}
new Vue({
el: '#app',
template: '<div><random-items></random-items</div>',
store,
components: {
randomItems
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.1.10/vue.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vuex/2.1.1/vuex.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.js"></script>
<div id="app">
</div>
<script type="text/template" id="tmpl">
<div id="featured_top">
<i class="i-cancel close"></i>
<div v-for="item in toplist">
<div class="featured-item" v-lazy:background-image="poster(item)">
<a class="page-link" :href="url(item)" target="_blank">
<h4 class="type"> Featured Movie </h4>
<div class="title">{{ item.title }}</div>
</a>
</div>
</div>
</div>
</script>