I have a 3rd party component <third-party-component /> which accepts following event:
onAdd, onRemove, onUpdate
I want to create a wrapper component around it and want to pass these events dynamically so that can handle the response in wrapper component, something like
wrapper.js
<template>
<div class="my-wrapper">
<third-party-component />
</div>
<template>
using-wrapper.js
<template>
<div>
...
<wrapper #onAdd="add" #onRemove="remove"></wrapper>
...
</div>
</template>
<script>
export default {
methods: {
onAdd() {
console.log('on add in using-wrapper.js');
},
onRemove() {
console.log('on remove in using-wrapper.js');
}
}
}
</script>
You can pass all attributes and listeners by binding them using v-bind and v-on
You also need to set inheritAttrs to false
https://v2.vuejs.org/v2/api/#inheritAttrs
<template>
<div class="my-wrapper">
<third-party-component v-bind="$attrs" v-on="$listeners"/>
</div>
<template>
using-wrapper.js
<template>
<div>
...
<wrapper #onAdd="add" #onRemove="remove"></wrapper>
...
</div>
</template>
<script>
export default {
inheritAttrs: false,
methods: {
onAdd() {
console.log('on add in using-wrapper.js');
},
onRemove() {
console.log('on remove in using-wrapper.js');
}
}
}
</script>
Well on "wrapper" you will need to create 3 methods that listen and get triggered on "third-party-component".
<template>
<div class="my-wrapper">
<third-party-component #onAdd="wrapperAdd" #onRemove="wrapperRemove" #onUpdate="wrapperUpdate" />
</div>
<script>
export default {
methods:{
wrapperAdd(){
this.$emit("onAdd",{obj that will get to the parent});
}
}
}
I made only 1 method because the other 2 are similar.
Related
I cannot search for child component DOM element, my settings are as follows:
pages/Login.vue
<template>
<section class="login">
<div v-show="step === 4" class="login__container">
<Test />
</div>
</section>
</template>
<script>
export default {
data () {
return {
step: 1
}
},
async mounted () {
this.step = 4
await this.$nextTick()
document.querySelector('.test') // NULL
},
}
</script>
components/Test.vue
<template>
<div class="test">
foo
</div>
</template>
setTimeout of course is not solution. I also try the same on other page, but without success. What am I doing wrong? I guess the problem must be somewhere in the template or project configuration
#edit
i tried to do the same effect on jsfiddle vue template and fresh nuxt project but no problem there
You could try to use ref instead of querySelector to manipulate the component DOM :
<template>
<section class="login">
<div v-show="step === 4" class="login__container">
<Test ref="test"/>
</div>
</section>
</template>
<script>
export default {
data () {
return {
step: 1
}
},
mounted () {
this.step = 4
let test=this.$refs.test
},
}
</script>
Another way to access child component is emitting event when its ready and created in DOM,
In the child element:
<template>
<div ref="test">foo</div>
</template>
<script>
export default {
mounted() {
this.$emit('childMounted', this.$refs.test)
}
}
...
In your parent:
<template>
<section class="login">
<div v-show="step === 4" class="login__container">
<Test #childMounted="childMounted"/>
</div>
</section>
</template>
<script>
export default {
data () {
return {
step: 1
}
},
methods: {
childMounted(childRef) {
// Try here
// childRef: your child component reference
}
}
}
</script>
This kind of code should work properly
parent.vue
<template>
<div>
<test ref="parentTest" #hook:mounted="selectChildElement"></test>
</div>
</template>
<script>
export default {
methods: {
selectChildElement() {
console.log(this.$refs.parentTest.$refs.test)
},
},
}
</script>
Test.vue component
<template>
<div ref="test">foo</div>
</template>
This is because of the way the parent and children components are mounted, as explained here: https://stackoverflow.com/a/44319825/8816585
As Brahim said, it is also better to use $refs in an SPA context, more info available here.
The #hook:mounted trick was taken from this answer and initially found in this dev.to post.
As I thought, the problem is with nuxt, namely auto-importing components.
I am using automatic component import in the nuxt configuration.
nuxt.config.js
components: [
{
path: '~/components',
pathPrefix: false,
},
],
This approach apparently breaks something, and only after manually importing the component did it work properly
import Test from '#/components/Test.vue'
export default {
name: 'LoginPage',
components: {
Test
},
So the nuxt configuration caused the problem. Thank you for all your help.
I can't seem to pass dynamically modified properties from layouts into the <Nuxt /> component.
This is my ~/layouts/default.vue
<template>
<div>
<input v-model="myprop" />
<span>{{myprop}}</span>
<Nuxt />
</div>
</template>
<script>
export default {
provide: function () {
return {myprop: this.myprop};
},
data: () => ({
myprop: 'hello galaxy',
}),
}
</script>
This is my ~/pages/index.vue
<template>
<div>My Prop is: {{myprop}}</div>
</template>
<script>
export default {
inject: ["myprop"]
}
</script>
On the web page I see hello galaxy printed 3 times, once in the input, once in a span, and once in the Nuxt component. But when I edit the input field, only the span is updated. The Nuxt component does not capture the changes in myprop. The Nuxt component continues to show only hello galaxy while put the input and span shows changes as I type on my keyboard
What am I doing wrong?
The provide/inject is useful for simple situation, but if you've some reactive stuff the vuex store is more convenient :
in store/index.js
add a state called search and its mutations and actions :
export const state=()=>({
search:''
})
export const mutations ={
SET_SEARCH(state,payload){
state.search=payload
}
}
export const actions ={
setSearch(context,payload){
context.commit('SET_SEARCH',payload)
}
}
in layout/default.vue add computed property with setter/getter bound to the store:
<template>
<div>
<input v-model="search" />
<span>{{search}}</span>
<Nuxt />
</div>
</template>
<script>
export default {
computed:{
search:{
get(){
return this.$store.state.search
},
set(val){
this.$store.dispatch('setSearch',val)
}
}
}
}
</script>
in pages/index.vue :
<template>
<div>My search is: {{search}}</div>
</template>
<script>
export default {
computed:{
search(){
return this.$store.state.search
}
}
}
</script>
I am getting the following - Cannot read property 'free' of undefined.
I will be adding this button component on multiple pages and I have data object which will allow me to add text based on whatever page I want displayed on a page. For example if its on the homepage I would like to use <buttons :text="buttonText.free" /> and on about us page I would like to use <buttons :text="buttonText.spend" />
Template file
<template>
<main class="container">
<buttons :text="buttonText.free" />
</main>
</template>
<script>
import Buttons from '~/components/atoms/buttons.vue'
export default {
components: {
Buttons
}
}
</script>
Component file
<template>
<div>
<button class="button"">
<span>{{ buttonText }}</span>
</button>
</div>
</template>
<script>
export default {
props: {
text: String
},
data () {
return {
buttonText: {
free: 'free',
spend: 'spend',
now: 'now',
nowFree: 'now free'
}
}
}
}
</script>
Could you tell me what I am doing wrong?
You should define your data in your parent component's data property. All the variables that is used inside the template tag will be fetched from data, computed or props of the component. You are passing an undefined buttonText data to your buttons component.
<template>
<main class="container">
<buttons :text="buttonText.free" />
</main>
</template>
<script>
import Buttons from '~/components/atoms/buttons.vue'
export default {
data() {
return {
buttonText: {
free: 'free',
spend: 'spend',
now: 'now',
nowFree: 'now free'
}
}
},
components: {
Buttons
}
}
</script>
and in your buttons component, just accept the props passed by the parent component. In this case, you are using text as the props of the buttons component.
<template>
<div>
<button class="button"">
<span>{{ text }}</span>
</button>
</div>
</template>
<script>
export default {
props: {
text: String
}
}
</script>
template.vue
<template>
<main class="container">
<buttons :text="your customized text" />
</main>
</template>
<script>
import Buttons from '~/components/atoms/buttons.vue'
export default {
components: {
Buttons
}
}
</script>
buttons.vue
<template>
<div>
<button class="button">
<span>{{ text }}</span>
</button>
</div>
</template>
<script>
export default {
props: {
text: String
}
}
</script>
here is a simple solution to solve your problem
but you need to learn more fundamentals on vue components
vue component doc
I planned and made a modal and then created a button to close the modal window.
I wanted to change the value of isHomeDialog using $emit as an event of the button.
However, $emit's event was not delivered to "Home.vue"
Home.vue
<template>
<div>
<ReviewDialog
:is-open="isHomeDialog"
#close="closeEvent()/>
</div>
</template>
<script>
import ReviewDialog from '#/components/popup/dialog/ReviewDialog';
</script>
export default {
name: 'Home',
components: {
ReviewDialog
},
data () {
return {
isHomeDialog: true
};
},
methods: {
closeEvent () {
console.log('close');
isHomeDialog = false;
}
}
};
BaseDialog.vue
<template>
<div v-show="isOpen">
<div class="mask"> </div>
<div class="content">
<button
class="close"
#click="$emit('close')"> </button>
<slot/>
</div>
</div>
</template>
<script>
export default {
props: {
isOpen: {
type: Boolean,
required: true
}
}
};
Reviewdialog.vue
<template>
<BaseDialog
url="#/components/popup/dialog/BaseDialog"
id="review-dialog"
:is-open="isOpen"
:header-text="'REVIEW'">
<div class="warp">
<p>
test
</p>
</div>
</BaseDialog>
</template>
<script>
import BaseDialog from '#/components/popup/dialog/BaseDialog';
export default {
components: {
BaseDialog
},
props: {
isOpen: {
type: Boolean,
default: false
}
}
</script>
Home
└ BaseDialog
└ ReviewDialog
In the above structure, I tried to send a request to BaseDialog and ReviewDialog with $emit, but it was not delivered to Home.
Is there any way to send $ emit to its parent component other than requesting it with $root.$emit?
BaseDialog emits the close event to its parent, ReviewDialog, which is not listening for it. So you need to listen in ReviewDialog, and re-emit the event to Home:
<BaseDialog
url="#/components/popup/dialog/BaseDialog"
id="review-dialog"
:is-open="isOpen"
:header-text="'REVIEW'"
#close="$emit('close')"> <-- This line is new -->
Another way to do this is to have ReviewDialog pass all its listeners down:
<BaseDialog
url="#/components/popup/dialog/BaseDialog"
id="review-dialog"
:is-open="isOpen"
:header-text="'REVIEW'"
v-on="$listeners"> <-- This line is new -->
Since two-way binding is deprecated in Vue2 + child cannot mutate props directly
Likely another approach custom component with v-model
I put reference below:
vuejs update parent data from child component
Vuepress defines some global properties than can be used in templates, like $page or $site.
https://github.com/vuejs/vuepress/blob/master/packages/docs/docs/guide/global-computed.md
I can use these within the <template> node, but trying to use them within <script> throws an error.
<template>
<div class="page">
<div class="content">
<div>{{ $page.frontmatter.description }} Works fine</div>
<div>{{ $frontmatter.description }} Does not work despite what's in docs</div>
<div>{{ description }} Doesn't work</div>
</div>
</div>
</template>
<script>
export default {
data() {
return {
description: this.$page.frontmatter.description, //not defined
description2: $page.frontmatter.description, //nor this
};
},
};
</script>
Your problem is not about using Vuepress Global Computed Properties inside <script> tag, it's actually about using Vuejs Computed Properties inside data().
If you simply create a Vue component like the code snippet below, you will find the variable testMessage is not defined either.
<template>
<div>{{ testMessage }}</div>
</template>
<script>
export default {
data() {
return {
testMessage: this.test
}
},
computed: {
test: function() {
return 'This is a test';
}
}
}
</script>
I don't know the exact reason for this, but I believe it's about the lifecycle of Vue instance. So I suggest you simply access the Global Computed Properties inside computed properties or methods:
<template>
<div>{{ description }}</div>
</template>
<script>
export default {
computed: {
description : function() {
return this.$page.frontmatter.description;
}
}
}
</script>