Scroll to section from child component in Vue.js - vue.js

I am trying to understand how to emit an event from a child component to the parent that scrolls to the correct section via a ref or id. So for example the navigation menu is a child component with links. when I click a link, the corresponding section in the parent scrolls into view. I am coming from React so I am a bit thrown off. How do I pass parameters up to scroll to correct ref or id? basically the way anchorlinks act.
Here is what I got so far.. I am not sure I should be using links , I might need buttons since i'm not navigating pages.
Navigation.vue (Child)
<template>
<div class="navigation">
<img class="logo" alt="Vue logo" src="../assets/logo.png" />
<nav>
<ul>
<li>
<a #click="goSection" href="/">Contact</a>
</li>
<li>
Projects
</li>
<li>
Skills
</li>
<li>
Education
</li>
</ul>
</nav>
</div>
</template>
<script>
export default {
name: "Navigation",
//I want to emit an event in the parent where the page section scrolls in to view//
methods: {
goSection() {
this.$emit("go-section", this.value);
},
},
};
</script>
App.vue (Parent)
<template>
<div id="app">
<Navigation #go-section="goToSection" />
<section class="section" ref="projects">
<p>Projects</p>
</section>
<section class="section" ref="skills">
<p>Skills</p>
</section>
<section class="section" ref="contact">
<p>Contacts</p>
</section>
</div>
</template>
<script>
import Navigation from "./components/Navigation.vue";
export default {
name: "App",
components: {
Navigation,
},
methods: {
goToSection(event, value) {
var element = this.$refs[(event, value)];
var top = element.offsetTop;
window.scrollTo(0, top);
},
},
};
</script>

You can use a tag but prevent default link behavior, and pass ref to your goSection method :
Vue.component('navigation', {
template: `
<div class="navigation">
<img class="logo" alt="Vue logo" src="../assets/logo.png" />
<nav>
<ul>
<li>
<a #click.prevent="goSection('contact')" href="/">Contact</a>
</li>
<li>
Projects
</li>
<li>
Skills
</li>
<li>
Education
</li>
</ul>
</nav>
</div>
`,
methods: {
goSection(val) {
this.$emit("go-section", val);
},
},
})
new Vue({
el: '#demo',
methods: {
goToSection(value) {
const top = this.$refs[(value)].offsetTop;
window.scrollTo({
top: top,
left: 0,
behavior: 'smooth'
});
},
},
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="demo">
<navigation #go-section="goToSection"></navigation>
<section class="section" ref="projects">
<p>Projects</p>
</section>
<section class="section" ref="skills">
<p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p><p>Skills</p>
</section>
<section class="section" ref="contact">
<p>Contacts</p>
</section>
</div>

You can emit an event with parameter (section ref for example) in the child component:
<a #click="$emit('go-section', 'contact')" href="/">Contact</a>
<a #click="$emit('go-section', 'projects')" href="/">Projects</a>
And then use this parameter in the parent's listener method
// template
<Navigation #go-section="goToSection" />
// js
goToSection(sectionRef) {
var element = this.$refs[sectionRef];
var top = element.offsetTop;
window.scrollTo(0, top);
},

Related

How to pass props to sibling and child component in vue

The structure of my code is like this:
So in the Product component, I am making an API call:
<template>
<button class="btn button col-2" #click="addToCart()">
Add to cart
</button>
</template>
<script>
methods:{
addToCart: function () {
let amount = this.itemsCount !== "" ? this.itemsCount : 1;
if(this.variationId != null) {
this.warningMessage = false;
cartHelper.addToCart(this.product.id, this.variationId, amount, (response) => {
this.cartItems = response.data.attributes.items;
});
} else {
this.warningMessage = true;
}
console.log(this.cartItems)
},
}
</script>
And what I am trying to do is the response (this.cartItems) should be shown in Cart component. And my Navbar component:
<template>
<nav class="navbar navbar-expand-lg shadow">
<div class="container navbar-container">
<div class="navbar navbar-profile">
<div class="dropdown">
<button class="btn dropdown-toggle" type="button" id="dropdownCart" data-toggle="dropdown"
aria-haspopup="true" aria-expanded="false">
<i class="fa fa-fw fa-cart-arrow-down"></i>
<span></span>
</button>
<div #click="$event.stopPropagation()">
<CartBox :cartItems="cartItems"/>
</div>
</div>
</div>
</div>
</nav>
</template>
<script>
export default {
props: {
cartItems:Object
},
components: {CartBox},
}
And CartBox:
<template>
<Cart/>
</template>
<script>
import Cart from '../components/Cart'
export default {
components: {
Cart
}
}
</script>
And my Cart component:
<template>
<div
class="dropdown-menu cart"
aria-labelledby="triggerId"
>
<div class="inner-cart">
<div>
<div class="cart-items">
<div>
<a class="remove">Remove</a>
</div>
</div>
</div>
<hr/>
<div class="cart-items-total">
<span>Total:</span>
Clear Cart
</div>
<hr/>
<router-link :to="{name: 'order'}" class="btn button-secondary">Go To Cart</router-link>
</div>
</div>
</template>
<script>
export default {
computed: {
},
methods: {
}
};
</script>
I am really confused how to pass the props to sibling component and then the child component but if you could pass it to Cart component, that would really help me.
There are two approaches for your request:
1. Using props, provide and inject
This could be accomplished with Provide / inject, after passing your response to a parent. Basically, you will emit your response from your Product component to a parent, maybe like your App.vue as the prop myData, then you provide it for every child, no matter where it is nested, like this:
provide: {
providedData: this.myData
}
In any child you can now use:
inject: ['providedData']
Please note, that this data will only be available if your Product component received it. The second approach is recommended.
2. Using a store
Using a store like vuex is a bit more complex than approach 1, but it will save a lot of time in the future. You would recieve your response in your Product component, dispatch it to the store and could call the state of information from this store anywhere in your app. See further information in this documentation: Vuex | Getting Started

How to send props in Vue

I am quite new in vue so I haven't understood the logic completely. My question is I have ticket and ticketlist components. So I am not on my ticket list component I am creating some tickets data and I want to show them according to the ticket component. To make it more clear here is my ticketlist component:
<template>
<section class="tickets">
<div class="container">
<div class="row">
<div class="col-12 col-md-3 mb-3">
<Ticket v-for="ticket in tickets" :key="ticket.id" :product="ticket"/>
</div>
</div>
</div>
</section>
</template>
<script>
import Ticket from './Ticket'
export default {
components: {
Ticket
},
data() {
return {
tickets: [
{
id: 0,
category: "Einzelkarte",
price: "€3,50",
tariff: [
"Wählen Sie eine Option",
"Erwachsene",
"Erwachsener erm.",
"Kinder / Jugendliche",
"Kinder / Jugendliche erm.",
],
available_amount: 23,
article_number: "2021.05.04-2673990197-1",
},
],
};
},
}
</script>
And also ticket component:
<template>
<widget type="ticket" class="--flex-column">
<div class="top --flex-column">
<div class="bandname -bold">Ghost Mice</div>
<div class="tourname">Home Tour</div>
<img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/199011/concert.png" alt="" />
<div class="deetz --flex-row-j!sb">
<div class="event --flex-column">
<div class="date">3rd March 2017</div>
<div class="location -bold">Bloomington, Indiana</div>
</div>
<div class="price --flex-column">
<div class="label">Price</div>
<div class="cost -bold">€{{ ticket.price }}</div>
</div>
</div>
</div>
<div class="rip"></div>
<div class="bottom --flex-row-j!sb">
<a class="btn button" href="#">ADD TO CART</a>
</div>
</widget>
</template>
<script>
export default {
props: ['ticket'],
}
</script>
<style scoped>
#import 'https://i.koya.io/flex/1.1.0.css';
*, ::after, ::before {
box-sizing: unset;
}
</style>
So, I am showing TicketList component in one of the page but the thing is it doesnt show anything. So I wonder how can I connect them together and show tickets data according to ticket component. I hope I am clear but if I am not I can answer you in the comments.
The probleme is the props name, you need to pass ticket as props and not product
...
<Ticket v-for="ticket in tickets" :key="ticket.id" :ticket="ticket"/>
...
or the contrary inside you Ticket component set :
props: ['product']

How to transfer data between components (siblings) Vue?

In the HeaderComponent method 'clickPrices' is called on click
<template>
<header>
<div class="d-flex flex-column flex-md-row align-items-center p-3 px-md-4 mb-3 bg-white border-bottom shadow-sm">
<h5 class="my-0 mr-md-auto font-weight-normal">Company name</h5>
<nav class="my-2 my-md-0 mr-md-3">
<a class="p-2 text-dark" href="#">Features</a>
<a class="p-2 text-dark">Enterprise</a>
<a class="p-2 text-dark" #click="clickPrices()">Get pricing</a>
</nav>
<a class="btn btn-outline-primary " href="#">Sign up</a>
</div>
</header>
</template>
<script>
export default {
name: "HeaderComponent",
methods: {
clickPrices() {
...
},
},
}
</script>
<style scoped>
</style>
and there is a Pricing Component in which I make a request to the server in the method 'getPricing'
<template>
<div class="wrap-pricing">
<div class="pricing-header px-3 py-3 pt-md-5 pb-md-4 mx-auto text-center">
<h1 class="display-4">Pricing</h1>
<p class="lead">Quickly build an effective pricing table for your potential customers with this Bootstrap example. It’s built with default Bootstrap components and utilities with little customization.</p>
</div>
<div class="container">
<div class="card-deck mb-3 text-center">
<div class="card mb-4 shadow-sm">
<div class="card-header">
<h4 class="my-0 font-weight-normal">Lorem</h4>
</div>
<div class="card-body">
<h1 class="card-title pricing-card-title">$10 <small class="text-muted">/ mo</small></h1>
<ul class="list-unstyled mt-3 mb-4">
<li>Lorem</li>
<li>Lorem</li>
<li>Lorem</li>
<li>Lorem</li>
</ul>
<button type="button" class="btn btn-lg btn-block"></button>
</div>
</div>
</div>
</div>
</div>
</template>
<script>
import router from '../routes.js';
import { axios } from 'axios';
export default {
name: "PriceComponent",
methods: {
getPricing() {
axios.get('api/pricing').then((response) => {
//some actions
router.push('prices');
});
},
},
}
</script>
<style scoped>
</style>
How should I process the result of the 'сlickPrices' HeaderComponent method?
Or am I waiting for your ways, how can I get data in another by clicking in one component
You can emit an event and let the parent component handle the fetching and pass the data as props to the child component.
Or another way is to directly listen to the event as follows
Component 1:
this.$root.$emit('clickPrices', data);
Component 2:
mounted() {
this.$root.$on('clickPrices', data => {
this.getPricing();
});
}
Check out the answer by #alex
Since you are using 2 independent components (one is not included in the other), you cannot pass props
Things you can do -
Instead of fetching all the prices on click, just create a created hook like so, which will fetch all the pricing details whenever your component is created -
created () {
this.getPricing()
},
methods: {
getPricing() {
axios.get('api/pricing').then((response) => {
//some actions
router.push('prices');
});
},
},
Use State and when a user clicks on the button, pricing details are fetched and added in the state. And you can just use the state anywhere in your application like so -
this.$store.state.prices
Let me know if it works, if not we will find some other solution for you!

VueJS: Render dynamic template for component

I have a component on my parent page like so:
Detail.vue
Template:
<feature-list :description="description"></feature-list>
Script:
axios.get(`my/end/point`)
.then(res => {
this.description = res.data.product.description
})
.catch(function (error) {
console.log('error', error)
})
Features.vue
Template:
<component :is="subcomponent" :height="overallHeight" :width="overallWidth" :length="overallLength"></component>
Script:
components: {
subcomponent: {
props: ['overallHeight', 'overallWidth', 'overallLength'],
/* template: this.description */
}
}
Expected return value from this.description:
<el-row :gutter="30">
<el-col :sm="24">
<ul class="dimensions d-flex">
<li class="dimension">
<img src="/length.jpg" alt="">
<h4 class="title">Length</h4>
<p class="base-copy">{{length}}</p>
</li>
<li class="dimension">
<img src="/height.jpg" alt="">
<h4 class="title">Height</h4>
<p class="base-copy">{{height}}</p>
</li>
<li class="dimension">
<img src="/width.jpg" alt="">
<h4 class="title">Width</h4>
<p class="base-copy">{{width}}</p>
</li>
</ul>
</el-col>
</el-row>
How can I send the template to the component? and render the values (lenth, width and height)
Something like this, only difference being, the template comes from an ajax call.
After some digging, I've found a way to solve this, the idea is to pass the template and the props as an object to the is prop.
The code will look like this,
<component
:is="description && { template: `<div>${description}</div>`, props: ['height', 'width', 'length'] }"
:height="overallheight"
:width="overallwidth"
:length="overalllength">
</component>

Vue JS Component reattach or Cache

VueJS component doesn't get cached or atleast reattached after navigation. On refresh or launch everything gets attached and rendered well but after navigating to another page then back. The First Component - Carousel - component in my case doesn't get rendered but the API call is made.
<template>
<div class="rel">
<div id="homeCarousel" class="owl-carousel owl-slider">
<div class="item" v-for="product in featured">
<div class="bg-holder top-area-half" >
<div class="bg-mask-lighten"></div>
<img class="bg-img" v-bind:src="product.feature_image_url">
<div class="hero-caption">
<div class="container">
<h3 class="hero-title">{{product.feature_title}}</h3>
<p class="hero-subtitle">{{product.feature_subtitle}}</p>
<a class="btn btn-white btn-ghost btn-lg hero-btn" href="#">Shop now</a>
</div>
</div>
</div>
</div>
</div>
<div id="hero-slider-nav" class="hero-slider-nav">
<div class="container">
<div class="pull-right"></div>
</div>
</div>
</div>
</template>
<style>
</style>
<script>
export default{
data(){
return{
featured:[]
}
},
ready(){
},
mounted(){
this.getFeaturedProducts();
},
components:{
},
methods: {
getFeaturedProducts: function () {
Vue.http.get('/api/product/filter/featured=1').then(
(response) => {
this.featured = response.body;
}
)
}
}
}
</script>
`
<template>
<div class="global-wrapper clearfix ">
<keep-alive>
<Carousel></Carousel>
</keep-alive>
//The rest of the code which is just importing the Component
I found out what i was doing wrong. I had a separate JS/JQuery file and on the document ready i was initializing an owl carousel by id #('homeCarousel').owlCarousel({}) . What worked was, since i had already bootstrapped owl carousel -> on the mounted lifecycle callback i was now targeting the element and making it an owl carousel.