How to render block conditionally using vue.js? - vue.js

var app = new Vue({
el: '#app',
data: {
products:[
{
product_id:'21221312',
product:[
{variation:'paper', price:'12'}
]
},
{
product_id:'2122131212',
product:[
{variation:'ebook', price:'122'}
]
},
{
product_id:'21221312212',
product:[
{variation:'aduio', price:'1322'}
]
},
]
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.15/vue.js"></script>
<div id="app">
<div v-for="(product, index) in products">
<div v-for="variant in product.product">
<p v-if="variant.variation === 'paper'">
{{variant.price}}
</p>
<p v-if="variant.variation==='ebook'">
{{variant.price}}
</p>
<p v-if="variant.variation==='aduio'">
{{variant.price}}
</p>
</div>
</div>
<div>
I am just start learning Vue.js, I have this problem how i can to render variation price conditionally, for example if variation contains paper i want to render only paper not ebook and audio, is this possible with v-if satement?
products:[
{
product_id:'21221312'
variations: [
{
variation:'paper',
price:'44'
},
{
variation:'ebook',
price:'41'
},
{
variation:'audio',
price:'40'
}
],
},
{
product_id:'212213132'
variations: [
{
variation:'paper',
price:'44'
},
{
variation:'ebook',
price:'41'
},
{
variation:'audio',
price:'40'
}
],
},
]

The way you are writing your markup is redundant, whether it be audio, ebook, or paper, it will still just render the price. might as well remove all those v-ifs since they all end up doing the same thing. You can display everything inside the variant and it will display correctly what the product has.
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.15/vue.js"></script>
<div id="app">
<div v-for="(product, index) in products">
<div v-for="variant in product.product">
<p>
Type: {{variant.variation}} | Price: {{variant.price}}
</p>
<p>
</p>
</div>
</div>
<div>
You can check out this JSFiddle of your issue to see how it works and play around with it if you would like

Related

How to reuse vue method for different form inputs

I am making a gaming character creator menu, which has a lot of form inputs that essentialy work the same way, incrementing an attribute up or down by one on button click.
I am fairly new to using Vue and would like to be able to pass the character attribute eg. 'torso' aswell from the form element to my increase() and decrease() methods without to repeat code. Currently I can change by hardcoding in the this.form.heads++ or this.form.heads-- but would like to do something like this.form.val++ with val being which ever form element was clicked.
index.html
<form>
<div class="attr_block">
<div class="attr_row">
<div class="attr-col">
<label class="attr_label">Head Type</label>
</div>
<div class="input-col center">
<div class="left_arrow" #click="decrease()"></div>
<label class="attr_label">Type {{form.heads}}</label>
<div class="right_arrow" #click="increase()"></div>
</div>
</div>
<div class="attr_row">
<div class="attr-col">
<label class="attr_label">Torso Type</label>
</div>
<div class="input-col center">
<div class="left_arrow" #click="decrease()"></div>
<label class="attr_label">Type {{form.torso}}</label>
<div class="right_arrow" #click="increase()"></div>
</div>
</div>
</div>
</form>
app.js (cut down a little to focus on the issue)
const APP = new Vue({
el: '#app',
data: {
step:1,
display: false,
form: {
albedo:'mp_head_mr1_sc08_c0_000_ab',
heads:1,
torse:1,
},
},
methods: {
OpenUI() {
this.display = true
},
CloseUI() {
this.display = false
$.post('https://parks_creator/CloseUI')
},
decrease(){
this.form.heads--;
$.post('https://parks_creator/inputchange', JSON.stringify({
data: this.form
}))
},
increase(){
this.form.heads++;
$.post('https://parks_creator/inputchange', JSON.stringify({
data: this.form
}))
},
prev() {
this.step--;
},
next() {
this.step++;
},
change(){
$.post('https://parks_creator/inputchange', JSON.stringify({
data: this.form
}))
},
},
computed: {},
watch: {
},
})```
You can pass a character attribute to your methods as a parameter.
script:
methods: {
decrease(attribute){
this.form[attribute]--
},
increase(attribute){
this.form[attribute]++
}
}
template
<div #click="increase('heads')" />
<div #click="decrease('heads')" />
<div #click="increase('torso')" />
<div #click="decrease('torso')" />

How to make transition opacity work when element is removed?

Hi I made the following notification component for my vue app where I am looping through errors and success messages from vuex store. I am removing them after 3 seconds from the array. However this means the transition does not gets applied since the element gets removed from the DOM. How can I make that work? Please help me.
<template>
<div
id="toast-container"
class="fixed z-50 top-20 right-3"
>
<div
v-for="(error, index) in errors"
:key="error+index"
:class="`${error ? 'opacity-1 visible' : 'opacity-0 invisible'}
toast toast-error flex items-center transition-opacity`"
>
<img
svg-inline
src="#/assets/icons/alert_triangle.svg"
alt="alert icon"
>
<div class="pl-2">
<div class="toast-title">
Der er sket en fejl!
</div>
<div class="toast-message">
{{ error }}
</div>
</div>
</div>
<div
v-for="(message, index) in successMessages"
:key="message+index"
:class="`${message ? 'opacity-1 visible' : 'opacity-0 invisible'}
toast toast-success flex items-center`"
>
<img
svg-inline
src="#/assets/icons/shield_check.svg"
alt="alert icon"
>
<div class="pl-2">
<div class="toast-title">
Succes
</div>
<div class="toast-message">
{{ message }}
</div>
</div>
</div>
</div>
</template>
<script>
export default {
name: 'Notifications',
computed: {
errors() {
return this.$store.state.global.errors
},
successMessages() {
return this.$store.state.global.successMessages
},
},
watch: {
errors: {
handler() {
setTimeout(() => {
this.removeError(0)
}, 3000)
},
deep: true,
},
successMessages: {
handler() {
setTimeout(() => {
this.removeSuccessMessage(0)
}, 3000)
},
deep: true,
},
},
methods: {
removeError(index) {
this.$store.commit('removeError', index)
},
removeSuccessMessage(index) {
this.$store.commit('removeSuccessMessage', index)
},
},
}
</script>
Have a look at https://vuejs.org/guide/built-ins/transition-group.html which is designed for this exact use case. Basically wrapping the whole v-for block with <TransitionGroup> and defining proper CSS classes is all you need to do, <TransitionGroup> will take care of animating the element and removal from DOM after animation is done, you just need to add/remove items from state.

Images are not showing in <el-carousel></el-carousel> of Element-ui

I'm trying to put some images in Element-ui of Vue Framework but the images don't appear on the page.. I'm really new in Vue Framework. Anyone please help me to solve it.
<template>
<div>
<el-carousel indicator-position="outside">
<el-carousel-item v-for="item in img" :key="item">
<img :src="item" />
</el-carousel-item>
</el-carousel>
</div>
export default {
name: "Home",
data() {
return {
img: [
require("#/assets/homepage.png"),
require("#/assets/honor.jpg"),
require("#/assets/homepage.png"),
require("#/assets/huaweip30.jpg"),
],
};
},
Thanks
var Main = {
data() {
return {
carouselImages: [
'https://www.gstatic.com/webp/gallery3/1.png',
'https://www.gstatic.com/webp/gallery3/2.png',
],
};
},
};
var Ctor = Vue.extend(Main)
new Ctor().$mount('#app')
#import url("//unpkg.com/element-ui#2.13.2/lib/theme-chalk/index.css");
<script src="//unpkg.com/vue/dist/vue.js"></script>
<script src="//unpkg.com/element-ui#2.13.2/lib/index.js"></script>
<div id="app">
<template>
<el-carousel :interval="6000" height="200px">
<el-carousel-item v-for="item in carouselImages" :key="item">
<img :src="item" class="image">
</el-carousel-item>
</el-carousel>
</template>
</div>

Apply v-focus to the first input field on a page

I've a Vue component in which I'm trying to autofocus the first field using v-focus. But my problem is, I've dynamic components that will be included at the top of the page. So in that case how can I apply autofocus to dynamically included component?
They key is to set ref on all your inputs to the same string like this:
<input type="text" ref="myInputs"/>
Then you will have access to an array called this.$refs.myInputs inside an event handler.
So you just need to do
this.$refs.myInputs[0].focus();
new Vue({
el: "#app",
mounted() {
this.$refs.myInputs[0].focus();
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.min.js"></script>
<div id="app">
<div>
<div v-for="index in 3" :key="index">
<input ref="myInputs" type="text" />
</div>
</div>
</div>
It's hard to tell how you're adding the input(s) to the DOM, without any pseudo code from you, but this is one way to do it..
[CodePen mirror]
new Vue({
el: "#app",
data: {
inputs: ["firstName", "lastName"]
},
watch: {
inputs() {
this.$nextTick(() => {
this.focusFirstInput();
});
}
},
methods: {
focusFirstInput() {
let first = this.inputs[0];
let firstInput = this.$refs[first][0];
firstInput.focus();
},
handleClick() {
this.inputs.push("newInput");
}
},
mounted() {
this.focusFirstInput();
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.min.js"></script>
<div id="app">
<div>
<div v-for="(input, index) in inputs" :key="index">
<input :ref="input" type="text" />
</div>
<div>
<button type="button" #click="handleClick">Click to add input</button>
</div>
</div>
</div>
I found this answer on Laracast and it worked for me. All I did was insert the code below in my dynamic form field.
this.$nextTick(() => {
let index = this.items.length - 1;
let input = this.$refs.title[index];
input.focus();
});
HTML
<div id="app">
<ul v-for="item in items">
<li>
<input :ref="'title'" v-model="item.title">
</li>
</ul>
<button v-on:click="addItem">Add Item</button>
</div>
JS
let app = new Vue({
el: '#app',
data: {
items: [
{title: 'Apple'},
{title: 'Orange'},
]
},
methods: {
addItem(){
this.items.push({title: "Pineapple"});
this.$nextTick(() => {
let index = this.items.length - 1;
let input = this.$refs.title[index];
input.focus();
});
}
}
});
Note: make sure to add :ref="'title'" into your dynamic form field.
Credits to the original author of the solution.

How to use query parameter in Vue search box?

I have a page with a search box on it using Vue. What I want to do is this: when a user comes from another page with a parameter in the URL (e.g., myurl.com/?windows), I capture the parameter and populate the search field to run the search on that string when the page loads. If there's no parameter, nothing happens.
I'm capturing the string from the URL with JavaScript, but don't see how to get it in the input to run the search.... I created a method but don't see how to apply it.
<div id="app">
<input type="text" v-model="search" placeholder="Search Articles" />
<div v-for="article in filteredArticles" v-bind:key="article.id" class="container-fluid to-edges section1">
<div class="row">
<div class="col-md-4 col-sm-12 section0">
<div class="section0">
<a v-bind:href="article.url" v-bind:title="toUppercase(article.title)">
<img class="resp-img expand section0"
v-bind:src="article.src"
v-bind:alt="article.alt"/>
</a>
</div>
<div>
<h3 class="title-sec">{{ article.title }}</h3>
<p>{{ article.description }}</p>
</div>
</div>
</div>
</div>
</div>
<script type="text/javascript">
var pgURL = window.location.href;
var newURL = pgURL.split("?")[1];
console.log(newURL);
</script>
// Filters
Vue.filter('to-uppercase', function(value){
return value.toUpperCase();
});
new Vue({
el: "#app",
data: {
articles: [
{ id: 1, title: 'Trend Alert: Black Windows', category: 'Windows', description: 'Timeless, elegant, and universally flattering, black is an excellent color to add to any wardrobe – or any window. Get in the black with this chic design trend.', src: 'http://i1.adis.ws/i/stock/Trending_Polaroid_Black_Windows_2018_1?$trending-mobile$', url: '/{StorefrontContextRoot}/s/trending/trend-alert-black-windows', alt: 'Pantone Colors image' },
{ id: 2, title: 'Benefits of a Pass-Through Window', category: 'Windows', description: 'Whether you’re adding a pass-through window in order to enjoy an al fresco aperitif or for easier access to appetizers in the kitchen, we’re big fans of bringing the outdoors in.', src: 'http://i1.adis.ws/i/stock/polaroid_benefitsofapassthroughwindow655x536?$trending-mobile$', url: '/{StorefrontContextRoot}/s/trending/kitchen-pass-through-bar-window', alt: 'Benefits of a Pass-Through Window image' }, etc....
],
search: ''
},
methods: {
toUppercase: function(title){
return title.toUpperCase();
},
urlSearch: function(newURL) {
if (newURL) {
return this.search = newURL;
}
}
},
computed: {
filteredArticles: function() {
// returning updated array based on search term
return this.articles.filter((article) => {
return article.category.match(new RegExp(this.search, "i"));
});
}
}
})
You can call the urlSearch method during the mounted hook:
mounted() {
this.urlSearch(newURL)
},
methods: {
urlSearch(url) {
return this.search = url
}
},