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Am having issue implementing the javascript code with vue

Am very new to vuejs.am trying to replicate the javascript with vue. where a user can toggle button. I have a list of buttons and I would like to toggle the active class but remove the active class from all other buttons.. Is there a better way of writtting the function without the querySelector? Am really stuck..
<template>
<div #click="selectItem" class="menu-tabs">
<button type="btn" class="menu-tab-item active" data-target="#remis-transfer"> Transfer
</button>
<button type="btn" class="menu-tab-item text-muted" data-target="#bank-transfer">
Transfer Money
</button>
<button type="btn" class="menu-tab-item text-muted" data-target="#fueling">
Fueling
</button>
</div>
</template>
<script>
export default {
methods: {
selectItem(e) {
if (e.target.classList.contains("menu-tab-item") && !e.target.classList.contains("active")) {
const target = e.target.getAttribute("data-target")
menuTabs.querySelector(".active").classList.remove("active");
e.target.classList.add("active");
const menuSection = document.querySelector(".menu-section");
menuSection.querySelector(".menu-tab-content.active").classList.remove("active");
menuSection.querySelector(target).classList.add('active');
}
}
}
}
</script>

Look at the code
var Main = {
data() {
return {
active: 0,
buttonList: [
{
text: "Transfer",
target: "#remis-transfer",
},
{
text: "Transfer Money",
target: "#bank-transfer",
},
{
text: "Fueling",
target: "#fueling",
},
],
};
},
methods: {
selectItem(i) {
this.active = i;
},
},
};
var Ctor = Vue.extend(Main)
new Ctor().$mount('#app')
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.9/vue.js"></script>
<div id="app">
<div class="menu-tabs">
<button
type="btn"
class="menu-tab-item"
v-for="(item, index) in buttonList"
:class="[{ active: active == index }, { 'text-muted': active != index }]"
:data-target="item.target"
:key="index"
#click="selectItem(index)"
>
{{ item.text }}
</button>
</div>
</div>

You can simply define some states like:
data() {
return {
myActiveClass: 'active',
myMutedClass: 'text-muted'
}
},
and pass this myActiveClass and myMutedClass states to your elements like this:
class=menu-tab-item ${myMutedClass} ${myActiveClass}
with this approach, you can quickly achieve what you want. So when you want an element to not be active, in your function you can make myActiveClass = '', or if you want the text to lose muted class you can say myMutedClass = '' .
Just make sure to play with states in the way you want.

Vue js show hide element on click

I am new in vue js. I want to show hide elements on click.
So that What I can do -
make a property in data object like
isHidden: false
and add a mehtod like
showHide(){
return this.isHidden = !this.isHidden;
}
And bind the showHide method on click event like
<li #click="showHide">Some text</a>
But the problem is- if there are several list items binding the same click event,
all lists will be shown on click, or all will hide. But I want the
target element will only show or hide by click.
How can I do this, please?

You can use some data to determine what element you want show/hide. For example: id, index of each element
<button v-for="(i, ind) in listElement" #click="toggleElement(ind)" :key="ind">
Toggle {{ i }}
</button>
<p v-for="(i, ind) in listElementShow" :key="ind">
Element: {{ i }}
</p>
Logic:
data() {
return {
listElement: [ { name: 1, isShow: true}, { name: 2, isShow: true}],
}
},
computed: {
listElementShow() {
return this.listElement.filter(e => e.isShow);
}
}
methods: {
toggleElement(index) {
this.listElement[index].isShow = !this.listElement[index].isShow;
}
}

You can do something like this:
<template>
<ul class="list-with-hidden-items">
<li
v-for="item in list"
:key="item.id"
#click="showHide(item.id)"
>
{{ item.text }}
</li>
</ul>
</template>
<script>
export default {
data: () => ({
hidden: {}
}),
methods: {
showHide(id) {
this.$set(this.hidden, id, !this.hidden[id]);
}
}
}
</script>
and then you can render where you want your item to be shown like this:
<div v-if="!this.hidden.item1">I am shown because of item1 is not hidden</div>

To elaborate on some of these answers, you want to keep track of what's hidden and not hidden in your data object using a isHidden flag or similar.
Then when you loop through your object using v-for, conditionally set the isHidden property for the current item when it's clicked.
new Vue({
el: "#app",
data: {
itemList: [{
"id": 1,
"text": "first item",
"isHidden": false
},
{
"id": 2,
"text": "second item",
"isHidden": true,
},
{
"id": 3,
"text": "third item",
"isHidden": false,
},
],
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<ul>
<li v-for="item in itemList" :key="item.id">
<button #click="item.isHidden = !item.isHidden">
<span v-if="item.isHidden">Show</span>
<span v-else>Hide</span>
</button>
<span v-if="!item.isHidden">{{ item.text }}</span>
</li>
</ul>
</div>

You can use a dynamically bound classObject to do such a thing.
See Class and Style Bindings
Sandbox
<template>
<div #click="showHide()" :class="{ isHidden: isHidden }">
<p>This is a thing</p>
</div>
</template>
<script>
export default {
name: "HelloWorld",
data() {
return {
isHidden: false,
};
},
methods: {
showHide() {
this.isHidden = !this.isHidden;
},
},
};
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.isHidden {
background-color: grey;
}
div {
background-color: #fff;
}
</style>

Vue.js - Computed property not updating - child component

I've created a simple component named DefaultButton.
It bases on properties, that are being set up whenever this component is being created.
The point is that after mounting it, It does not react on changes connected with "defaultbutton", that is an object located in properties
<template>
<button :class="buttonClass" v-if="isActive" #click="$emit('buttonAction', defaultbutton.id)" >
{{ this.defaultbutton.text }}
</button>
<button :class="buttonClass" v-else disabled="disabled">
{{ this.defaultbutton.text }}
</button>
</template>
<script>
export default {
name: "defaultbutton",
props: {
defaultbutton: Object
},
computed: {
buttonClass() {
return `b41ngt ${this.defaultbutton.state}`;
},
isActive() {
return (this.defaultbutton.state === "BUTTON_ACTIVE" || this.defaultbutton.state === "BUTTON_ACTIVE_NOT_CHOSEN");
}
}
};
</script>
Having following component as a parent one:
<template>
<div v-if="state_items.length == 2" class="ui placeholder segment">
{{ this.state_items[0].state }}
{{ this.state_items[1].state }}
{{ this.current_active_state }}
<div class="ui two column very relaxed stackable grid">
<div class="column">
<default-button :defaultbutton="state_items[0]" #buttonAction="changecurrentstate(0)"/>
</div>
<div class="middle aligned column">
<default-button :defaultbutton="state_items[1]" #buttonAction="changecurrentstate(1)"/>
</div>
</div>
<div class="ui vertical divider">
Or
</div>
</div>
</template>
<script type="text/javascript">
import DefaultButton from '../Button/DefaultButton'
export default {
name: 'changestatebox',
data() {
return {
current_active_state: 1
}
},
props: {
state_items: []
},
components: {
DefaultButton
},
methods: {
changecurrentstate: function(index) {
if(this.current_active_state != index) {
this.state_items[this.current_active_state].state = 'BUTTON_ACTIVE_NOT_CHOSEN';
this.state_items[index].state = 'BUTTON_ACTIVE';
this.current_active_state = index;
}
},
},
mounted: function () {
this.state_items[0].state = 'BUTTON_ACTIVE';
this.state_items[1].state = 'BUTTON_ACTIVE_NOT_CHOSEN';
}
}
</script>
It clearly shows, using:
{{ this.state_items[0].state }}
{{ this.state_items[1].state }}
{{ this.current_active_state }}
that the state of these items are being changed, but I am unable to see any results on the generated "DefaultButtons". Classes of objects included in these components are not being changed.
#edit
I've completely changed the way of delivering the data.
Due to this change, I've abandoned the usage of an array; instead I've used two completely not related object.
The result is the same - class of the child component's object is not being
DefaulButton.vue:
<template>
<button :class="buttonClass" v-if="isActive" #click="$emit('buttonAction', defaultbutton.id)" >
{{ this.defaultbutton.text }}
</button>
<button :class="buttonClass" v-else disabled="disabled">
{{ this.defaultbutton.text }}
</button>
</template>
<style lang="scss">
import './DefaultButton.css';
</style>
<script>
export default {
name: "defaultbutton",
props: {
defaultbutton: {
type: Object,
default: () => ({
id: '',
text: '',
state: '',
})
}
},
computed: {
buttonClass() {
return `b41ngt ${this.defaultbutton.state}`;
},
isActive() {
return (this.defaultbutton.state === "BUTTON_ACTIVE" ||
this.defaultbutton.state === "BUTTON_ACTIVE_NOT_CHOSEN");
}
}
};
</script>
ChangeStateBox.vue:
<template>
<div class="ui placeholder segment">
{{ this.state_first.state }}
{{ this.state_second.state }}
{{ this.current_active_state }}
<div class="ui two column very relaxed stackable grid">
<div class="column">
<default-button :defaultbutton="state_first" #buttonAction="changecurrentstate(0)"/>
</div>
<div class="middle aligned column">
<default-button :defaultbutton="state_second" #buttonAction="changecurrentstate(1)"/>
</div>
</div>
<div class="ui vertical divider">
Or
</div>
</div>
</template>
<script type="text/javascript">
import DefaultButton from '../Button/DefaultButton'
export default {
name: 'changestatebox',
data() {
return {
current_active_state: 1
}
},
props: {
state_first: {
type: Object,
default: () => ({
id: '',
text: ''
})
},
state_second: {
type: Object,
default: () => ({
id: '',
text: ''
})
},
},
components: {
DefaultButton
},
methods: {
changecurrentstate: function(index) {
if(this.current_active_state != index) {
if(this.current_active_state == 1){
this.$set(this.state_first, 'state', "BUTTON_ACTIVE_NOT_CHOSEN");
this.$set(this.state_second, 'state', "BUTTON_ACTIVE");
} else {
this.$set(this.state_first, 'state', "BUTTON_ACTIVE");
this.$set(this.state_second, 'state', "BUTTON_ACTIVE_NOT_CHOSEN");
}
this.current_active_state = index;
}
},
},
created: function () {
this.state_first.state = 'BUTTON_ACTIVE';
this.state_second.state = 'BUTTON_ACTIVE_NOT_CHOSEN';
}
}
</script>

You're declaring props wrong. It is either an array of prop names or it is an object with one entry for each prop declaring its type, or it is an object with one entry for each prop declaring multiple properties.
You have
props: {
state_items: []
},
but to supply a default it should be
props: {
state_items: {
type: Array,
default: []
}
},
But your problem is most likely that you're mutating state_items in such a way that Vue can't react to the change

Your main problem is the way you are changing the button state, according with Array change detection vue can't detect mutations by indexing.
Due to limitations in JavaScript, Vue cannot detect the following
changes to an array:
When you directly set an item with the index, e.g.
vm.items[indexOfItem] = newValue When you modify the length of the
array, e.g. vm.items.length = newLength

In case someone will be having the same issue:
#Roy J as well as #DobleL were right.
The reason behind this issue was related with the wrong initialization of state objects.
According to the documentation:
Vue cannot detect property addition or deletion.
Since Vue performs the getter/setter conversion process during instance
initialization, a property must be present in the
data object in order for Vue to convert it and make it reactive.
Before reading this sentence, I used to start with following objects as an initial data:
var local_state_first = {
id: '1',
text: 'Realized',
};
var local_state_second = {
id: '2',
text: 'Active'
};
and the correct version of it looks like this:
var local_state_first = {
id: '1',
text: 'Realized',
state: 'BUTTON_ACTIVE'
};
var local_state_second = {
id: '2',
text: 'Active',
state: 'BUTTON_ACTIVE'
};
whereas declaring the main component as:
<change-state-box :state_first="local_state_first" :state_second="local_state_second" #buttonAction="onbuttonAction"/>
Rest of the code remains the same ( take a look at #edit mark in my main post )

Click-and-edit text input with Vue

I'm looking for a click-and-edit Vue component.
I've found a fiddle and made some edits. It works like this:
The fiddle is here.
The problem: I need an additional click to make the input focused. How can I make it focused automatically?
The code from the fiddle. HTML:
<div id="app">
Click the values to edit!
<ul class="todo-list">
<li v-for = "todo in todos">
<input v-if = "todo.edit" v-model = "todo.title"
#blur= "todo.edit = false; $emit('update')"
#keyup.enter = "todo.edit=false; $emit('update')">
<div v-else>
<label #click = "todo.edit = true;"> {{todo.title}} </label>
</div>
</li>
</ul>
</div>
JS:
new Vue({
el: '#app',
data: {
todos: [{'title':'one value','edit':false},
{'title':'one value','edit':false},
{'title':'otro titulo','edit':false}],
editedTodo: null,
message: 'Hello Vue.js!'
},
methods: {
editTodo: function(todo) {
this.editedTodo = todo;
},
}
})

You can use a directive, for example
JS
new Vue({
el: '#app',
data: {
todos: [
{ title: 'one value', edit: false },
{ title: 'one value', edit: false },
{ title: 'otro titulo', edit: false }
],
editedTodo: null,
message: 'Hello Vue.js!'
},
methods: {
editTodo: function (todo) {
this.editedTodo = todo
}
},
directives: {
focus: {
inserted (el) {
el.focus()
}
}
}
})
HTML
<div id="app">
Click the values to edit!
<ul class="todo-list">
<li v-for="todo in todos">
<input
v-if="todo.edit"
v-model="todo.title"
#blur="todo.edit = false; $emit('update')"
#keyup.enter="todo.edit=false; $emit('update')"
v-focus
>
<div v-else>
<label #click="todo.edit = true;"> {{todo.title}} </label>
</div>
</li>
</ul>
</div>
You can find more info here
https://v2.vuejs.org/v2/guide/custom-directive.html

With #AitorDB's help I have written a Vue component for this, I call it Click-to-Edit. It is ready to use, so I'm posting it.
What it does:
Supports v-model
Saves changes on clicking elsewhere and on pressing Enter
ClickToEdit.vue: (vue 2.x)
<template>
<div>
<input type="text"
v-if="edit"
:value="valueLocal"
#blur.native="valueLocal = $event.target.value; edit = false; $emit('input', valueLocal);"
#keyup.enter.native="valueLocal = $event.target.value; edit = false; $emit('input', valueLocal);"
v-focus=""
/>
<p v-else="" #click="edit = true;">
{{valueLocal}}
</p>
</div>
</template>
<script>
export default {
props: ['value'],
data () {
return {
edit: false,
valueLocal: this.value
}
},
watch: {
value: function() {
this.valueLocal = this.value;
}
},
directives: {
focus: {
inserted (el) {
el.focus()
}
}
}
}
</script>
Edit for 3.x: [Breaking changes between 2.x and 3.x]
remove .native from the event handlers
change the focus hook to mounted as described in Custom Directives 3.x.

Built on #Masen Furer's work. I added some protection to handle when a user deletes all of the data. There is probably a way to accomplish this using "update" but I couldn't get it working.
I also added the ability to hit escape and abandon any changes.
<template>
<span>
<input type="text"
v-if="edit"
:value="valueLocal"
#blur="save($event);"
#keyup.enter="save($event);"
#keyup.esc="esc($event);"
v-focus=""/>
<span v-else #click="edit = true;">
{{valueLocal}}
</span>
</span>
</template>
<script>
export default {
props: ['value'],
data () {
return {
edit: false,
valueLocal: this.value,
oldValue: (' ' + this.value).slice(1)
}
},
methods: {
save(event){
if(event.target.value){
this.valueLocal = event.target.value;
this.edit = false;
this.$emit('input', this.valueLocal);
}
},
esc(event){
this.valueLocal = this.oldValue;
event.target.value = this.oldValue;
this.edit = false;
this.$emit('input', this.valueLocal);
}
},
watch: {
value: function() {
this.valueLocal = this.value;
}
},
directives: {
focus: {
inserted (el) {
el.focus()
}
}
}
}
</script>

How open first tab with vuejs?

How do I open the first tab with VueJS? I have made two components but I don't know how to open the first tab automatically. This is what I've tried, but it doesn't work:
In mounted when i do console.log(this.tabs) return only 0 but before i do this.tabs = this.$children
Tabs.vue
<template>
<div>
<div class="tabs-header">
<ul>
<li v-for="tab in tabs" :key="tab.id" :class="{'is-active' : tab.isActive}">
<a :href="tab.href" #click="selectTab(tab)">{{ tab.name }}</a>
</li>
</ul>
</div>
<div class="content">
<slot></slot>
</div>
</div>
</template>
<script>
export default {
name: "Tabs",
data: function(){
return { tabs: null };
},
created: function() {
this.tabs = this.$children;
//this.tabs[0].isActive = true;
},
methods: {
selectTab (selectedTab){
this.tabs.forEach(tab => {
tab.isActive = (tab.href == selectedTab.href);
});
}
}
}
</script>
This is my second components $children
Tab.vue
<template>
<div v-show="isActive">
<slot></slot>
</div>
</template>
<script>
export default {
name: "Tabs",
props: {
name: { require: true },
selected: { default: false }
},
data() {
return { isActive: false }
},
computed: {
href() {
return '#' + this.name.toLowerCase().replace(/ /g,'-');
}
},
mounted() {
this.isActive = this.selected;
},
methods: {
select(){
this.isActive = true;
}
}
}
</script>
This line doesn't work:
//this.tabs[0].isActive = true;

I copy pasted the code from laracasts.com/series/learn-vue-2-step-by-step/episodes/11 and the first tab is opened by default.
It is the case because in the html, you have :selected=true set on the first tab.
If you want to open the second tab by default, move :selected=true to the second tab, like this : https://jsfiddle.net/ahp3zzte/1/
If you want to change the default tab dynamically, remove :selected=true from the html and call the selectTab method in the js. Also note that to do this, you need to use mounted instead of created. Check this other fiddle : https://jsfiddle.net/0402y2ew/