I may have gone about this completely the wrong way from the beginning so all advise is welcomed.
I am trying to create a basic page with inputs on the right and hints for the inputs on the left and when you focus on the inputs the appropriate hint is highlighted on the left.
There is a JSFiddle here: https://jsfiddle.net/eywraw8t/210693/
This will not work as I do not know how to find the appropriate hint to highlight (and set isHighlighted to false on all the other hints).
I managed to get a working example by adding a highlighted prop on the field object and not using a hint component. However in reality the fields data will come from the database so it won't have a highlighted parameter so a hint component seemed more sensible.
To put my question in simple terms: How can I find the relevant hint component when focused on an input?
JS Fiddle showing functionality without a component: https://jsfiddle.net/as2vxy79/
Broken JS Fiddle trying to use a component: https://jsfiddle.net/eywraw8t/210693/
Here is the JS outside JS Fiddle:
Vue.component('hint', {
template: `
<div class="hint" :class="{'highlight-hint': isHighlighted }">
<slot></slot>
</div>
`,
data() {
return {
isHighlighted: false
}
}
});
new Vue({
el: "#app",
data: {
fields: [
{
'id': 'name',
'hint': 'Put the name here'
},
{
'id': 'description',
'hint': 'Put the description here'
},
{
'id': 'more',
'hint': 'Put more here'
}
]
},
methods: {
onFocus(focusedField) {
// Somehow loop through the hints
// I am aware there is no "hints" property this is an example
this.hints.forEach(function(field) {
field.isHighlighted = (focusedField == field.id)
})
}
}
})
Short answer: you don't need a direct reference to the components displaying the hint because you can solve this problem using reactivity.
Only thing you need to do is add a data field which stores the field id you want to highlight and then conditionally add a class to the hint you want to highlight based on the selected id (or render the components conditionally).
new Vue({
el: "#app",
data: {
highlightedFieldId: '',
fields: [
{
'id': 'name',
'hint': 'Put the name here' },
{
'id': 'description',
'hint': 'Put the description here' },
{
'id': 'more',
'hint': 'Put more here' }
]
},
methods: {
onFocus(focusedFieldId) {
this.highlightedFieldId = focusedFieldId;
}
}
})
Here's an update to your Fiddle.
NOTES:
If you really need direct references you can use the ref directive (this also works in a list of components generated by v-for).
You should probably think about using tooltips for the hints. E.g. using Element UI's Tooltip.
UPDATE:
So, here's a solution using the ref directive to obtain a reference to the highlighted hint component. You can see that I used the field id in :ref but you still get an array from this.$refs[focusedFieldId] since there is a surrounding v-for. Other than that, it's pretty simple.
I also updated the hint component to accept the is-highlighted prop so it can change its class on its own (you previously used a data property for this which does not result in a component update).
Related
HIGHLIGHT: This is a solved problem.
Edit: Solved the problem using #Amaarockz's advice!
I haven't had much experience in CSS variables & complicated :style structures, but turned out they're great!
Original question:
I have a menu built with Vue.js (and Vuetify), data passed in from the backend like:
[
{
id: 13241243,
color: "#123456",
activeColor: "#abcdef",
text: "Asadpyqewri"
},
{
id: 742378104,
color: "#234567",
activeColor: "#bcdefa",
text: "Iudaofqepr"
}
]
Menu looks like:
<v-btn-toggle>
<v-btn v-for="item in items" :key="item.id" :color="item.color">
{{item.text}}
</v-btn>
</v-btn-toggle>
Problem
I want to know, how can I dynamically make the items in a different color when they have :active pseudo-class?
What I've tried:
Write something in "style" attribute of list items:
Failed, as I can't add a selector in <element style="">, only styles.
Use an attribute like "active-color" defined by Vuetify:
Failed, such things don't exist.
Dynamically add colors to the "v--btn-active" class, which Vuetify adds automatically:
Failed, I can't find a way to do this seperately for each button.
Watch when the :active pseudo-class appears, add style in the listener:
Somehow MutationObserver didn't work for me.
getElementsByClassName[0] keeps getting "null". I tried writing that in windows.onload, nothing changed.
One time it returned the correct node, and I was able to watch the class mutation. But I can't reproduce that even though nothing changed in the code.
mounted(){
window.onload = function(){
const targetNodes = document.getElementsByClassName('asdff');
var a = targetNodes.item(0);
//"targetNodes" is a HTMLCollection with 3 elements, but "a" is null.
}
}
Add one different class to every button, and write seperate CSS for them using JavaScript:
Perhaps doable, but code's going to be extremely ugly & difficult to maintain.
Besides, it's hard to overwrite Vuetify's default style outsides <element style>; you have to add !important.
Last two attempts are what I think more hopeful. Is there any way to work through?
Try using pseudo class like
Vue.component('pseudo', {
data() {
return {
msg: 'Hover on me',
}
},
props: {
color: {
type: String,
},
text: {
type: String,
}
},
computed: {
cssAttrs() {
return {
'--color': this.color,
'--text': JSON.stringify(this.text),
}
}
},
template: `<button class="content" :style="cssAttrs">{{msg}}</button>`,
});
var vm = new Vue({
el: '#app',
});
.content {
color: red;
}
.content:focus {
content: var(--text);
color: var(--color);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<pseudo color="blue" text="Changing!!"></pseudo>
</div>
I have stucked with an issue using refinement list widget of algolia.
First of all my resulting data structure is like that:
[
{
objectID: 999,
title: 'some title',
categories: [
{
id: 444,
name: 'some name',
},
{...},
]
}
]
I have that type of structure on my page:
<ais-instant-search
:search-client="searchClient"
:initial-ui-state="{
index_Name: { query: searchedValue },
}"
index-name="index_Name"
>
<ais-index index-name="index_Name">
<ais-configure
:filters="facetsFilters"
:facets="['categories.id']"
:hits-per-page.camel="items"
/>
<ais-refinement-list attribute="categories.id" />
<div> ...Some other widgets nested in divs as ais-search-box, ais-sort-by, etc </div>
</ais-index>
</ais-instant-search>
Within ais-configure I have passed to filters a facetsFilters variable which contains string with such content:
"categories.id:1 OR categories.id:5"
and it works ok, I'm getting results within selected categories,
problems starts, when i try to get refinement-list here:
<ais-refinement-list attribute="categories.id" />
I have an empty list despite that on dashboard this attribute is added as an attributesForFacetings and in ais-configure filters parameters with categories.id in it also works well.
Any suggestions is highly appreciated !
Problem was in Dashboard of Algolia.
When we clicked on 'searchable' instead of 'filter only' radiobutton for chosen attributeForFaceting - everything starts working good.
This is a Vue.js and Vuex related problem.
I'm building an aplication where I show a list of residences (ul -> li -> a) while at the same time showing those illustrations' position in an illustration, solved via SVG (active elements are path and polygon). If it was just the one element I could do show active state using only css, but because there are two active elements at the same time I need an event.
Previously I solved the issue by giving the residence, stored in Vuex, a hasFocus: false value, which I would change to true on mouseenter/focus and back to false on mouseout/focusout. With that I can add/remove a class has-focus to which I add the active state css. I have now redone the datastore to use Vuex ORM, after which I'm seeing worse frame rate drops when carying out the mutation.
Is there a better way of doing this than using a value in a Vuex (ORM) object model?
Some code:
In Vuex:
residences: [
{
id: 1,
hasFocus: false,
[…] // Other values, not relevant to this question
},
{
id: 2,
hasFocus: false
},
…
…
],
In ResidenceItem.vue:
<router-link
[…]
v-bind:class="{
'has-focus': residence.hasFocus === true,
}"
#mouseenter.native.stop="toggleFocus(true)"
#mouseout.native.stop="toggleFocus(false)"
#focus.native.stop="toggleFocus(true)"
#focusout.native.stop="toggleFocus(false)"
[…]
>
// Content
</router-link>
[…]
props: {
id: {
required: true,
},
},
methods: {
toggleFocus(focus) {
Residence.update({
where: this.id,
data: {
hasFocus: focus,
},
});
},
},
why should "hasFocus" be stored in vuex? is there a need to be?
if not, you should move it to ResidenceItem.vue's data().
i think it is a just temporary state on vue.
<router-link
:class="{
'has-focus': focused,
}"
#mouseenter.native.stop="focused = true"
#mouseout.native.stop="focused = false"
#focus.native.stop="focused = true"
#focusout.native.stop="focused = false"
[…]
>
...
data() {
return {
focused: false,
};
},
...
if hasFocus is needed in vuex (which i think it is a bad idea), you should use normal vuex state to store like focusedResidenceId: null.
I can provide more detail explanation if you need. Please let me know if you so.
I'm Vue.js newbie and my task is:
make an ajax call (GET) to server, using RESTful API (Laravel on background)
retrieve a (JSON) list of Form CRUD items in array (like checkbox, input text, textarea...) with their properties (value, checked, custom classes...)
render CRUD form with these form items maybe using Vue's loop
I'm wondering if it could be rendered using components somehow. But I don't know the correct way.
Frankly, I exactly don't know how to solve this problem with Vue.js - rendering items from array and each item has it's own markup and properties (checkbox has it's own, textbox, select, textarea...).
I'm building a web application based on CRUD operations and I'm trying to write universal components. The easiest way is to do a special component with hard-written sub-components for each subpage, but I don't like this way if not needed.
Thank you!
EDIT: I don't have much code yet, but this is where I am...
<script>
// ./components/CrutList.vue
export default {
mounted() {},
data() {
return {
items: []
}
},
props: ['resource'],
methods: {
getItems() {
var resource = this.$resource('api/'+this.resource+'{/id}');
resource.get({}).then(function(items){
if(items.body.status == 'success'){
this.items = items.body.items;
}
}).bind(this);
},
deleteItem(item) {
// perform CRUD operation DELETE
alert('delete action');
}
}
}
</script>
My idea is using CrudList component to CRUD listing...
<crud-list resource="orders">
In laravel I do something like this:
return response()->json([
'status' => 'success',
'items' => [
[
'itemComponent' => 'checkbox',
'props' => [
'checked' => true,
'label' => "Checkbox č.1",
'name' => 'checkbox1'
]
],
[
'itemComponent' => 'checkbox',
'props' => [
'checked' => true,
'label' => "Checkbox č.2",
'name' => 'checkbox2'
]
],
[
'itemComponent' => 'checkbox',
'props' => [
'checked' => true,
'name' => 'checkbox3'
]
],
],
]);
...it's very simplified, but it's just example of what I'm doing.
Now the problem is:
take the 'itemComponent' part from the returned array item (this is in a loop),
if it's a checkbox, take (for example) Checkbox.vue component, fill it with properties ('props' part of the array item)
I read about slots, but it's not what I'm looking for. Is there something I can use for dynamic components?
Check out this jsFiddle working example for dynamic forms:
https://jsfiddle.net/mani04/kr8w4n73/1/
You can do it easily by using a lot of v-ifs for each and every form element type you might get from server. It is a bit cumbersome but I can't find any other way.
In the above example, I have the form structure as follows:
var formItems = [{
input_type: "text",
input_label: "Login",
values: {
value: "your_name#example.com"
}
},
{...},
{...}];
Once you have that data, then it is a matter of iterating through formItems, checking input_type and activating the relevant form control.
Here is how my dynamic form template looks like, for the above input:
<div v-for="formItem in formValues">
<div v-if="formItem.input_type == 'text'">
<input type="text" v-model="formItem.values.value">
</div>
<div v-if="formItem.input_type == 'password'">
<input type="password" v-model="formItem.values.value">
</div>
<div v-if="formItem.input_type == 'checkbox'">
<input type="checkbox" v-model="formItem.values.checked">
{{formItem.values.label}}
</div>
</div>
My jsFiddle example uses form-horizontal from bootstrap, and I am also able to display the labels well. If I put that in the example above, it will get cluttered and will not let you see how it works.
Hope it helps! You can change the formItems data structure to meet your needs, and modify the template accordingly.
I'm struggling to understand how to pass data between components in vue.js. I have read through the docs several times and looked at many vue related questions and tutorials, but I'm still not getting it.
To wrap my head around this, I am hoping for help completing a pretty simple example
display a list of users in one component (done)
send the user data to a new component when a link is clicked (done) - see update at bottom.
edit user data and send it back to original component (haven't gotten this far)
Here is a fiddle, which fails on step two: https://jsfiddle.net/retrogradeMT/d1a8hps0/
I understand that I need to use props to pass data to the new component, but I'm not sure how to functionally do it. How do I bind the data to the new component?
HTML:
<div id="page-content">
<router-view></router-view>
</div>
<template id="userBlock" >
<ul>
<li v-for="user in users">{{user.name}} - <a v-link="{ path: '/new' }"> Show new component</a>
</li>
</ul>
</template>
<template id="newtemp" :name ="{{user.name}}">
<form>
<label>Name: </label><input v-model="name">
<input type="submit" value="Submit">
</form>
</template>
js for main component:
Vue.component('app-page', {
template: '#userBlock',
data: function() {
return{
users: []
}
},
ready: function () {
this.fetchUsers();
},
methods: {
fetchUsers: function(){
var users = [
{
id: 1,
name: 'tom'
},
{
id: 2,
name: 'brian'
},
{
id: 3,
name: 'sam'
},
];
this.$set('users', users);
}
}
})
JS for second component:
Vue.component('newtemp', {
template: '#newtemp',
props: 'name',
data: function() {
return {
name: name,
}
},
})
UPDATE
Ok, I've got the second step figured out. Here is a new fiddle showing the progress: https://jsfiddle.net/retrogradeMT/9pffnmjp/
Because I'm using Vue-router, I don't use props to send the data to a new component. Instead, I need set params on the v-link and then use a transition hook to accept it.
V-link changes see named routes in vue-router docs:
<a v-link="{ name: 'new', params: { name: user.name }}"> Show new component</a>
Then on the component, add data to the route options see transition hooks:
Vue.component('newtemp', {
template: '#newtemp',
route: {
data: function(transition) {
transition.next({
// saving the id which is passed in url
name: transition.to.params.name
});
}
},
data: function() {
return {
name:name,
}
},
})
-------------Following is applicable only to Vue 1 --------------
Passing data can be done in multiple ways. The method depends on the type of use.
If you want to pass data from your html while you add a new component. That is done using props.
<my-component prop-name="value"></my-component>
This prop value will be available to your component only if you add the prop name prop-name to your props attribute.
When data is passed from a component to another component because of some dynamic or static event. That is done by using event dispatchers and broadcasters. So for example if you have a component structure like this:
<my-parent>
<my-child-A></my-child-A>
<my-child-B></my-child-B>
</my-parent>
And you want to send data from <my-child-A> to <my-child-B> then in <my-child-A> you will have to dispatch an event:
this.$dispatch('event_name', data);
This event will travel all the way up the parent chain. And from whichever parent you have a branch toward <my-child-B> you broadcast the event along with the data. So in the parent:
events:{
'event_name' : function(data){
this.$broadcast('event_name', data);
},
Now this broadcast will travel down the child chain. And at whichever child you want to grab the event, in our case <my-child-B> we will add another event:
events: {
'event_name' : function(data){
// Your code.
},
},
The third way to pass data is through parameters in v-links. This method is used when components chains are completely destroyed or in cases when the URI changes. And i can see you already understand them.
Decide what type of data communication you want, and choose appropriately.
The best way to send data from a parent component to a child is using props.
Passing data from parent to child via props
Declare props (array or object) in the child
Pass it to the child via <child :name="variableOnParent">
See demo below:
Vue.component('child-comp', {
props: ['message'], // declare the props
template: '<p>At child-comp, using props in the template: {{ message }}</p>',
mounted: function () {
console.log('The props are also available in JS:', this.message);
}
})
new Vue({
el: '#app',
data: {
variableAtParent: 'DATA FROM PARENT!'
}
})
<script src="https://unpkg.com/vue#2.5.13/dist/vue.min.js"></script>
<div id="app">
<p>At Parent: {{ variableAtParent }}<br>And is reactive (edit it) <input v-model="variableAtParent"></p>
<child-comp :message="variableAtParent"></child-comp>
</div>
I think the issue is here:
<template id="newtemp" :name ="{{user.name}}">
When you prefix the prop with : you are indicating to Vue that it is a variable, not a string. So you don't need the {{}} around user.name. Try:
<template id="newtemp" :name ="user.name">
EDIT-----
The above is true, but the bigger issue here is that when you change the URL and go to a new route, the original component disappears. In order to have the second component edit the parent data, the second component would need to be a child component of the first one, or just a part of the same component.
The above-mentioned responses work well but if you want to pass data between 2 sibling components, then the event bus can also be used.
Check out this blog which would help you understand better.
supppose for 2 components : CompA & CompB having same parent and main.js for setting up main vue app. For passing data from CompA to CompB without involving parent component you can do the following.
in main.js file, declare a separate global Vue instance, that will be event bus.
export const bus = new Vue();
In CompA, where the event is generated : you have to emit the event to bus.
methods: {
somethingHappened (){
bus.$emit('changedSomething', 'new data');
}
}
Now the task is to listen the emitted event, so, in CompB, you can listen like.
created (){
bus.$on('changedSomething', (newData) => {
console.log(newData);
})
}
Advantages:
Less & Clean code.
Parent should not involve in passing down data from 1 child comp to another ( as the number of children grows, it will become hard to maintain )
Follows pub-sub approach.
I've found a way to pass parent data to component scope in Vue, i think it's a little a bit of a hack but maybe this will help you.
1) Reference data in Vue Instance as an external object (data : dataObj)
2) Then in the data return function in the child component just return parentScope = dataObj and voila. Now you cann do things like {{ parentScope.prop }} and will work like a charm.
Good Luck!
I access main properties using $root.
Vue.component("example", {
template: `<div>$root.message</div>`
});
...
<example></example>
A global JS variable (object) can be used to pass data between components. Example: Passing data from Ammlogin.vue to Options.vue. In Ammlogin.vue rspData is set to the response from the server. In Options.vue the response from the server is made available via rspData.
index.html:
<script>
var rspData; // global - transfer data between components
</script>
Ammlogin.vue:
....
export default {
data: function() {return vueData},
methods: {
login: function(event){
event.preventDefault(); // otherwise the page is submitted...
vueData.errortxt = "";
axios.post('http://vueamm...../actions.php', { action: this.$data.action, user: this.$data.user, password: this.$data.password})
.then(function (response) {
vueData.user = '';
vueData.password = '';
// activate v-link via JS click...
// JSON.parse is not needed because it is already an object
if (response.data.result === "ok") {
rspData = response.data; // set global rspData
document.getElementById("loginid").click();
} else {
vueData.errortxt = "Felaktig avändare eller lösenord!"
}
})
.catch(function (error) {
// Wu oh! Something went wrong
vueData.errortxt = error.message;
});
},
....
Options.vue:
<template>
<main-layout>
<p>Alternativ</p>
<p>Resultat: {{rspData.result}}</p>
<p>Meddelande: {{rspData.data}}</p>
<v-link href='/'>Logga ut</v-link>
</main-layout>
</template>
<script>
import MainLayout from '../layouts/Main.vue'
import VLink from '../components/VLink.vue'
var optData = { rspData: rspData}; // rspData is global
export default {
data: function() {return optData},
components: {
MainLayout,
VLink
}
}
</script>