Vue.js has a built-in directive called v-for which is used to literate over list.
HTML code
<ul id="example-1">
<li v-for="item in items">
{{ item.message }}
</li>
</ul>
Script code
var example1 = new Vue({
el: '#example-1',
data: {
items: [
{ message: 'Foo' },
{ message: 'Bar' }
]
}
})
Here, by using the v-for directive, the elements in items array are returned as variables named item. Here, the variables returned by this v-for directive, can be used in the html DOM. How do I create such a custom directive which returns a variable to the html DOM?
Note: I did search for v-for directives source code in the source code of vuejs, but could not find. Please help me to get this as I am very new to vuejs. Thank you.
Edit:
What I currently have?
There are 3 similar input groups for inputting 'First Name', 'Last Name' and 'Address' respectively. Each input field has label, state, disabled, value, and max properties which are stored in a inputOptions array.
<!-- HMTL -->
<b-input-group :prepend="inputOptions.firstName.label">
<b-form-input
:state="inputOptions.firstName.state"
v-model="inputOptions.firstName.value"
:disabled="inputOptions.firstName.disabled"
:maxlength="inputOptions.firstName.max"
></b-form-input>
</b-input-group>
<b-input-group :prepend="inputOptions.lastName.label">
<b-form-input
:state="inputOptions.lastName.state"
v-model="inputOptions.lastName.value"
:disabled="inputOptions.lastName.disabled"
:maxlength="inputOptions.lastName.max"
></b-form-input>
</b-input-group>
<b-input-group :prepend="inputOptions.address.label">
<b-form-input
:state="inputOptions.address.state"
v-model="inputOptions.address.value"
:disabled="inputOptions.address.disabled"
:maxlength="inputOptions.address.max"
></b-form-input>
</b-input-group>
//Script
inputOptions: {
firstName: {
label: 'First Name',
state: true,
value: 'Foo',
disabled: true,
max: 45
},
lastName: {
label: 'Last Name',
state: true,
value: 'Bar',
disabled: true,
max: 45
},
address: {
label: 'Address',
state: false,
value: 'Foo, Bar.',
disabled: true,
max: 255
},
}
What I needed to achieve
For each input-group field, it is needed to provide the property names one by one. Assume that I have created a vue directive called mydirective and code is simplified as follows.
<!-- HMTL -->
<b-input-group v-mydirective="inputOptions.firstName as myProperty" :prepend="myProperty.label">
<b-form-input
:state="myProperty.state"
v-model="myProperty.value"
:disabled="myProperty.disabled"
:maxlength="myProperty.max"
></b-form-input>
</b-input-group>
<b-input-group v-mydirective="inputOptions.lastName as myProperty" :prepend="myProperty.label">
<b-form-input
:state="myProperty.state"
v-model="myProperty.value"
:disabled="myProperty.disabled"
:maxlength="myProperty.max"
></b-form-input>
</b-input-group>
<b-input-group v-mydirective="inputOptions.address as myProperty" :prepend="myProperty.label">
<b-form-input
:state="myProperty.state"
v-model="myProperty.value"
:disabled="myProperty.disabled"
:maxlength="myProperty.max"
></b-form-input>
</b-input-group>
//Script
inputOptions: {
firstName: {
label: 'First Name',
state: true,
value: 'Foo',
disabled: true,
max: 45
},
lastName: {
label: 'Last Name',
state: true,
value: 'Bar',
disabled: true,
max: 45
},
address: {
label: 'Address',
state: false,
value: 'Foo, Bar.',
disabled: true,
max: 255
},
}
HTML
In your template, iterate over the multiple inputOptions using v-for like:
<div id="app">
<b-input-group v-for="option in inputOptions" :key="option.label" :option="option" />
</div>
SCRIPT
Create custom components for the group, input, and label, like:
Vue.component('b-label', {
props: ['label'],
template: '<div>{{ label }}</div>'
})
Vue.component('b-form-input', {
props: ['state', 'value', 'disabled', 'maxlength'],
template: '<input type="text" :value="value" />'
})
Vue.component('b-input-group', {
props: ['option'],
template:
`<div>
<b-label :label="option.label" />
<b-form-input
:state="option.state"
v-model="option.value"
:disabled="option.disabled"
:maxlength="option.max" />
</div>`
})
FIDDLE
Here is a demo on JSFiddle
This is a basic example of how to use components. Whatever transformations you need to do to the strings can be done in the associated components, via computed properties or methods. You can see a demo by clicking the link where I use a computed property to transform the labels into lowercase. That should be enough to get you going.
Related
I have a BootstrapVue table which looks like this;
When you hover your mouse on the First Name column, the tooltip Tooltip for First name will appear. The checkboxes at the top will cause the corresponding table columns to appear/disappear.
Here's the description of the bug I encounter.
I uncheck First Name checkbox. Column First Name disappears. Now, I recheck the First Name checkbox. Column First Name reappears again. This is fine. However, the tooltip no longer works when I hover my mouse on the First Name column.
Here's the complete code in a single HTML file.
<link href="https://unpkg.com/bootstrap#4.4.1/dist/css/bootstrap.min.css" rel="stylesheet"/>
<link href="https://unpkg.com/bootstrap-vue#2.2.2/dist/bootstrap-vue.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.js"></script>
<script src="https://unpkg.com/bootstrap-vue#2.2.2/dist/bootstrap-vue.min.js"></script>
<div id='app'>
<b-checkbox
:disabled="visibleFields.length == 1 && field.visible"
v-for="field in showFields"
:key="field.key"
v-model="field.visible"
inline
>
{{ field.label }}
</b-checkbox>
<b-table :items="items" :fields="visibleFields" bordered>
</b-table>
<b-tooltip target="HeaderFirst" triggers="hover" container="HeaderFirst">
Tooltip for First name<br>
</b-tooltip>
</div>
<script>
new Vue({
el: '#app',
computed: {
visibleFields() {
return this.fields.filter(field => field.visible)
},
showFields() {
return this.fields.filter(field => field.key.includes('first') || field.key.includes('last'))
}
},
data: dataInit,
})
function dataInit() {
let init_data = {};
init_data.fields = [
{ key: 'id', label: 'ID', visible: true },
{ key: 'first', label: 'First Name', visible: true,
thAttr: {
id: "HeaderFirst"
},
},
{ key: 'last', label: 'Last Name', visible: true },
{ key: 'age', label: 'Age', visible: true },
];
init_data.items = [
{ id: 1, first: 'Mike', last: 'Kristensen', age: 16 },
{ id: 2, first: 'Peter', last: 'Madsen', age: 52 },
{ id: 3, first: 'Mads', last: 'Mikkelsen', age: 76 },
{ id: 4, first: 'Mikkel', last: 'Hansen', age: 34 },
];
return init_data;
}
</script>
I am using vue v2.6, BootstrapVue.
The <b-tooltip>'s target must exist in the DOM upon mounting. It does not dynamically attach a new tooltip to newly created elements in the DOM.
The first run of your code shows a tooltip because <b-table> initially contains the #HeaderFirst element. When you uncheck the First Name box, the existing elements in <b-table> are replaced with new elements via the computed property. The elements removed from the DOM include the one that <b-tooltip> initially attached a tooltip to, and no new tooltip is generated after <b-table> was updated.
Solution
One solution is to render <b-tooltip> only when the target element is visible:
Create a computed prop that determines whether the #HeaderFirst field is visible.
Conditionally render <b-tooltip> based on that computed prop.
new Vue({
computed: { 1️⃣
firstNameHeaderVisible() {
return this.fields.find(field => field.thAttr?.id === 'HeaderFirst')?.visible
}
},
⋮
})
2️⃣
<b-tooltip target="HeaderFirst" v-if="firstNameHeaderVisible">
demo
On disabled elements event hover is not working. You need to wrap element by other e.g. div where you set up tooltip and then it should work well
I am beginner in vue and web developing. I make my app with Laravel and Vue.
I have this code:
created: function () {
let self = this;
self.setActive('tab1');
axios.get(this.$apiAdress + '/api/tasks/create?token=' + localStorage.getItem("api_token"))
.then(function (response) {
self.documentDircionary = response.data.documentDircionary;
self.selectedDocumentDircionary = response.data.selectedDocumentDircionary;
}).catch(function (error) {
console.log(error);
self.$router.push({path: '/login'});
});
<template v-for="(option) in documentDircionary">
<div class="form-group form-row" :key="option.name">
<CCol sm="12">
<input type="checkbox" name="selectedDocuments[]" :id="option.value" /> {{ option.label }}
</CCol>
</div>
</template>
This code show me inputs - and it's work fine.
I have problem with set selected attribute for selected checkbox.
In array selectedDocumentDircionary results from api:
"selectedProducts": [1,2,43]
How can I set checked for only this checkbox, witch selectedProducts?
Please help me
You can use :checked attribute to marked the checkbox checked as per the selectedProducts you have.
Working Demo :
const app = new Vue({
el: '#app',
data() {
return {
selectedProducts: [1, 2, 43],
documentDircionary: [{
name: 'checkbox1',
value: 1,
label: 'Checkbox 1'
}, {
name: 'checkbox2',
value: 2,
label: 'Checkbox 2'
}, {
name: 'checkbox3',
value: 3,
label: 'Checkbox 3'
}, {
name: 'checkbox4',
value: 4,
label: 'Checkbox 4'
}, {
name: 'checkbox43',
value: 43,
label: 'Checkbox 43'
}]
}
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.4.0/vue.js"></script>
<div id="app">
<template v-for="option in documentDircionary">
<div :key="option.name">
<input type="checkbox" name="selectedDocuments[]" :id="option.value" :checked="selectedProducts.includes(option.value)" /> {{ option.label }}
</div>
</template>
</div>
You can set :checked based on if the id of the current element is in the array:
<template v-for="(option) in documentDircionary">
<div class="form-group form-row" :key="option.name">
<CCol sm="12">
<input type="checkbox" name="selectedDocuments[]" :id="option.value" :checked="selectedProducts.includes(option.value)" /> {{ option.label }}
</CCol>
</div>
</template>
I'm new using Vue and specifically Bootstrap Vue and I'm trying to build a form with multiple radio groups.
My problem is that when I change the value in one of them the others don't change their values (this was checked with Vue DevTools) but visually it looks like none of the values are selected
I don't know what is wrong with my approach
I post here a simplified version of the code looking for some help, thanks in advance:
<template>
<div>
<b-form-group label="Radio group 1" v-slot="{ ariaDescribedby }">
<b-form-radio-group
id="radio-group-1"
v-model="selected1"
:options="options1"
:aria-describedby="ariaDescribedby"
name="radio-options"
></b-form-radio-group>
</b-form-group>
<b-form-group label="Radio Group 2" v-slot="{ ariaDescribedby }">
<b-form-radio-group
id="radio-group-2"
v-model="selected2"
:options="options2"
:aria-describedby="ariaDescribedby"
name="radio-options"
></b-form-radio-group>
</b-form-group>
</div>
</template>
<script>
export default {
data() {
return {
selected1: 'first',
options1: [
{ text: 'First', value: 'first' },
{ text: 'Second', value: 'second' },
],
selected2: 'one',
options2: [
{ text: 'One', value: 'one' },
{ text: 'Two', value: 'two' },
]
}
}
}
</script>
Since both <b-form-radio-group> elements have the same name, "radio-options", visually they are treated like one group. The different v-model would still function correctly but this isn't what you want visually. Give the second group a different name:
<b-form-radio-group
id="radio-group-2"
v-model="selected2"
:options="options2"
:aria-describedby="ariaDescribedby"
name="radio-options2"
></b-form-radio-group>
Here I changed it to radio-options2.
I made a vue.js bootstrap table for loading some data from local JSON files.
I'm trying to implement show/hide columns via checkboxes.
I think I've solved most of the problem, but the problem is when I hide a column and then press on that same checkbox again (to make column visible again) I lose the order of table (that column becomes last column) and so on.
For example if I hide "Timestamp" column which is first table header in my table and then press to show it again it is no longer on first place, instead it gets created on last place.
https://imgur.com/BaTfgci --> this is how app looks right now
https://codepen.io/frane_caleta/pen/KKPMKrL --> codepen of my code, you won't be able to load it without JSON file though
https://imgur.com/a/23jx0lZ --> JSON data example
First time asking question here, so feel free to ask me if you need some more information to solve the problem :)
<b-form-group label="Hide columns: ">
<b-form-checkbox-group id="checkbox-group-1" v-model="selected" :options="fields" name="flavour-1">
</b-form-checkbox-group>
</b-form-group>
//my table
<b-table id="myTable"
:small="small"
:bordered="bordered"
hover head-variant="dark"
stacked="md"
:items="cptItems"
:fields="selected"
:current-page="currentPage"
:per-page="perPage"
:filter="filter"
:sort-by.sync="sortBy"
:sort-desc.sync="sortDesc"
#filtered="onFiltered"
:tbody-tr-class="rowClass"
v-if="selected.length > 0">
</b-table>
//Javascript file
function initializeVue() {
return new Vue({
el: '#app',
data() {
return {
items: data.logdatas,
selected: [],
fields: [{
text: 'Origin',
value: {
key: 'origin',
label: 'Origin',
sortable: true,
class: 'text-center',
index: 0
}
},
{
text: 'Timestamp',
value: {
key: 'timeStamp',
label: 'Timestamp',
sortable: true,
class: 'text-center',
index: 1
}
},
{
text: 'Level',
value: {
key: 'level',
label: 'Level',
sortable: true,
class: 'text-center',
index: 2
}
}, ...there are 4 more fields here like this...
//my method for creating those checkboxes
created() {
this.selected = this.fields.map(field => field.value);
}
the selected data is your culprit. b-checkbox-group :selection lists items in order of selection.
example2
b-table :fields lists columns in the order of the items.
better make a static fields-list and filter by selection.
// make this data or property
let columnNames = ["one", "two", "three", "infinity", "pi"];
// make this data
let selected = []
//make this computed // can be optimized
let activeFields = columNames.filter(name => selected.includes(name))
// more like this
export default {
data(){
return {
selected: [],
columnNames: ['name1', 'name2']
},
computed(){
activeColumns(){
return this.columnNames.filter(this.selected.includes) || []
}
}
const app = new Vue({
data(){
return {
currentPage: 0,
perPage: 10,
fields: ['age', 'first_name', 'last_name'],
//selected: [],
selected: ['age', 'first_name', 'last_name'],
items: [
{ age: 40, first_name: 'Dickerson', last_name: 'Macdonald' },
{ age: 21, first_name: 'Larsen', last_name: 'Shaw' },
{ age: 89, first_name: 'Geneva', last_name: 'Wilson' },
{ age: 38, first_name: 'Jami', last_name: 'Carney' }
]
}
},
computed: {
activeFields(){
return this.fields.filter(name => this.selected.includes(name))
}
}
}).$mount("#app");
<!-- Add this to <head> -->
<!-- Load required Bootstrap and BootstrapVue CSS -->
<link type="text/css" rel="stylesheet" href="//unpkg.com/bootstrap/dist/css/bootstrap.min.css" />
<link type="text/css" rel="stylesheet" href="//unpkg.com/bootstrap-vue#latest/dist/bootstrap-vue.min.css" />
<!-- Load polyfills to support older browsers -->
<script src="//polyfill.io/v3/polyfill.min.js?features=es2015%2CIntersectionObserver" crossorigin="anonymous"></script>
<!-- Load Vue followed by BootstrapVue -->
<script src="//unpkg.com/vue#latest/dist/vue.min.js"></script>
<script src="//unpkg.com/bootstrap-vue#latest/dist/bootstrap-vue.min.js"></script>
<div id="app">
<b-form-group label="Hide columns: ">
<b-form-checkbox-group id="checkbox-group-1" v-model="selected" :options="fields" name="flavour-1">
</b-form-checkbox-group>
</b-form-group>
<b-table id="myTable"
:bordered="true"
hover head-variant="dark"
stacked="md"
:items="items"
:fields="selected"
:current-page="currentPage"
:per-page="perPage"
tbody-tr-class="row-class"
v-if="selected.length > 0">
</b-table>
<b-table id="myTable"
:bordered="true"
hover head-variant="dark"
stacked="md"
:items="items"
:fields="activeFields"
:current-page="currentPage"
:per-page="perPage"
tbody-tr-class="row-class"
v-if="selected.length > 0">
</b-table>
</div>
I'm still new to AngularJS, and I've tried looking for the solution to my problem but I can't seem to find one that specifically addresses this. Sorry if this has been asked before! And by new, I mean, I'm still pretty clueless on how much of this works.
I have an array of items that I'm displaying with ng-repeat. Each item has a drop down where they can select Yes or No, or leave it unselected. The data is sorted so that anything that's set to Yes or No moves to the top of the list.
I currently also have a checkbox that allows them to Hide an item, which hides it, and moves it to the end of the array, so that it doesn't clutter them up.
I would like to instead have a button that hides all unselected items (a value of neither Yes nor No), instead of making them hide one at a time.
Second: Any item where they've selected Yes should have their names displayed in Field One; Any items where they've selected No should have their names displayed in Field Two.
Here is my code:
var app = angular.module('List', []);
app.controller('MainController', ['$scope', function ($scope) {
$scope.selected = false;
$scope.pList = [
{
id: '1',
title: 'Apples',
checked: false
},
{
id: '2',
title: 'Oranges',
checked: false
},
{
id: '3',
title: 'Bananas',
checked: false
},
{
id: '3',
title: 'Pears',
checked: false
}
];
$scope.pStatus = [
{
stat: 'Unselected',
color: 'black'
},
{
stat: 'Yes',
color: 'green',
},
{
stat: 'No',
color: 'red'
}
];
}]);
<div class="main" ng-controller="MainController">
<div class="container">
<div class="card" ng-repeat="stuff in pList | orderBy: ['checked', 'selectedpStatus', 'id']:false">
<div ng-hide="stuff.checked">
<h2 class="title">{{ stuff.title }}</h2>
<br /><br /><br />
<div class="status" ng-style="{'color':stuff.pStatus.color}">
<select ng-model="stuff.selectedpStatus" ng-options="item.stat for item in pStatus"></select>
</div>
<p class="normal">Hide <label><input type="checkbox" ng-model="stuff.checked" id="{{ stuff.id }}" /></label></p>
</div>
</div>
<br /><br />
<div class="main">
Field One: :{{ stuff.title }}:
<br />
Field Two: :{{ stuff.title }}
</div>
</div>
Thank you for any help!
There are several questions/clarifications I'd typically want to ask, but here's an answer that should guide you further:
Have a property on the scope that stores whether the filter should be applied or not.
You can then filter the array using a filter in the controller, or defined globally. Or, just hide the elements you don't want shown using an ng-if directive on each element.
The logic for showing the title in field 1 vs 2 is simple; the issue is whether you do this for all items, or if you want to somehow select one to show outside of the repeat.
Here's a basic solution though:
<button type="button" ng-click="toggle()">Hide/Show Unselected</button><br>
Hide all: {{ hideAll }}<br />
<div class="card" ng-repeat="stuff in pList | orderBy: ['checked', 'selectedpStatus', 'id']:false"
ng-if="!hideAll || !stuff.selectedpStatus || stuff.selectedpStatus.stat !== 'Unselected'">
<div ng-hide="stuff.checked">
<h2 class="title">{{ stuff.title }}</h2>
<div class="status" ng-style="{'color':stuff.pStatus.color}">
<select ng-model="stuff.selectedpStatus" ng-options="item.stat for item in pStatus"></select>
</div>
stuff.selectedpStatus: {{ stuff.selectedpStatus }}<br>
Field One: {{ stuff.selectedpStatus && stuff.selectedpStatus.stat === 'Yes' ? stuff.title : '' }}<br />
Field Two: {{ stuff.selectedpStatus && stuff.selectedpStatus.stat === 'No' ? stuff.title : '' }}<br />
</div>
</div>
and
var app = angular.module('plunker', []);
app.controller('MainCtrl', function($scope) {
$scope.selected = false;
$scope.hideAll = false;
$scope.pList = [{
id: '1',
title: 'Apples',
checked: false
}, {
id: '2',
title: 'Oranges',
checked: false
}, {
id: '3',
title: 'Bananas',
checked: false
}, {
id: '3',
title: 'Pears',
checked: false
}];
$scope.pStatus = [{
stat: 'Unselected',
color: 'black'
}, {
stat: 'Yes',
color: 'green',
}, {
stat: 'No',
color: 'red'
}];
$scope.toggle = function() {
$scope.hideAll = !$scope.hideAll;
}
});
In a plunkr: https://plnkr.co/edit/PBr753nznrMwsgAIsTwE?p=preview