We Keep Coding

vue.js how to get the value of the custom element attribute parameters?

In the use of vue.js, on the definition of attribute id number how to get it?
I want to $refs read id="20" value. I hope console.log is 21,10,15. go to the jsfiddle
Look at:
var app = new Vue({
el: "#app",
data: {
fruit: [{
id: 21,
name: 'Peach'
}, {
id: 10,
name: 'Apple'
}, {
id: 15,
name: 'Lemon'
}],
branid: ''
},
mounted() {
console.log(this.$refs)
}
})
<div id="app">
<ul>
<li v-for="item in fruit" :id="item.id" ref="branid">{{item.name}}</li>
</ul>
</div>

You should be able to simply refer to the branid key and extract the id from each li item, see the updated fiddle here:
console.log(this.$refs.branid.map(li => li.id))

you don't need to get it through this.$refs, it is in your fruit array so you can easily get it by using map or filter function:
Example:
mounted() {
var ids = this.fruit.map(function(obj) {
return obj.id;
});
console.log(ids)
}

Make a Tree view from JSON data using React JS

First of all i am very new to React JS. So that i am writing this question. I am trying this for three days.
What I have to do, make a list of category, like-
Category1
->Sub-Category1
->Sub-Category2
Categroy2
Category3
.
.
.
CategoryN
And I have this json data to make the listing
[
{
Id: 1,
Name: "Category1",
ParentId: 0,
},
{
Id: 5,
Name: "Sub-Category1",
ParentId: 1,
},
{
Id: 23,
Name: "Sub-Category2",
ParentId: 1,
},
{
Id: 50,
Name: "Category2",
ParentId: 0,
},
{
Id: 54,
Name: "Category3",
ParentId: 0,
},
];
I have tried many open source examples, but their json data format is not like mine. so that that are not useful for me. I have build something but that is not like my expected result. Here is my jsfiddle link what i have done.
https://jsfiddle.net/mrahman_cse/6wwan1fn/
Note: Every subcategory will goes under a category depend on "ParentId",If any one have "ParentId":0 then, it is actually a category, not subcategory. please see the JSON
Thanks in advance.

You can use this code jsfiddle
This example allows to add new nested categories, and do nested searching.
code with comments:
var SearchExample = React.createClass({
getInitialState: function() {
return {
searchString: ''
};
},
handleChange: function(e) {
this.setState({
searchString: e.target.value.trim().toLowerCase()
});
},
isMatch(e,searchString){
return e.Name.toLowerCase().match(searchString)
},
nestingSerch(e,searchString){
//recursive searching nesting
return this.isMatch(e,searchString) || (e.subcats.length && e.subcats.some(e=>this.nestingSerch(e,searchString)));
},
renderCat(cat){
//recursive rendering
return (
<li key={cat.Id}> {cat.Name}
{(cat.subcats && cat.subcats.length) ? <ul>{cat.subcats.map(this.renderCat)}</ul>:""}
</li>);
},
render() {
let {items} = this.props;
let {searchString} = this.state;
//filtering cattegories
if (searchString.length) {
items = items.filter(e=>this.nestingSerch(e,searchString))
console.log(items);
};
//nesting, adding to cattegories their subcatigories
items.forEach(e=>e.subcats=items.filter(el=>el.ParentId==e.Id));
//filter root categories
items=items.filter(e=>e.ParentId==0);
//filter root categories
return (
<div>
<input onChange={this.handleChange} placeholder="Type here" type="text" value={this.state.searchString}/>
<ul>{items.map(this.renderCat)}</ul>
</div>
);
}
});

AngularJS: Using ng-selected to select multiple options, based on collection

I have two arrays of objects, one array being a subset of the other:
$scope.taskGroups = [
{id: 1, name: 'group1', description: 'description1'},
{id: 2, name: 'group2', description: 'description2'},
{id: 3, name: 'group3', description: 'description3'}
];
$scope.selectedGroups = [
{id: 1, name: 'group1', description: 'description1'},
{id: 2, name: 'group3', description: 'description3'}
];
After unsuccessfully trying to get my head around using ng-option, I thought that I could perhaps create a function to determine if an option should be selected in the select list, based on what I picked up in the documentation:
ngSelected
- directive in module ng Sets the selected attribute on the element, if the expression inside ngSelected is truthy.
So, I came up with this function:
$scope.inSelectedGroups = function(taskGroup) {
angular.forEach($scope.selectedGroups, function(group) {
if (taskGroup.id == group.id) {
return true;
}
return false;
});
};
and tried to use it in this html:
<select multiple ng-model="selectedGroups" style="width: 100%" size="7">
<option ng-repeat="taskGroup in taskGroups" value="{{taskGroup.id}}" ng-selected="inSelectedGroups(taskGroup)">{{taskGroup.name}}</option>
</select>
but, no dice - the full list of taskGroups shows, but the selectedTaskGroups aren't, well, selected...
Am I barking up the wrong tree here?

the full list of taskGroups shows, but the selectedTaskGroups aren't,
well, selected.
I tried your solution which is using the ngSelected attribute but I was unsuccessful as well so I tried using the ngOptions instead and it works.
angular.module('app', []).controller('TestController', ['$scope',
function($scope) {
$scope.taskGroups = [{
id: 1,
name: 'group1',
description: 'description1'
}, {
id: 2,
name: 'group2',
description: 'description2'
}, {
id: 3,
name: 'group3',
description: 'description3'
}];
$scope.selectedGroups = [{
id: 1,
name: 'group1',
description: 'description1'
}, {
id: 2,
name: 'group3',
description: 'description3'
}];
}
])
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app" ng-controller="TestController">
<select multiple="true" ng-model="selectedGroups" style="width: 100%" ng-options="taskGroup.id as taskGroup.description for taskGroup in taskGroups track by taskGroup.id" size="7">
</select>
</div>

See carefully, you are returning Boolean value from function defined in angular.forEach parameter and so nothing is returned from inSelectedGroups function
Try modifying your function to:
$scope.inSelectedGroups = function(taskGroup) {
var flag = false;
angular.forEach($scope.selectedGroups, function(group) {
if (taskGroup.id == group.id) {
flag = true;
return;
}
flag = false;
return;
});
return flag;
};

Angular select all checkboxes from outside ng-repeat

Description
I have a small product order system, where a user can add order lines, and on each order line add one or more products. (I realise it's quite unusual for more than one product to be on the same order line, but that's another issue).
The products that can be selected on each line is based on a hierarchy of products. For example:
Example product display
T-Shirts
V-neck
Round-neck
String vest
JSON data
$scope.products = [
{
id: 1,
name: 'T Shirts',
children: [
{ id: 4, name: 'Round-neck', children: [] },
{ id: 5, name: 'V-neck', children: [] },
{ id: 6, name: 'String vest (exclude)', children: [] }
]
},
{
id: 2,
name: 'Jackets',
children: [
{ id: 7, name: 'Denim jacket', children: [] },
{ id: 8, name: 'Glitter jacket', children: [] }
]
},
{
id: 3,
name: 'Shoes',
children: [
{ id: 9, name: 'Oxfords', children: [] },
{ id: 10, name: 'Brogues', children: [] },
{ id: 11, name: 'Trainers (exclude)', children: []}
]
}
];
T-Shirts isn't selectable, but the 3 child products are.
What I'm trying to achieve
What I'd like to be able to do, is have a 'select all' button which automatically adds the three products to the order line.
A secondary requirement, is that when the 'select all' button is pressed, it excludes certain products based on the ID of the product. I've created an 'exclusion' array for this.
I've set up a Plunker to illustrate the shopping cart, and what I'm trying to do.
So far it can:
Add / remove order lines
Add / remove products
Add a 'check' for all products in a section, excluding any that are in the 'exclusions' array
The problem
However, although it adds the check in the input, it doesn't trigger the ng-change on the input:
<table class="striped table">
<thead>
<tr>
<td class="col-md-3"></td>
<td class="col-md-6"></td>
<td class="col-md-3"><a ng-click="addLine()" class="btn btn-success">+ Add order line</a></td>
</tr>
</thead>
<tbody>
<tr ng-repeat="line in orderHeader.lines">
<td class="col-md-3">
<ul>
<li ng-repeat="product in products" id="line_{{ line.no }}_product_{{ product.id }}">
{{ product.name }} <a ng-click="selectAll(product.id, line.no)" class="btn btn-primary">Select all</a>
<ul>
<li ng-repeat="child in product.children">
<input type="checkbox"
ng-change="sync(bool, child, line)"
ng-model="bool"
data-category="{{child.id}}"
id="check_{{ line.no }}_product_{{ child.id }}"
ng-checked="isChecked(child.id, line)">
{{ child.name }}
</li>
</ul>
</li>
</ul>
</td>
<td class="col-md-6">
<pre style="max-width: 400px">{{ line }}</pre>
</td>
<td class="col-md-3">
<a ng-click="removeLine(line)" class="btn btn-warning">Remove line</a>
</td>
</tr>
</tbody>
</table>
Javascript
$scope.selectAll = function(product_id, line){
target = document.getElementById('line_'+line+'_product_'+product_id);
checkboxes = target.getElementsByTagName('input');
for (var i = 0; i < checkboxes.length; i++) {
if (checkboxes[i].type == 'checkbox') {
category = checkboxes[i].dataset.category;
if($scope.excluded.indexOf(parseInt(category)) == -1)
{
checkboxes[i].checked = true;
// TODO: Check the checkbox, and set its bool parameter to TRUE
}
}
}
}
Update with full solution
There were a couple of issues with the above code. Firstly, I was trying to solve the problem by manipulating the DOM which is very much against what Angular tries to achieve.
So the solution was to add a 'checked' property on the products so that I can track if they are contained on the order line, and then the view is updated automatically.
One drawback of this method is that the payload would be significantly larger (unless it is filtered before being sent to the back-end API) as each order line now has data for ALL products, even if they aren't selected.
Also, one point that tripped me up was forgetting that Javascript passes references of objects / arrays, not a new copy.
The solution
Javascript
var myApp = angular.module('myApp', []);
myApp.controller('CartForm', ['$scope', function($scope) {
var inventory = [
{
id: 1,
name: 'T Shirts',
checked: false,
children: [
{ id: 4, name: 'Round-neck', checked: false, children: [] },
{ id: 5, name: 'V-neck', checked: false, children: [] },
{ id: 6, name: 'String vest (exclude)', checked: false, children: [] }
]
},
{
id: 2,
name: 'Jackets',
checked: false,
children: [
{ id: 7, name: 'Denim jacket', checked: false, children: [] },
{ id: 8, name: 'Glitter jacket', checked: false, children: [] }
]
},
{
id: 3,
name: 'Shoes',
checked: false,
children: [
{ id: 9, name: 'Oxfords', checked: false, children: [] },
{ id: 10, name: 'Brogues', checked: false, children: [] },
{ id: 11, name: 'Trainers (exclude)', checked: false, children: []}
]
}
];
$scope.debug_mode = false;
var products = angular.copy(inventory);
$scope.orderHeader = {
order_no: 1,
total: 0,
lines: [
{
no: 1,
products: products,
total: 0,
quantity: 0
}
]
};
$scope.excluded = [6, 11];
$scope.addLine = function() {
var products = angular.copy(inventory);
$scope.orderHeader.lines.push({
no: $scope.orderHeader.lines.length + 1,
products: products,
quantity: 1,
total: 0
});
$scope.loading = false;
}
$scope.removeLine = function(index) {
$scope.orderHeader.lines.splice(index, 1);
}
$scope.selectAll = function(product){
angular.forEach(product.children, function(item){
if($scope.excluded.indexOf(parseInt(item.id)) == -1) {
item.checked=true;
}
});
}
$scope.removeAll = function(product){
angular.forEach(product.children, function(item){
item.checked=false;
});
}
$scope.toggleDebugMode = function(){
$scope.debug_mode = ($scope.debug_mode ? false : true);
}
}]);
Click here to see the Plunker

You are really over complicating things first by not taking advantage of passing objects and arrays into your controller functions and also by using the DOM and not your data models to try to update states
Consider this simplification that adds a checked property to each product via ng-model
<!-- checkboxes -->
<li ng-repeat="child in product.children">
<input ng-model="child.checked" >
</li>
If it's not practical to add properties to the items themselves, you can always keep another array for the checked properties that would have matching indexes with the child arrays. Use $index in ng-repeat for that
And passing whole objects into selectAll()
<a ng-click="selectAll(product,line)">
Which allows in controller to do:
$scope.selectAll = function(product, line){
angular.forEach(product.children, function(item){
item.checked=true;
});
line.products=product.children;
}
With angular you need to always think of manipulating your data models first, and let angular manage the DOM
Strongly suggest reading : "Thinking in AngularJS" if I have a jQuery background?
DEMO

Why ng-change isn't fired when the checkbox is checked programatically?
It happens because
if($scope.excluded.indexOf(parseInt(category)) == -1)
{
checkboxes[i].checked = true;
// TODO: Check the checkbox, and set its bool parameter to TRUE
}
only affects the view (DOM). ng-change works alongside ngModel, which can't be aware that the checkbox really changed visually.
I suggest you to refer to the solution I provided at How can I get angular.js checkboxes with select/unselect all functionality and indeterminate values?, works with any model structure you have (some may call this the Angular way).

Tree is not displayed propery in DOJO

I am new to DOJO 1.6
I trying to display tree with sub folders.
dojo.require("dojo.data.ItemFileWriteStore");
dojo.require("dijit.form.Button");
dojo.require("dijit.tree.TreeStoreModel");
dojo.require("dojo.store.Memory");
dojo.require("dijit.Tree");
dojo.addOnLoad(function() {
// Create test store, adding the getChildren() method required by ObjectStoreModel
var data = [ { id: 1, name: "answerTypeLabel", type:'scenario', children:[{_reference: 2}]},
{ id: 2, name: "acceptRequestLabel", type:'paragraph', data: "acceptRequestLabel"},
{ id: 3, name: "rejectRequestLabel", type:'scenario', children:[{_reference: 5},{_reference: 6}]},
{ id: 4, name: "MoreInformationLabel", type:'scenario', children:[{_reference: 7},{_reference: 8}]},
{ id: 5, name: "rejectRequestStatusLabel", type:'paragraph', data: "rejectRequestStatusLabel"},
{ id: 6, name: "rejectRequestNotCoveredLabel", type:'paragraph', data: "rejectRequestNotCoveredLabel" },
{ id: 7, name: "MoreInformationDocumentLabel", type:'paragraph', data: "MoreInformationDocumentLabel"},
{ id: 8, name: "MoreInformationDataLabel", type:'paragraph', data: "MoreInformationDataLabel"}
];
// Building the store object
var sortableStore = new dojo.data.ItemFileWriteStore({
data: {
identifier: 'id',
label: 'name',
items: data
},
});
// building the model
var model = new dijit.tree.ForestStoreModel({
store: sortableStore,
query: {
id: "*"
},
rootId: "root",
rootLabel: "sorting of tree"
});
// Building the tree
var tree = new dijit.Tree({
model:model,
'class': "tundra"
},
"resourceTree");
});
.
Here Id 2 in a child of Id 1 , so while displaying Id 2 must be inside Id 1.
But here Id 2 appears inside id 1 and also on the same level of id 1.(There is a duplication of all the all the child ids ).
This is case with id 2,5,6,7,8.
I want to remove the duplication.
Ouptput should be like

Reason is that you apply a non-hierachial store onto a tree which is not supposed to display items that has parents as a sibling to the root.
To 'fix' this, the referenced id's needs to not get matched by the model query.
In your case of data, it looks like the type:'paragraph' is supposed to be leaves. Therefore set the query to match type:'scenario' as opposed to your current ' id: "*" '
var model = new dijit.tree.ForestStoreModel({
store: sortableStore,
query: {
type:'scenario'
},
rootId: "root",
rootLabel: "sorting of tree"
});