I want to do something like this
<input type="checkbox" ng-model="first" ng-click="chkSelect()"/><label>First</label>
<input type="checkbox" ng-model="second" ng-click="chkSelect()"/><label>Second</label>
<input type="checkbox" ng-model="third" ng-click="chkSelect()"/><label>Third</label>
<input type="checkbox" ng-model="forth" ng-click="chkSelect()"/><label>Forth</label>
<button>Selected</button>
On button click I want to display selected checkbox labelname.
$scope.chkSelect = function (value) {
console.log(value);
};
Because the checkboxes are mapped, you can reference $scope.first, $scope.second, etc in your chkSelect() function. It's also possible to have a set of checkboxes mapped as a single array of data instead of having to give each checkbox a name. This is handy if you are generating the checkboxes, perhaps from a set of data.
I agree with Bublebee Mans solution. You've left out a lot of detail on why you're trying to get the label. In any case if you REALLY want to get it you can do this:
$scope.chkSelect = function (value) {
for(var key in $scope){
var inputs = document.querySelectorAll("input[ng-model='" + key + "']");
if(inputs.length){
var selectedInput = inputs[0];
var label = selectedInput.nextSibling;
console.log(label.innerHTML);
}
};
};
You can mess around with it to see if it's indeed selected.
fiddle: http://jsfiddle.net/pzz6s/
Side note, for anybody who knows angular please forgive me.
If you are dealing with server data, you might need isolated html block and deal with data in controller only.
You can do it by creating array in controller, maybe your data from response, and use ngRepeat directive to deal independently in html code.
Here is what I am telling you:
HTML:
<form ng-controller="MyCtrl">
<label ng-repeat="name in names" for="{{name}}">
{{name}}
<input type="checkbox"
ng-model="my[name]"
id="{{name}}"
name="favorite" />
</label>
<div>You chose <label ng-repeat="(key, value) in my">
<span ng-show="value == true">{{key}}<span>
</label>
</div>
</form>
Javascript
var myApp = angular.module('myApp',[]);
function MyCtrl($scope) {
$scope.names = ['pizza', 'unicorns', 'robots'];
$scope.my = { };
}
You want to have something like the following in your controller (untested, working from memory):
$scope.checkBoxModels = [ { name: 'first', checked: false }, { name: 'second', checked: false }, { name: 'third', checked: false }, { name: 'fourth', checked: false } ];
Then in your view:
<input ng-repeat"checkboxModel in CheckBoxModels" ng-model="checkBoxModel.checked" ng-click="chkSelect(checkBoxModel)" /><label>{{checkBoxModel.name}}</label>
Then update your function:
$scope.chkSelect = function (checkBoxModel) {
console.log(checkBoxModel.name);
};
Related
I have list of objects named rolePermissionList like this:
[{"id":1,"name":"createUser","type":"user","marked":1},{"id":2,"name":"deleteUser","type":"user","marked":1},{"id":3,"name":"editRole","type":"role","marked":0}]
and I use ng-repeat to repeat checkboxes using the values in that list like this
<div class="form-group">
<label>Role Permissions:</label>
<div class="checkbox" ng-repeat="permission in rolePermissionList">
<label>
<input type="checkbox" ng-model="idsPermission[permission .idPermission ]"
ng-checked="permission.checked">{{permission.name}}
</label>
</div>
</div>
the ng-model of the checkboxes is named idsPermission and it's a list of numbers, those numbers are the IDS of the objects.
When I load the page the checkboxes that are supposed to be checked are checked this part works fine, but when I check another checkbox all the checkboxes gets checked, and when I uncheck a checkbox the same thing happens all the checkboxes gets unchecked.
I use that list of numbers named idsPermission to get all the IDS of the checkboxes that are checked, this worked before I used the directive ng-checked="permission.checked", but now I need to use it since now I need to show the checkboxes that are already marked.
this is my controller
angular.module('MyApp')
.controller('RolCtrl', ['$scope', 'RolService',
function ($scope, RolService) {
$scope.idsPermission = {};
$scope.getListCheckBoxesEditRole = function (idRole) {
$scope.selectRol.descripcion;
RolService.getListCheckBoxesEditRole(idRole)
.then(
function (d) {
var userPermissionList = [];
for (var permission in d) {
if (d[permission ].type === 'user') {
if (d[permission ].marked === 1)
{
d[permission ].checked = true;
userPermissionList.push(d[permission ]);
} else {
userPermissionList.push(d[permission ]);
}
}
}
$scope.rolePermissionList = userPermissionList;
},
function (errResponse) {
console.error('ERROR');
}
);
};
}
$scope.getListCheckBoxesEditRole(3);
]);
The RolService.getListCheckBoxesEditRole(idRole) service returns this JSON [{"id":1,"name":"createUser","type":"user","marked":1},{"id":2,"name":"deleteUser","type":"user","marked":1},{"id":3,"name":"editRole","type":"role","marked":0}]
and what I do in the controller is iterate over that list and check if the marked field is 1 if it's 1 I do this d[permission ].checked = true; I what I think that I do in that line is setting the checked value to true so I could use this directive in the html view ng-checked="permission.checked"
I tried doing this ng-checked="idsPermission[permission.checked]" but when I do this the values that are marked=1 in the JSON that I paste above don't appear checked when I load the page, but if I put it like this ng-checked="permission.checked" they appear marked as they should, but when I click a checkbox all the checkboxes gets selected.
I came across too many issues to document but the main problem was how you are iterating through the array that is returned from the service. It should be something like this:
Controller
angular.forEach(d.data, function(permission) {
if (permission.type === 'user') {
if (permission.marked === 1) {
permission.checked = true;
userPermissionList.push(permission);
} else {
userPermissionList.push(permission);
}
}
});
Then you can simplify your html like this:
HTML
<input type="checkbox" ng-model="permission.checked" />
You can see all of the changes in this working plunk.
I can't see in your code that $scope.idsPermission is getting defined. In ng-repeat you only set the key for the object but the value is undefined. That's why the checkbox won't show the correct value.
You could use ng-init to initialize the model. Please have a look at the simplified demo below or this fiddle.
(Also defining the models in your controller would be possible.)
Only using ng-model should be enough for the checkbox to work. I think I've read somewhere that ng-checked and ng-model aren't working smoothly together.
angular.module('demoApp', [])
.controller('mainCtrl', MainCtrl);
function MainCtrl() {
var vm = this;
angular.extend(vm, {
data: [{
id: 0,
marked: 1
}, {
id: 1,
marked: 0
}, {
id: 2,
marked: 1
}]
})
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="demoApp" ng-controller="mainCtrl as ctrl">
<div ng-repeat="item in ctrl.data">
<input type="checkbox" ng-init="ctrl.idPermissions[item.id] = !!item.marked" ng-model="ctrl.idPermissions[item.id]"/>{{item.id}}
</div>
<pre>
permissions: {{ctrl.idPermissions | json: 2}}
data{{ctrl.data | json: 2}}</pre>
</div>
I have been working on a complex angular page which has been causing performance issue. To highlight the problem I have created a fiddle http://jsfiddle.net/4ex2xgL1/3/ here.
Essentially the performance issue is being caused by ng-class statement which has a function in it.
<span class="done-{{todo.done}}" ng-class="myfunction()">{{todo.text}}</span>
The span is in an ng-repeat. On running the fiddle one can see that ng-class gets executed several times when the page loads and on each key up it gets called as many time as number of items in the TODO list.
This is a lot simpler case, in my case I have 780 items on my page and the function ends up being evaluated aroung 3000 times!
One of the solution we saw is to break up the scope but it will cause almost a rewrite of my app.
We also tried https://github.com/Pasvaz/bindonce but it doesn't seem to be working with highly dynamic content.
Any thoughts?
I built a tree with https://github.com/JimLiu/angular-ui-tree with almost 500 items to render, with quite a lot of listeners. It takes 5 seconds to render. Bindonce won't work there.
The only solution out there is make ng-repeat do less. Keep the list small with a pagination, search or anything. Its the best shot as far as I know.
Well here are my recommendations
use ng-change on the checkbox to manipulate dom or anything rather using ng-class, it will improve your performance drastically.
<li ng-repeat="todo in todos track by todo.id">
<input type="checkbox" ng-model="todo.done" ng-change="myfunction()">
<span class="done-{{todo.done}}">{{todo.text}}</span>
</li>
http://jsfiddle.net/4ex2xgL1/3/
use track by in ng-repeat if you have ids, more here http://www.codelord.net/2014/04/15/improving-ng-repeat-performance-with-track-by/
dont show 780 items in a list. Use a searchbox to show some 100 or 50 or you know better
quick-ng-repeat not used yet, try testing it https://github.com/allaud/quick-ng-repeat
finally a few good http://tech.small-improvements.com/2013/09/10/angularjs-performance-with-large-lists/
Finally I found the solution and it will helps lot to improve performance in angular js.
If your model changes dynamically and if you have lots of data and then also it improve AngularJS pages rendering up to 1000% and more - no kidding !.
Fore more information you can visit : http://orangevolt.blogspot.in/2013/08/superspeed-your-angularjs-apps.html
Follow the steps:
download the library from the link:library
2.example without library:(check your console)
function MyController( $scope) {
var entries = [
{ label : 'one', value : 'first entry'},
{ label : 'two', value : 'second entry'},
{ label : 'three', value : 'third entry'}
];
$scope.label ="";
$scope.value ="";
$scope.order = 'label';
$scope.add = function() {
entries.push({
label : $scope.label,
value : $scope.value
});
};
$scope.getEntries = function() {
console && console.log( "getEntries() called");
return entries;
};
}
<script src="https://raw.githubusercontent.com/lodash/lodash/2.4.1/dist/lodash.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<form name="myform" ng-app ng-controller="MyController">
Label/Value :
<input type="text" required ng-model="label">
<input type="text" required ng-model="value">
<button
ng-disabled="!myform.$valid"
ng-click="add()"
>Add</button>
<fieldset>
<legend>
Entries sorted by
<select
ng-model="order"
ng-options="property for property in [ 'label', 'value']">
</select>
</legend>
<div ng-repeat="entry in getEntries() | orderBy:order">
{{entry.label}} = "{{entry.value}}"
</div>
</fieldset>
</form>
3.example with library:(check your console)
function MyController( $scope) {
var entries = [
{ label : 'one', value : 'first entry'},
{ label : 'two', value : 'second entry'},
{ label : 'three', value : 'third entry'}
];
$scope.label ="";
$scope.value ="";
$scope.order = 'label';
$scope.add = function() {
entries.push({
label : $scope.label,
value : $scope.value
});
// clear cache
$scope.getEntries.cache = {};
};
$scope.getEntries = _.memoize(
function() {
console && console.log( "getEntries() sorted by '" + $scope.order + " 'called");
// return entries sorted by value of $scope.order
return _.sortBy( entries, $scope.order);
},
function() {
// return the cache key for the current result to store
return $scope.order;
}
);
}
<script src="https://raw.githubusercontent.com/lodash/lodash/2.4.1/dist/lodash.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.20/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<form name="myform" ng-app ng-controller="MyController">
Label/Value :
<input type="text" required ng-model="label">
<input type="text" required ng-model="value">
<button
ng-disabled="!myform.$valid"
ng-click="add()"
>Add</button>
<fieldset>
<legend>
Entries sorted by
<select
ng-model="order"
ng-options="property for property in [ 'label', 'value']">
</select>
</legend>
<div ng-repeat="entry in getEntries()">
{{entry.label}} = "{{entry.value}}"
</div>
</fieldset>
</form>
I am trying to bind a checkbox to each line in a list of objects, in a very similar fashion to a question asked/answered here: Binding a list of objects to a list of checkboxes
Essentially, as follows:
<ul data-bind="foreach: phones">
<li>
<input type='text' data-bind="attr: {value:phone}, disable: $root.selectedPhones"/>
<input type="checkbox" data-bind="attr: {value:id}, checked: $root.selectedPhones" />
</li>
</ul>
<hr/> selected phones:
<div data-bind="text: ko.toJSON($root.selectedPhones)"></div>
<hr/> phones:
<div data-bind="text: ko.toJSON($root.phones)"></div>
with js as follows:
function Phone(id,phone) {
this.id = id;
this.phone = phone;
}
var phones_list = [
new Phone(1, '11111'),
new Phone(2, '22222'),
new Phone(3, '33333')
];
var viewModel = {
phones: ko.observableArray(phones_list),
selectedPhones: ko.observableArray()
};
ko.applyBindings(viewModel);
The idea being that in the initial state, all of the input boxes are disabled and that clicking a checkbox will enable the input box in that row.
The data is coming from a fairly deeply nested object from the server-side so I'd like to avoid 'padding' the data with an additional boolean ie avoiding new Phone(1,'xx', false)
(a) because it's probably unnecessary (b) because the structure is almost certainly going to change...
Can the selectedPhones observable be used by the enable/disable functionality to control the status of fields in that 'row'?
Hope someone can help....
I have a jsfiddle here
You can create a small helper function which checks that a given id appers in the selectedPhones:
var viewModel = {
phones: ko.observableArray(phones_list),
selectedPhones: ko.observableArray(),
enableEdit: function(id) {
return ko.utils.arrayFirst(viewModel.selectedPhones(),
function(p) { return p == id })
}
};
Then you can use this helper function in your enable binding:
<input type='text' data-bind="attr: {value:phone}, disable: $root.enableEdit(id)"/>
Demo JSFiddle.
I am new to angularjs and trying to find a solution for the setting a selected value of radio group to the ngmodel.
//my.html
<div ng-controller='controller'>
<div class="btn-group" ng-model="option" ng-repeat="arr in dragDropOption">
<input type="radio" name="optionCorrectOpt" data-ng-model="option"
value="{{dragDropOption[$index].text}}">
{{dragDropOption[$index].text}}
</div>
and
//mycontroller.js
app = angular.module('app', []);
app.controller('controller', function ($scope) {
$scope.dragDropOption = [];
$scope.option = "not set";
$scope.dragDropOption = [{
text: "analog"
}, {
text: "isdn"
}, {
text: "dsl"
}];
// $scope.option = $scope.dragDropOption[0].text;
});
My fiddle is here!
Might be it is repeated question, please help me with sharing already answerd stackoverflow question's link or new answer. Thanks in advance.
For input change
data-ng-model="option"
to:
data-ng-model="$parent.option"
Demo Fiddle
Replace
$scope.option = "not set";
<input type="radio" name="optionCorrectOpt" data-ng-model="option"
value="{{dragDropOption[$index].text}}">
To:
$scope.radioOption = {};
$scope.radioOption.selected = "not set"
<input type="radio" name="optionCorrectOpt" data-ng-model="radioOption.selected"
value="{{dragDropOption[$index].text}}">
JS FIDDLE
I have a list of Admins with a check box. I want to be able to select only one Admin.
HTML:
<tbody data-bind="foreach: people">
<tr>
<td>
<input type="checkbox" data-bind="attr: { value: id }, checked: $root.selectedAdmin">
<span data-bind="text: name"/>
</td>
</tr>
</tbody
JS:
function Admin(id, name) {
this.id = id;
this.name = name;
}
var listOfAdmin = [
new Admin(10, 'Wendy'),
new Admin(20, 'Rishi'),
new Admin(30, 'Christian')];
var viewModel = {
people: ko.observableArray(listOfAdmin),
selectedAdmin: ko.observableArray()
};
ko.applyBindings(viewModel);
For Example if Admin id 10 is selected the other admins should be deselected.
Is that Possible to do with Knockout?
You should really use radio buttons if you only want to allow multiple selection.
However if you still want to use checkboxes then on solution would be to combine the checked and the click binding:
Use the checked to check only when the current id equal to the selectedAdmin property and use the click binding to set the selectedAdmin.
So you HTML should look like this:
<input type="checkbox" data-bind="attr: { value: id },
checked: $root.selectedAdmin() == id,
click: $parent.select.bind($parent)" />
And in your view model you just need to implement the select function:
var viewModel = {
people: ko.observableArray(listOfAdmin),
selectedAdmin: ko.observableArray(),
select: function(data) {
this.selectedAdmin(data.id);
return true;
}
};
Demo JSFiddle.
Notes:
the return true; at the end of the select function. This is required to trigger the browser default behavior in this case to check the checkbox.
the .bind($parent) is needed to set the this in the select function to be the "parent" viewModel object.