I have this very simple app with a few buttons. When the button is clicked the active css should be applied. It is not working for me for some reason,
controller:
'use strict';
angular
.module('myApp')
.controller('summaryCtrl', ['$scope', function ($scope){
$scope.buttons=[
{time:'1 Hour'},
{time:'2 Hours'},
{time:'24 Hours'},
{time:'48 Hours'},
{time:'1 Week'},
{time:'1 Month'}
];
$scope.selected = $scope.buttons[0];
$scope.select= function(item) {
$scope.selected = item;
};
$scope.isActive = function(item) {
return $scope.selected === item;
};
}]);
navigation:
<div ng-controller="summaryCtrl">
<ul>
<li ng-repeat="button in buttons" id="{{ button.time }}" ng-click="selectButton($index)" ng-class="{active: $index===selectedButton}">{{ button.time }}</li>
</ul>
</div>
Plunker here: http://plnkr.co/edit/0WxnRVwaHwCBGM6wXNtS?p=preview
Many thanks for your help.
You call the selectButton method in your ng-click directive but this method doesn't exist in your $scope. You named it select(). Also, the property selectedButton you use in your ng-class directive is not the one containing the selected button. It's simply selected like you assign it in your $scope.select() method.
Try like this:
<div ng-controller="summaryCtrl">
<ul>
<li ng-repeat="button in buttons" id="{{ button.time }}" ng-click="select($index)" ng-class="{active: $index === selected}">{{ button.time }}</li>
</ul>
</div>
Related
In angularjs to show/hide dynamic submenu, I am adding and removing dynamic classes in js file. Every time when the state changes in url (i.e ui-sref={{mymenu.url}}) sub menu is not visible. If there is no state change sub menu is working properly. Can anyone please suggest.
Html
<li ng-repeat='mymenu in menuItems' ng-click="showHideMenu($event);" >
<a class="iconsize" ui-sref={{mymenu.url}}>
<i class={{mymenu.image}}></i> <strong>{{mymenu.menuName}}</strong>
<span class="fa fa-chevron-down"></span>
</a>
<ul class="submenuHide">
<li class="" ng-repeat='submenu in mymenu.submenu'>
<a>{{submenu.submenuName}}</a>
</li>
</ul>
JS
$scope.showHideMenu = function(event) {
var classname = event.target.parentElement.parentElement.children[1].className;
if(classname == 'submenuHide'){
$(event.target.parentElement.parentElement.children[1]).removeClass('submenuHide');
$(event.target.parentElement.parentElement.children[1]).addClass('submenuShow');
}else if(classname == 'submenuShow'){
$(event.target.parentElement.parentElement.children[1]).removeClass('submenuShow');
$(event.target.parentElement.parentElement.children[1]).addClass('submenuHide');
}
}
A couple things. One, you'll need to make sure your menu is outside of the individual templates you're working with. Two, using ng-class bound to an ng-model ensures that your menu state is included in the digest cycle. This will save you the jqLite and dom parsing logic.
Here's an example plunker.
So your code might look like this:
<body ng-controller="MainCtrl">
<a ui-sref="hello">Hello</a>
<a ui-sref="about">About</a>
<button ng-click="toggleMenu()">Show / Hide Menu</button>
<ui-view></ui-view>
<ul ng-class="{showMenu: show, hideMenu: !show}">
<li ng-repeat="letter in ['a','b','c','d']">{{letter}}</li>
</ul>
</body>
With this JS:
app.controller('MainCtrl', function($scope) {
$scope.show = false;
$scope.toggleMenu = function() {
$scope.show = !$scope.show;
};
});
Given the following:
<div ng-app="interactive">
<main ng-controller="RecipesController">
<ul>
<li ng-repeat="option in options">
<ul decisionIndex="{{ value }}">
<li>Edit {{ option.name }}</li>
<li>Choose {{ option.name }}</li>
<li>Delete {{ option.name }}</li>
</ul>
</li>
</ul>
</main>
</div>
How can I use $watch to detect whether "value" (is either 0, 1 or 2) changes?
Do I need to use $watchGroup ? As far as I know that only works if you have multiple attributes which are not the same.
I found this working with directives and isolated scopes, but it does not quite match my case and I would prefer not using directives. Is it possible using isolated scopes without directives? Or how can I watch for changes of an attribute-value occuring multiple times?
EDIT:
This is how I tried using $watch
app.controller('RecipesController', ['$scope', function ($scope) {
$scope.$watch('value', function () {
console.log('value: ' + $scope.value);
});
}]);
<div ng-app="myApp" ng-controller="myCtrl">
<input type="text" ng-model="value">
<p>Current value is: {{value}}</p>
<ul>
<li ng-repeat="option in options">
<ul decisionIndex="{{value}}">
<li ng-click="setValue(0)">Edit {{option.name}}</li>
<li ng-click="setValue(1)">Choose {{option.name}}</li>
<li ng-click="setValue(2)">Delete {{option.name}}</li>
</ul>
</li>
</ul>
</div>
Controller:
angular.module('myApp', [])
.controller('myCtrl', ['$scope', function($scope) {
$scope.value = 0; //Set initial value, or just declare it;
$scope.options = [
{name: "Bob"},
];
$scope.setValue = function(a){
$scope.value = a;
}
$scope.$watch('value', function(newVal, oldVal){
console.log(newVal);
})
}]);
HTML:-
<div ng-controller="countryController">
{{name}}
<ul>
<li ng-repeat="country in countries">
{{ country.name }}
<ul ng-show="country.states.length > 0">
<li ng-repeat="state in country.states">
{{ state.name }}
</li>
</ul>
<input type="text" ng-model="newState">
<a href ng-click="addStateState(country)">Add </a>
{{newState}}
</li>
</ul>
</div>
When I key in newState model it appears in client side.
Now i try to get that value into controller and try to push in array of states, its unable to add into states array.
JS Controller:-
myApp.factory('countryService', function($http){
var baseUrl = 'services/'
return {
getCountries : function(){
return $http.get(baseUrl + 'getcountries.php');
}
};
});
myApp.controller('countryController', function($scope, countryService){
countryService.getCountries().success(function(data){
$scope.countries = data;
});
$scope.addStateState = function(country){
country.states.push({'name' : $scope.newState});
$scope.newState = "";
};
});
Your main issue is that your $scope.newState is not available inside $scope.newStateState function. It is bad practice to manipulate an object like $scope within a $scope function. In fact, you are creating multiple multiple objects that are not the same as the $scope that you inject; otherwise, the input boxes for two different countries should match.
Working Plunkr below.
http://plnkr.co/edit/HG3zWG?p=preview
JS:
angular.module('myApp',[])
.controller('countryController', function($scope){
$scope.countries = [
{ name: 'USA', states:[
{name: 'Virginia'},
{name: 'Utah'}
]
},
{ name: 'Brazil', states:[
{name: 'Pernabuco'}
]
}
];
$scope.addStateState = function(country, data){
country.states.push({'name' : data.newState});
data.newState = "";
};
});
HTML:
<div ng-controller="countryController">
{{name}}
<ul>
<li ng-repeat="country in countries">
{{ country.name }}
<ul ng-show="country.states.length > 0">
<li ng-repeat="state in country.states">
{{ state.name }}
</li>
</ul>
<input type="text" ng-model="data.newState" />
Add
{{data.newState}}
</li>
</ul>
</div>
When you are dealing with things like ng-repeat, ng-if, or ng-include, they each create a new scope. This means that when you try to bind to a primitive on the root level of that scope, it will get dereferences when you update the value. So, you need to put your primitives inside of an object. John Papa's style guide recommends making a "vm" property on your scope. vm stands for view model.
Here is a jsfiddle of how to use it.
http://jsfiddle.net/fbLycnpg/
vm.newState
how to write a service or factory for bootstrap tabs using angularJs.
I placed in one controller but need a common function(repeated code) for different controllers.
<ul class="nav nav-tabs">
<li data-ng-class="{active:tab===0}">
<a href ng-click="changeTab(0)"> <i class="fa fa-list"></i></a>
</li>
<li data-ng-class="{active:tab===1}">
<a href ng-click="changeTab(1)"><i class="fa fa-user"></i></a>
</li>
</ul>
<div data-ng-class="{activeTab:tab===0}" ng-show="isActiveTab(0)">
tab1
</div>
<div data-ng-class="{activeTab:tab===1}" ng-show="isActiveTab(1)">
tab2
</div>
controller
$scope.tab = 0;
$scope.changeTab = function(newTab){
$scope.tab = newTab;
};
$scope.isActiveTab = function(tab){
return $scope.tab === tab;
};
Managing tabs is a view concern. Rather than implementing a factory, I recommend creating two directives: tabContainer and tab. The tab directive registers itself with the parent tabContainer using the require attribute to access the parent directive's controller API.
Demo
Usage
<tab-container selected="tab2">
<tab name="tab1">tab1</tab>
<tab name="tab2">tab2</tab>
</tab-container>
Parent Directive
The parent directive publishes the following controller API that the child tab directives will access:
tabContainer controller
// registers this tab with the parent tabContainer
this.register = function(element) {
$scope.tabs.push(element);
}
// returns the selected tab object whose
// name property indicates which tab is active
this.getSelected = function() {
return $scope.selectedTab;
}
Child Directive
The tab directive is able to access the parent controller by requiring the parent directive in its directive definition, and accessing the parent directive's controller as the 4th argument to the tab directive's link function:
tab directive definition
scope: true,
require: '^tabContainer',
link: function(scope, element, attr, tabContainer) {
// set the tab so that it is visible in the tab directive's scope.
scope.tab = { name: attr.name, element:element};
scope.selectedTab = tabContainer.getSelected();
tabContainer.register(scope.tab);
}
The scope is set to true so that each tab will create its own child scope and not interfere with the scope of other tabs.
Template Files
For example purposes, the directive templates are embedded in the HTML:
<script type="text/ng-template" id="tabContainer.html">
<ul class="nav nav-tabs">
<li ng-repeat="tab in tabs" data-ng-class="{active:selectedTab.name===tab.name}">
<a href ng-click="changeTab(tab)"> <i class="fa fa-list">{{tab.name}}</i></a>
</li>
</ul>
<ng-transclude></ng-transclude>
</script>
<script type="text/ng-template" id="tab.html">
<div data-ng-class="{activeTab:selectedTab.name===tab.name}" ng-show="selectedTab.name === tab.name">
<ng-transclude></ng-transclude>
</div>
</script>
It is recommended to move these to dedicated HTML files.
Changing the Active Tab
The user is able to change the active tab by clicking the tab link. This is achieved by publishing a $scope function in the parent controller:
$scope.changeTab = function(tab) {
$scope.selectedTab.name = tab.name;
}
Creating a Tabs Module
The beauty of AngularJS and its pluggable modular architecture is that you can extend the AngularJS directive ecosystem, and have the directives work together seamlessly. For example, you could encapsulate the above tabs directive into a tabs module, and even use the ngRepeat directive to bind the tabs.
Demo
Controller
var app = angular.module('app',['tabs']);
app.controller('ctrl', function($scope) {
$scope.tabData = [
{ name: 'tab1', body: 'You selected tab1!'},
{ name: 'tab2', body: 'You selected tab2!'},
{ name: 'tab3', body: 'You selected tab3!'},
{ name: 'tab4', body: 'You selected tab4!'},
];
});
View
<div class="container" ng-controller="ctrl">
<tab-container selected="tab1">
<tab ng-repeat="tab in tabData" name="{{tab.name}}">{{ tab.body }} </tab>
</tab-container>
</div>
Hi I write it with out using any service or factory
see the example
<ul ng-init="tab = 1">
<li ng-class="{active:tab===1}">
<a href ng-click="tab = 1">Tab1</a>
</li>
<li ng-class="{active:tab===2}">
<a href ng-click="tab = 2">Tab2</a>
</li>
<li ng-class="{active:tab===3}">
<a href ng-click="tab = 3">Tab3</a>
</li>
<br><br>
<p ng-show="tab === 1"> Tab1 content </p>
<p ng-show="tab === 2"> Tab2 content</p>
<p ng-show="tab === 3"> Tab3 content</p>
</ul>
Dynamically change it through controller see the working example here
The structure for controllers/services in Angular are explained well here:
https://github.com/johnpapa/angular-styleguide
In app.js, we declare an angular application, give it a name, and any dependencies (ng-route / ng-grid). $http calls should be made using a factory or a service, and the controller should call the service to fetch or post data. From the angular documentation, "services are substitutable objects that are wired together using dependency injection (DI). You can use services to organize and share code across your app."
https://docs.angularjs.org/guide/services
app.js:
var app = angular.module('appname', []);
app.factory('httpResponseErrorInterceptor'...
app.config(['$httpProvider',...
Controller:
angular.module('appname').controller("NameCtrl", ["$scope", "$log", "$window", "$http", "$timeout", "SomeService",
function ($scope, $log, $window, $http, $timeout, TabService) {
//your controller code
$scope.tab = 0;
$scope.changeTab = function(newTab){
$scope.tab = newTab;
};
$scope.isActiveTab = function(tab){
return $scope.tab === tab;
};
}
]);
Service:
angular.module('appname').service("TabService", function () {
//Your code for shared functionality regarding tab service
var currentTab = {};
return {
currentTab : currentTab
}
});
I have a simple list item being parsed with ng-repeat:
<ul>
<li ng-repeat="item in items" class="commonClass" ng-class="{'on': on_var}" ng-click="on_var=!on_var">
{{item.name}}
<li>
</ul>
clicking on a list-item will add the class name 'on' as expected. but I want to remove all other 'on' classes as soon as you click on another list-item and only add it to the one clicked. I come from a jQuery background and I am new to angular. All I want to do is something like this:
$("li.commanClass").click(function(){
$("li.commonClass").removeClass('on');
$(this).addClass('on');
})
I want to know what is the "angular way" of achieving this result
jsfiddle
Thanks.
In angular you want to pass object references to child scopes as much as possible. This way you can use prototypical object inheritance that can branch down many levels.
Think of a scope as being a model. In the case of ng-repeat it creates a child scope for each element. So if the parent scope holds a model it will be passed as reference to the child scopes. Each of these child scopes will hold a reference to the parent scope model object.
Thus you can do:
<li ng-repeat="item in model.items"
ng-class="{'on': model.selected==item}"
ng-click="model.selected=item">{{ item.name }}</li>
Then in controller:
$scope.model = {
selected: null,
items = [
{name: "Apple"},
{name: "Banana"},
{name: "California"}
]
};
Try to avoid using functions as above answer does. These functions will get called many times and will add unnecessary extra overhead.
Valuable post to read: "Thinking in AngularJS" if I have a jQuery background?
DEMO
You can add a variable to your scope to maintain which item is selected, and a function on your scope that toggles the variable.
Controller:
app.controller('myCtrl', function($scope) {
$scope.items =
[
{name: "Apple"},
{name: "Banana"},
{name: "California"}
]
$scope.selectItem = function( item ) {
$scope.selectedItem = item;
};
})
HTML:
<div ng-app="myApp">
<ul ng-controller="myCtrl">
<li ng-repeat="item in items" class="commonClass" ng-class="{'on': selectedItem === item}" ng-click="selectItem(item)">
{{ item.name }}
</li>
</ul>
</div>
Fiddle coming at ya of jsparks answer:
http://jsfiddle.net/eHDTF/
See fiddle for code!
I think you should refer a directive for whole your project instead of controller.
<div class="nav-item">
<ul>
<li active-me="on">Item 1</li>
<li active-me="on">Item 2</li>
<li active-me="on">Item 3</li>
<li active-me="on">Item 4</li>
<li active-me="on">Item 5</li>
</ul>
</div>
Then create activeMe directive:
angular.module('app').directive('activeMe', function(){
return {
restrict: 'A',
scope: {
activeMe: '#'
},
link: function(scope, element, attrs) {
element.bind('click', function() {
if (scope.activeMe !== undefined && scope.activeMe.trim().length > 0) {
element.parent().children().removeClass(scope.activeMe);
element.addClass(scope.activeMe);
} else {
element.parent().children().removeClass('active');
element.addClass('active');
}
});
}
};
});