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My single page application which is implemented using AngularJS is taking long time to load the page

I am working on the Single page application and using AngularJS. In my application, all DOM elements get loads using ajax and due to this I have used number of ng-repeat and binding expression and this is the reason my page is taking long time to load the page. Please help to solve my issue.
app
angular.module('tabApp', []);
Service
angular.module('tabApp')
.service('mrcService', ['$http', function($http) {
this.categories = [];
this.getCategories = function() {
return $http({
method: "GET",
url: 'mrcdata.aspx'
}).success(function(data) {
categories = data;
return categories;
});
};
}]);
Controller
angular.module('tabApp')
.controller('dynamicContentCtrl', ['$scope', 'mrcService', function($scope, mrcService) {
$scope.categories = [];
mrcService.getCategories().then(function(response) {
$scope.categories = response.data.Categories;
});
}]);
HTML code
<div class="main-content container" ng-controller="dynamicContentCtrl">
<div ng-controller="desktopTabCtrl" class="row desktop-content">
<div class="col-md-3 col-sm-4 category-items">
<nav class="nav categories-nav">
<ul class="categories">
<li ng-repeat="category in categories" class="category" ng-class="{ active: isSet(category.CategoryRank) }">
<a href="javascript:void(0)" ng-click="setTab(category.CategoryRank)" class="text">
<span>{{category.CategoryTitle}}</span>
</a>
<span class="arrow-right"></span>
</li>
<li class="category static">
<C5:LocalLiteral runat="server" Text="mrc.home.learnmoretab"/>
</li>
</ul>
</nav>
</div>
<div class="col-md-9 col-sm-8 document-tiles">
<div ng-repeat="category in categories" ng-show="isSet(category.CategoryRank)" class="tile-container">
<div class="row">
<div ng-repeat="document in category.Documents" class="col-md-6 col-sm-6 tile">
<div class="tile-content row">
<div class="col-md-12 col-sm-12">
<div class="thumbNail-content col-md-6 col-sm-6">
<p class="title">{{document.DocumentTitle}}</p>
<p class="audience">{{document.Audience}}</p>
</div>
<div class="thumbNail-image col-md-6 col-sm-6">
<img alt="Thumb Nail" src="{{document.ThumbnailUrl}}">
</div>
</div>
<div class="col-md-12 col-sm-12">
<div class="download-section">
<select class="lang-dropdwn"
ng-model="document.DefaultDialectId"
ng-change="selectLang(document , document.LocalizedDocuments , document.DefaultDialectId )">
<option ng-repeat="localizedDocument in document.LocalizedDocuments"
value="{{localizedDocument.DialectId}}">
{{localizedDocument.LanguageName}}
</option>
</select>
</div>
<div class="button-conatiner" ng-init="document.DownloadLink = document.DocumentId +':'+document.DefaultLocalizedDocumentId">
<a class="button" href="documentdownloader.aspx?documentid={{document.DownloadLink}}"><C5:LocalLiteral runat="server" Text="basket.esddelivery"/></a>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>

Here's a few options you can try to improve performance.
1. You should set the track by in the ng-repeats
To minimize creation of DOM elements, ngRepeat uses a function to "keep track" of all items in the collection and their corresponding DOM elements. For example, if an item is added to the collection, ngRepeat will know that all other items already have DOM elements, and will not re-render them.
The default tracking function (which tracks items by their identity) does not allow duplicate items in arrays. This is because when there are duplicates, it is not possible to maintain a one-to-one mapping between collection items and DOM elements.
If you do need to repeat duplicate items, you can substitute the default tracking behavior with your own using the track by expression.
For example, you may track items by the index of each item in the collection, using the special scope property $index.
Example:
<div ng-repeat="item in items track by $index">{{item.name}}</div>
2. You could use one way data binding to items you know wont be changed. This will disable the watchers for those items and improve performance. Example:
Instead of this
{{item.name}}
Use this
{{::item.name}}
Please remember that this is a one way binding and these values will not be updated if something changes in your scope but you will need to manually update it.
3. Try to limit the ng-show and ng-hide attributes since this will add more watchers and leads to poor performance.

how to delete object in an array with filter used? AngularJS

I have something like an input to add items into either column 1 or column 2 and each time adding the items, the column will show up what is added right away with an 'X' beside it so if you want to delete the item just click on 'X'. At first I wasn't thinking much so I used an easy way to remove the HTML but then I realized, that's just removing the HTML (There's also a search input if I type something into search and clear the search, all items will show again). This is when I realized just removing the HTML is a mistake that I need to remove the object too but how can I make it so it'll delete the right object in the array?
My angular script
angular.module("addItemApp", [])
.controller("toDoCtrl", function ($scope) {
$scope.items = [];
$scope.addItem = function (item) {
console.log(item);
$scope.items.push(angular.copy(item));
console.log($scope.items);
};
$scope.remove = function (item) {
var index = $scope.items.indexOf(item);
$scope.items.splice(index, 1);
}
});
my html
<div class="row">
<div class="col-xs-6 col-sm-4 left-column">
<div class="input-item">
<input type="text" placeholder="Enter Item" ng-model="item.name" class="enter-item">
<select class="column-select" ng-model="item.pos">
<option value="default" selected>Choose Column</option>
<option value="column1">Column 1</option>
<option value="column2">Column 2</option>
</select>
<button class="add-button" type="button" ng-click="addItem(item)">Add Item</button>
</div>
<div class="search-item">
<label for="search">Search An Item</label>
<div class="search-input">
<input ng-model="query" type="text" placeholder="Search" id="search"><span class="fa fa-search icon-search"></span>
</div>
</div>
</div>
<div class="col-xs-6 col-sm-4">
<h3 class="column-header column1">
Column 1
</h3>
<ul ng-repeat="item in items | filter:{ pos: 'column1' } | filter:query">
<li>{{item.name}}
<button remove-on-click ng-click="remove()" class="remove-button fa fa-times"></button>
</li>
</ul>
</div>
<!-- Optional: clear the XS cols if their content doesn't match in height -->
<div class="clearfix visible-xs-block"></div>
<div class="col-xs-6 col-sm-4">
<h3 class="column-header column2">
Column 2
</h3>
<ul ng-repeat="item in items | filter:{ pos: 'column2' } | filter:query">
<li>{{item.name}}
<button remove-on-click ng-click="remove()" class="remove-button fa fa-times"></button>
</li>
</ul>
</div>
</div>
Thanks in advance everyone.

you can do it in two ways -
1
$scope.remove = function(item) {
var index = $scope.items.indexOf(item);
$scope.items.splice(index, 1);
}
<button ng-click="remove(item)"></button>
2
$scope.remove = function(index) {
$scope.items.splice(index, 1);
}
<button ng-click="remove($index)"></button>
Please note that, when filter is applied, the $index may not be the one you should use to remove, better go with first approach. I have given example of $index for your reference.

<button ng-click="remove(item)"></button>
should work, since item is defined earlier in the ng-repeat and you already have a remove function defined on your $scope.

How to get parent's parent's parent's id in Angularjs

I have a problem. I need to know how to get grandparent's ID in AngularJS.
I need "{{parent}}" to become "grand-parent".
(it should be <div id="me-and-my-grand-parent">)
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
var pid = document.getElementsByClassName("i-am-a-child");
var pid = this.parentNode.id;
if (this.parentNode&&this.parentNode.id)
var pid=this.parentNode.id;
$scope.parent = var pid;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myCtrl">
<div id="grand-parent{{$index}}" ng-repeat="item in items">
<div>
<div>
<div id="me-and-my-{{parent}}" class="i-am-a-child">
</div>
</div>
</div>
</div>
</div>
My actual code
<li ng-repeat="project in projects" ng-class="{active: project.childToggle, '': !project.childToggle,hasChild: project.children.length > 0 }" ng-dblclick="childToggleCt(project)" id="project-{{$index}}">
<div class="project-overview">
<header class="clearfix flip-area">
<span ng-if="!project.inCart" class="status dropdown-button warning pull-left" id="id-{{ParentIdShow}}" data-intro="Status bar" data-position="right">Pending</span>
And for now JS was like tis :
$scope.ParentIdShow = function(obj)
{
alert(obj.target.parentNode.parentNode.parentNode.id);
}

The answer to these types of "parent of my parent of my parent of my..." is to use the controller as syntax. Read more about it here. In short, it lets you do stuff like
<div ng-controller="ctrl1 as first">
<div ng-controller="ctrl2 as second">
...
<div ng-controller="ctrlN as Nth">
<div ng-repeat="i in arr">
{{first.property}}
{{second.otherProperty}}
{{Nth.nProperty}}
Note how you dont need any parent calls.

Angular JS - Need to apply different filter (for a table) depending upon different drop downs on page

I'm having three different sets of drop downs and also search box to apply filter for a table. My table should filter if someone enters text in textbox (or) depending on the value selected in one of the three drop downs (textbox searches and drop down searches are exclusive of each other).
This is my HTML:
<div ng-app="myModule" ng-controller="myController">
<nav class="navbar navbar-default" role="navigation">
<div class="container-fluid">
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<form class="navbar-form navbar-left form-horizontal" role="search">
<div class="form-group">
<label for="searchSeries" class="control-label">Find:</label>
<input type="text" id="searchSeries" ng-model="searchText" class="form-control" placeholder="Search TV Series" />
<div class="btn-group btn-input clearfix">
<button type="button" class="btn btn-default dropdown-toggle form-control" data-toggle="dropdown"> <span data-bind="label">Select One</span> <span class="caret"></span> </button>
<ul class="dropdown-menu" role="menu">
<li>Action</li>
<li>Animation</li>
<li>Comedy</li>
<li>Fantasy</li>
<li>Drama</li>
<li>Mystery</li>
<li>Romance</li>
<li>Science Fiction</li>
<li>Mini Series</li>
<li>Reality</li>
<li>Documentary</li>
<li>Crime</li>
<li>Game Show</li>
<li>Talk Show</li>
<li>Adventure</li>
<li>Home and Garden</li>
<li>Thriller</li>
<li>Sport</li>
<li>Family</li>
<li>Children</li>
<li>News</li>
<li>Horror</li>
</ul>
</div>
<select ng-model="properties.config" ng-options="prop.value as prop.name for prop in properties.configs">
</select>
<select ng-model="order.config" ng-options="template.value as template.name for template in order.configs">
</select>
</div>
</form>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container-fluid -->
</nav>
<div class="container-fluid">
<div class="table-responsive">
<table class="table table-bordered">
<tbody>
<tr ng-repeat="user in users[0].tvseries | filter: searchText | filter: order.config | filter:properties.config">
<td><img ng-src="{{user.thumbnail}}" alt="" /></td>
<td><div>{{user.tv_show_name}}</div>
<div>{{user.brief_description}}</div>
<div>{{user.rating}}</div></td>
<td><div>{{user.show_time}}</div>
<div>{{user.genre}}</div>
<div>{{user.current_season}}</div>
<div>{{user.current_episode}}</div></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
My controllers.js:
var myModule = angular.module('myModule', []);
myModule.controller('myController', function($scope, userRepository) {
userRepository.getAllUsers().success(function(users) {$scope.users = users;});
$scope.order = {};
$scope.properties = {};
//Configuration
$scope.order.configs = [
{'name': 'Ascending',
'value': 'tv_show_name'},
{'name': 'Descending',
'value': '-tv_show_name'}
];
$scope.properties.configs = [
{'name': 'Show Time',
'value': 'show_time'},
{'name': 'Rating',
'value': 'rating'}
];
//Setting first option as selected in configuration select
$scope.order.config = $scope.order.configs[0].value;
$scope.properties.config = $scope.properties.configs[0].value;
});
myModule.factory('userRepository', function($http) {
return {
getAllUsers: function() {
var url = "https://api.mongolab.com/api/1/databases/tvshowsdb/collections/tvshowsdbcollections?apiKey=e2SbmkVmLOQN-wH_ga84n9prYsgU8lQ5";
return $http.get(url);
}
};
});
Note that: when I apply "filter: searchText" in my html, it works fine and I face no issue. But when I try to apply two more filters "filter: order.config | filter:properties.config", my code doesn't execute. Please help me understand where I'm going wrong :(

Because you are adding and removing - before tv_show_name, I think that you are trying to sort the results by multiple fields? If that is the case, the syntax would be:
orderBy: [order.config, properties.config].
Here is a demo: http://plnkr.co/edit/yLYQGYGcGZMqoj6yfqoT?p=preview
Note: the demo is reading from a json file, instead of the mongolab api, because I needed to add duplicate names and start times, to show the effects of multi-level sorting. Also, notice that I changed the order of the selects to match the order in which you were applying the filters. I think it is intuitive that the first select take precedence over the next select.
Update
If you only want to sort by one of the options at a time, you can use a string variable, much like the orderBy api demo:
<div ng-click="predicate = 'tv_show_name'">Show Name ascending</div>
<div ng-click="predicate = '-tv_show_name'">Show Name descending</div>
<div ng-click="predicate = 'show_time'">Show Time</div>
<div ng-click="predicate = 'rating'">Rating</div>
...
<tr ng-repeat="user in users[0].tvseries | filter: searchText | orderBy:predicate">
Here is the updated Demo

multidimensional array in angular

I have a multidimensional array from an API. Is it possible to programatically loop through the array?
{
success: true,
categories: [{
cat_id: "2",
name: "This is category One",
description: null,
photo_url: "/img/test.png",
order: "1",
items: [{
item_id: "1",
title: "Desk",
item_url: "/690928460",
photo_url: "/desk.png",
}, {
item_id: "2",
title: "Chair",
item_url: "/18882823",
photo_url: "/chair.png",
},
}]
}]
}
My controller looks like this:
myApp.controller('items', function($scope, $http, $location, Data) {
var apiUrl = '/api/items';
$http.get(apiUrl).
success(function(data) {
$scope.data = Data;
$scope.allData = data;
});
$scope.changeView = function(view) {
$location.path(view);
}
});
Angular index file just has: <div ng-view=""></div>
View file
<div class="scrollable categories-container animated-fast slideInUp">
<div class="container categories">
<div class="row" ng-repeat="categories in allData">
<div class="col-xs-6" ng-repeat="category in categories">
<div class="items">
<div class="title">
{{ category.name }}
</div>
</div>
</div>
</div>
</div>
</div>
I can loop through the category names fine, but when trying to return items for EACH category I don't understand the logic behind it...

I would suggest some simple nested for loops, as for each gives rise to more complexity.
As I'm not sure what you want to do with the data let's just create an array of all item names and one of all category names:
Within your success function:
var items = [], categories = []
for(var i = 0; i < data.categories.length;i++){
categories.push(data.categories[i].name);
for(var j = 0; j < data.categories[i].items.length;j++){
items.push(data.categories[i].items[j].name);
}
}
console.log(categories);
console.log(items);
EDIT:
Completely missed your html code somehow, here is my solution:
<div class="scrollable categories-container animated-fast slideInUp">
<div class="container categories">
<div class="col-xs-6" ng-repeat="category in allData.categories">
<div class="items">
<div class="title">
{{ category.name }}
</div>
</div>
</div>
</div>
</div>
EDIT 2:
As to your comment:
If you want to select the secondary view's contents(ie the items) based on the selection of a category I would suggest a ng-click attribute. A directive could be used but isn't necessary:
<div class="scrollable categories-container animated-fast slideInUp">
<div class="container categories">
<div class="col-xs-6" ng-repeat="category in allData.categories">
<div class="title" ng_click="selected_category = category">
{{ category.name }}
</div>
</div>
<div class="col-xs-6" ng-repeat="item in selected_category.items">
<div class="title">
{{ item.name }}
</div>
</div>
</div>
</div>
So when your categories data is loaded the first ng-repeat is populated with the categories. Each div with class title will have a function called on click which will make the selected_category object equal the selected category.
This will then cause the second view to be populated with all the items in the selected category by Angular's two way bind.