AngularJS sort rows by table header:-
Here is what we want to do:-
Example:-
Demo.js
var app = angular
.module("myModule", [])
.controller("myController", function ($scope) {
var employees = [
{
name: "Santosh Kumar Singh", dateOfBirth: new Date("Oct 05, 1991"),
gender: "Male", salary: 55000
},
{
name: "Lakshmi Pati Ojha", dateOfBirth: new Date("March 11, 1989"),
gender: "Male", salary: 70000
},
{
name: "Reena", dateOfBirth: new Date("August 15, 1990"),
gender: "Female", salary: 57000
},
{
name: "Chandan Kumar", dateOfBirth: new Date("October 03, 1991"),
gender: "Male", salary: 45000
},
{
name: "Shobha", dateOfBirth: new Date("December 31, 1987"),
gender: "Female", salary: 67000
}
];
$scope.employees = employees;
$scope.sortColumn = "name";
$scope.reverseSort = false;
$scope.sortData = function (column) {
$scope.reverseSort = ($scope.sortColumn == column) ?
!$scope.reverseSort : false;
$scope.sortColumn = column;
}
$scope.getSortClass = function (column) {
if ($scope.sortColumn == column) {
return $scope.reverseSort
? 'arrow-down'
: 'arrow-up';
}
return '';
}
});
Explanation of Demo.js:-
Demo.html :-
sortData() function is called when any table header is clicked, passing the name of the column by which the data should be sorted. The div element's, ng-class directive calls getSortClass() function, which returns the CSS class to be applied. The CSS displays the UP or DOWN arrow depending on the sort direction. Finally, with the orderBy filter sortColumn and reverseSort properties of the $scope object are used to control the column by which the data should be sorted and the sort direction.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="angular.min.js"></script>
<script src="Demo.js"></script>
<style>
body {
font-family: Arial;
}
table {
border-collapse: collapse;
}
td {
border: 1px solid black;
padding: 5px;
}
th {
border: 1px solid black;
padding: 5px;
text-align: left;
/*cursor property displays hand symbol
when hovered over the th element*/
cursor: pointer;
}
/*This class displays the UP arrow*/
.arrow-up {
width: 0;
height: 0;
border-left: 5px solid transparent;
border-right: 5px solid transparent;
border-bottom: 10px solid black;
display:inline-block;
}
/*This class displays the DOWN arrow*/
.arrow-down {
width: 0;
height: 0;
border-left: 5px solid transparent;
border-right: 5px solid transparent;
border-top: 10px solid black;
display:inline-block;
}
</style>
</head>
<body ng-app="myModule">
<h3> AngularJS sort rows by table header Demo by santosh-asp.com: </h3>
<div ng-controller="myController">
<table>
<thead>
<tr>
<th ng-click="sortData('name')">
Name <div ng-class="getSortClass('name')"></div>
</th>
<th ng-click="sortData('dateOfBirth')">
Date of Birth <div ng-class="getSortClass('dateOfBirth')"></div>
</th>
<th ng-click="sortData('gender')">
Gender <div ng-class="getSortClass('gender')"></div>
</th>
<th ng-click="sortData('salary')">
Salary <div ng-class="getSortClass('salary')"></div>
</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="employee in employees | orderBy:sortColumn:reverseSort">
<td> {{ employee.name }} </td>
<td> {{ employee.dateOfBirth | date:"dd/MM/yyyy" }} </td>
<td> {{ employee.gender }} </td>
<td> {{ employee.salary }} </td>
</tr>
</tbody>
</table>
</div>
</body>
</html>
Run the application and get output as expected.
- The data should be sorted when the table column header is clicked
- The user should be able to sort in both the directions - ascending and descending. Clicking on the column for the first time should sort the data in ascending order. Clicking on the same column again should sort in descending order.
- An icon should be displayed next to the column showing the sort column and direction
Example:-
Demo.js
Explanation of Demo.js:-
- Sets up the model
- sortColumn and reverseSort properties are attached to the $scope object. These 2 properties are used to control the column by which the data should be sorted and the sort direction.
- sortColumn is set to name and reverseSort is set to false. This will ensure that when the form is initially loaded, the table data will be sorted by name column in ascending order.
- Depending on the column header the user has clicked, sortData() function sets the sortColumn and reverseSort property values.
- Based on the sort column and the sort direction, getSortClass() function returns the CSS class name to return. The CSS class controls the sort icon that will be displayed next to the sort column.
Demo.html :-
sortData() function is called when any table header is clicked, passing the name of the column by which the data should be sorted. The div element's, ng-class directive calls getSortClass() function, which returns the CSS class to be applied. The CSS displays the UP or DOWN arrow depending on the sort direction. Finally, with the orderBy filter sortColumn and reverseSort properties of the $scope object are used to control the column by which the data should be sorted and the sort direction.
Run the application and get output as expected.