Part 8 AngularJS filters

Filters in angular can do 3 different things
1. Format data
2. Sort data
3. Filter data

Filters can be used with a binding expression or a directive
To apply a filter use pipe (|) character
Syntax : {{ expression | filterName:parameter }}

Angular filters for formatting data

Filter	Description
lowercase	Formats all characters to lowercase
uppercase	Formats all characters to uppercase
number	Formats a number as text. Includes comma as thousands separator and the number of decimal places can be specified
currency	Formats a number as a currency. $ is default. Custom currency and decimal places can be specified
date	Formats date to a string based on the requested format

Angular Date formats

Format	Result
yyyy	4 digit year. Exampe 1998
yy	2 digit year. Example 1998 => 98
MMMM	January - December
MMM	Jan - Dec
MM	01 - 12
M	1 - 12 (No leading ZEROS)
dd	01 - 31
d	1 - 31 (No leading ZEROS)

Angular date format documentation
https://docs.angularjs.org/api/ng/filter/date

limitTo filter : Can be used to limit the number of rows or characters in a string.
Syntax : {{ expression | limitTo : limit : begin}}

The following example uses all the above filters
Script.js

 var app = angular

        .module("myModule", [])

        .controller("myController", function ($scope) {

            var employees = [

                {

                    name: "Ben", dateOfBirth: new Date("November 23, 1980"),

                    gender: "Male", salary: 55000.788

                },

                {

                    name: "Sara", dateOfBirth: new Date("May 05, 1970"),

                    gender: "Female", salary: 68000

                },

                {

                    name: "Mark", dateOfBirth: new Date("August 15, 1974"),

                    gender: "Male", salary: 57000

                },

                {

                    name: "Pam", dateOfBirth: new Date("October 27, 1979"),

                    gender: "Female", salary: 53000

                },

                {

                    name: "Todd", dateOfBirth: new Date("December 30, 1983"),

                    gender: "Male", salary: 60000

                }

            ];

            $scope.employees = employees;

            $scope.rowCount = 3;

        });

HtmlPage1.html

 <!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

    <title></title>

    <script src="Scripts/angular.min.js"></script>

    <script src="Scripts/Script.js"></script>

    <link href="Styles.css" rel="stylesheet" />

</head>

<body ng-app="myModule">

    <div ng-controller="myController">

        Rows to display : <input type="number" step="1"

                                 ng-model="rowCount" max="5" min="0" />

        <br /><br />

        <table>

            <thead>

                <tr>

                    <th>Name</th>

                    <th>Date of Birth</th>

                    <th>Gender</th>

                    <th>Salary (number filter)</th>

                    <th>Salary (currency filter)</th>

                </tr>

            </thead>

            <tbody>

                <tr ng-repeat="employee in employees | limitTo:rowCount">

                    <td> {{ employee.name | uppercase }} </td>

                    <td> {{ employee.dateOfBirth | date:"dd/MM/yyyy" }} </td>

                    <td> {{ employee.gender }} </td>

                    <td> {{ employee.salary | number:2 }} </td>

                    <td> {{ employee.salary | currency : "£" : 1 }} </td>

                </tr>

            </tbody>

        </table>

    </div>

</body>

</html>

Styles.css

 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;

}

巴特西

Part 8 AngularJS filters

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