Web Front-endJS TutorialDetailed explanation of the use of custom directives in AngularJS_AngularJS
Use AngularJS to extend the functionality of HTML in custom instructions. Functional definition of the "command" used by the custom directive. The custom directive simply replaces the element it is activated on. During the bootstrapping process the AngularJS application finds the matching element and prepares an activity using the custom directive's compile() method before processing the element using the directive's scope-based custom directive's link() method. AngularJS provides support for creating custom directives based on the following element types.
- Element directives - Directives that activate a matching element when encountered.
- Attribute - - Activates a matching attribute when the directive is encountered.
- CSS - - Activate matching CSS styles when the directive is encountered.
- Comment - - Activates the matching comment when the command is encountered.
Learn about custom directives
Define custom HTML tags.
<student name="Mahesh"></student><br/> <student name="Piyush"></student>
Define custom directives to handle the custom HTML tags above.
var mainApp = angular.module("mainApp", []);
//Create a directive, first parameter is the html element to be attached.
//We are attaching student html tag.
//This directive will be activated as soon as any student element is encountered in html
mainApp.directive('student', function() {
//define the directive object
var directive = {};
//restrict = E, signifies that directive is Element directive
directive.restrict = 'E';
//template replaces the complete element with its text.
directive.template = "Student: <b>{{student.name}}</b> , Roll No: <b>{{student.rollno}}</b>";
//scope is used to distinguish each student element based on criteria.
directive.scope = {
student : "=name"
}
//compile is called during application initialization. AngularJS calls it once when html page is loaded.
directive.compile = function(element, attributes) {
element.css("border", "1px solid #cccccc");
//linkFunction is linked with each element with scope to get the element specific data.
var linkFunction = function($scope, element, attributes) {
element.html("Student: <b>"+$scope.student.name +"</b> , Roll No: <b>"+$scope.student.rollno+"</b><br/>");
element.css("background-color", "#ff00ff");
}
return linkFunction;
}
return directive;
});
Define a controller to update the scope as a directive. Here, we use the name attribute value as the scope of the child.
mainApp.controller('StudentController', function($scope) {
$scope.Mahesh = {};
$scope.Mahesh.name = "Mahesh Parashar";
$scope.Mahesh.rollno = 1;
$scope.Piyush = {};
$scope.Piyush.name = "Piyush Parashar";
$scope.Piyush.rollno = 2;
});
Example
<html>
<head>
<title>Angular JS Custom Directives</title>
</head>
<body>
<h2 id="AngularJS-Sample-Application">AngularJS Sample Application</h2>
<div ng-app="mainApp" ng-controller="StudentController">
<student name="Mahesh"></student><br/>
<student name="Piyush"></student>
</div>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.min.js"></script>
<script>
var mainApp = angular.module("mainApp", []);
mainApp.directive('student', function() {
var directive = {};
directive.restrict = 'E';
directive.template = "Student: <b>{{student.name}}</b> , Roll No: <b>{{student.rollno}}</b>";
directive.scope = {
student : "=name"
}
directive.compile = function(element, attributes) {
element.css("border", "1px solid #cccccc");
var linkFunction = function($scope, element, attributes) {
element.html("Student: <b>"+$scope.student.name +"</b> , Roll No: <b>"+$scope.student.rollno+"</b><br/>");
element.css("background-color", "#ff00ff");
}
return linkFunction;
}
return directive;
});
mainApp.controller('StudentController', function($scope) {
$scope.Mahesh = {};
$scope.Mahesh.name = "Mahesh Parashar";
$scope.Mahesh.rollno = 1;
$scope.Piyush = {};
$scope.Piyush.name = "Piyush Parashar";
$scope.Piyush.rollno = 2;
});
</script>
</body>
</html>
Results
Open textAngularJS.html in your web browser. See the results as follows:
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使用PHP和AngularJS开发一个在线文件管理平台，方便文件管理Jun 27, 2023 pm 01:34 PM随着互联网的普及，越来越多的人在使用网络进行文件传输和共享。然而，由于各种原因，使用传统的FTP等方式进行文件管理无法满足现代用户的需求。因此，建立一个易用、高效、安全的在线文件管理平台已成为了一种趋势。本文介绍的在线文件管理平台，基于PHP和AngularJS，能够方便地进行文件上传、下载、编辑、删除等操作，并且提供了一系列强大的功能，例如文件共享、搜索、
如何使用PHP和AngularJS进行前端开发May 11, 2023 pm 05:18 PM随着互联网的普及和发展，前端开发已变得越来越重要。作为前端开发人员，我们需要了解并掌握各种开发工具和技术。其中，PHP和AngularJS是两种非常有用和流行的工具。在本文中，我们将介绍如何使用这两种工具进行前端开发。一、PHP介绍PHP是一种流行的开源服务器端脚本语言，它适用于Web开发，可以在Web服务器和各种操作系统上运行。PHP的优点是简单、快速、便
如何在PHP编程中使用AngularJS？Jun 12, 2023 am 09:40 AM随着Web应用程序的普及，前端框架AngularJS变得越来越受欢迎。AngularJS是一个由Google开发的JavaScript框架，它可以帮助你构建具有动态Web应用程序功能的Web应用程序。另一方面，对于后端编程，PHP是非常受欢迎的编程语言。如果您正在使用PHP进行服务器端编程，那么结合AngularJS使用PHP将可以为您的网站带来更多的动态效
使用Flask和AngularJS构建单页Web应用程序Jun 17, 2023 am 08:49 AM随着Web技术的飞速发展，单页Web应用程序（SinglePageApplication,SPA）已经成为一种越来越流行的Web应用程序模型。相比于传统的多页Web应用程序，SPA的最大优势在于用户感受更加流畅，同时服务器端的计算压力也大幅减少。在本文中，我们将介绍如何使用Flask和AngularJS构建一个简单的SPA。Flask是一款轻量级的Py
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