AngularJS自定義指令
自定義指令中使用AngularJS擴展HTML的功能。自定義指令使用的「指令」的功能定義。自定義指令只是替換了它被激活的元素。引導過程中AngularJS應用程序找到了匹配的元素，並做好使用自定義指令compile()方法一次活動再處理使用基於指令的範圍自定義指令link()方法的元素。 AngularJS提供支持，以下列元素的類型來創建自定義指令。
Element directives - 指令遇到時激活一個匹配的元素。
Attribute - - 指令遇到時激活一個匹配的屬性。
CSS - - 指令遇到時激活匹配CSS樣式。
Comment - - 指令遇到時激活匹配的註釋。
瞭解自定義指令
定義自定義的HTML標籤。
<student name="Mahesh">
<student name="Piyush">
定義自定義指令來處理上面的自定義HTML標籤。
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: {{student.name}} , Roll No: {{student.rollno}}"; //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($scope, element, attributes) { element.html("Student: "+$scope.student.name +" , Roll No: "+$scope.student.rollno+"
"); element.css("background-color", "#ff00ff"); } return linkFunction; } return directive; });
定義控制器以更新範圍爲指令。在這裏，我們使用name屬性值作爲子的作用域。
mainApp.controller('StudentController', function($scope) { $scope.Mahesh = {}; $scope.Mahesh.name = "Mahesh Parashar"; $scope.Mahesh.rollno = 1; $scope.Piyush = {}; $scope.Piyush.name = "Piyush Parashar"; $scope.Piyush.rollno = 2; });
例子
AngularJS Sample Application
結果
在Web瀏覽器中打開textAngularJS.html。看到結果如下：
