自訂指令中使用AngularJS擴充HTML的功能。自訂指令使用的“指令”的功能定義。自訂指令只是替換了它被啟用的元素。引導過程中AngularJS應用程式找到了匹配的元素，並做好使用自訂指令compile()方法一次活動再處理使用基於指令的範圍自訂指令link()方法的元素。 AngularJS提供支援，以下列元素的類型來建立自訂指令。
Element directives - 指令遇到時啟用一個匹配的元素。
Attribute - - 指令遇到時啟用一個匹配的屬性。
CSS - - 指令遇到時啟用匹配CSS樣式。
Comment - - 指令遇到時啟用匹配的注釋。
瞭解自訂指令
定義自訂的HTML標籤。
<student name="Mahesh"></student><br/>
<student name="Piyush"></student>
定義自訂指令來處理上面的自訂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 htmlmainApp.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>"+$scope.student.rollno+"</b><br/>"); element.css("background-color", "#ff00ff"); } return linkFunction; } return directive;});
定義控制器以修改範圍為指令。在這裡，我們使用name屬性值作為子的範圍。
mainApp.controller('StudentController', function($scope) { $scope.Mahesh = {}; $scope.Mahesh.name = "Mahesh Parashar"; $scope.Mahesh.rollno = 1; $scope.Piyush = {}; $scope.Piyush.name = "Piyush Parashar"; $scope.Piyush.rollno = 2;});
例子
<html><head> <title>Angular JS Custom Directives</title></head><body> <h2>AngularJS Sample Application</h2> <div ng-app="mainApp" ng-controller="StudentController"><student name="Mahesh"></student><br/><student name="Piyush"></student> </div> <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.min.js"></script> <script> var mainApp = angular.module("mainApp", []); mainApp.directive('student', function() { var directive = {}; directive.restrict = 'E'; directive.template = "Student: <b>{{student.name}}</b> , Roll No: <b>{{student.rollno}}</b>"; directive.scope = { student : "=name" } directive.compile = function(element, attributes) { element.css("border", "1px solid #cccccc"); var linkFunction = function($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>
結果
在Web瀏覽器中開啟textAngularJS.html。看到結果如下：
以上就是對AngularJS的自訂指令資料整理，後續繼續補充，謝謝大家對本站的支援！
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