Guide to using $attrs method in angularJS_AngularJS

Here is an example of using the $attrs method in angularJS:

Copy code The code is as follows:

   
       
       
       
       
   
   
       

            a_directive
       

       

           

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            这里
       

        <script><br /> var app = angular.module('Demo', [], angular.noop);<br /> app.controller("TestCtrl",<br /> function($scope) {<br /> $scope.name = "qihao";<br /> });<br /> app.directive("t",<br /> function() {<br /> return {<br /> controller : function($scope){$scope.name = "qq"},<br /> template : "<div>test:implementToParent{{name}}</script>

",
                    replace : true,
                    scope : true     //作用域是继承的,默认就是继承的
                }
            });
            app.directive("t2",
            function() {
                return {
                    controller : function($scope){$scope.name = "nono"},
                    template : "

test:implementToParent{{name}}

",
                    replace : true,
                    restrict : "AE"
                }
            });
            app.directive("t3",
            function() {
                return {
                    template : "

test:implementToParent_titleIs:{{title}}
title2Is:{{title2}}

",
                    replace : true,
                    restrict : "AE",
                    scope : {
                        title : "@t3",
                        title2 : "@title2"
                    }
                }
            });
            app.directive('a',
            function() {
                var func = function() {
                    console.log('compile');
                    return function() {
                        console.log('link');
                    }
                }
                var controller = function($scope, $element, $attrs, $transclude) {
                    //$transclude ：是指令标签的复制体
                    console.log('controller');
                    console.log($scope);
                    console.log($transclude);
                    //$transclude接受两个参数，你可以对这个克隆的元素进行操作，
                    var node = $transclude(function(clone_element, scope) {
                        $element.append(clone_element);
                        $element.append("spanTag___");
                        console.log(clone_element);
                        console.log('--');
                        console.log(scope);
                    });
                    console.log(node);
                }
                return {
                    compile: func,
                    template: "

",
                    controller: controller,
                    transclude: true,
                    restrict: 'AE'
                }
            });
            app.directive('compile',function() {
                var func = function() {
                    console.log('a compile');
                    return {
                        pre: function() {
                            console.log('a link pre')
                        },
                        post: function() {
                            console.log('a link post')
                        },
                    }
                }
                return {
                    restrict : "AE",
                    compile : func
                }
            })
              app.directive('test', function(){
                var func = function($element, $attrs){
                  console.log($attrs);
                  $attrs.$observe('a', function(new_v){
                    console.log(new_v);
                  });
                }
                return {compile: func,
                        restrict: 'E'}
              });
              app.controller('TestCtrl', function($scope){
                $scope.a = 123;
              });
              app.directive('te', function(){
                var func = function($scope,$element, $attrs,$ctrl){
                    console.log($ctrl)
                    //$attrs.$set. 给这个属性设置b，值为ooo，就是这样
                         $attrs.$set('b', 'ooo');
$attrs.$set('a-b', '11');
//This is a bit unclear //The second parameter value
$attrs.$set('c-d', '11', true, 'c_d');
console.log($attrs);
                }
                   return {
                            compile: function(){
Return func
                                                                     },
                          restrict: 'E'
                 }
              });
                 app.controller('TestCtrl', function($scope){
$scope.show = function(v){console.log(v);}
              });
                                                                                         


That’s it for this article. I hope you can have a new understanding of the use of $attrs in angularJS. I hope you like this article.