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angularJS 中$attrs方法使用指南

网络编程 2021-07-04 21:47www.168986.cn编程入门
这篇文章主要介绍了angularJS 中$attrs方法使用指南,需要的朋友可以参考下

这里给大家分享的是一个angularJS 中$attrs方法的使用示例

代码如下:

<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <title>
            无标题文档
        </title>
        <script src="">
        </script>
        <script src="">
        </script>
    </head>
    <body ng-app="Demo">
        <div a>
            a_directive
        </div>
        <div ng-controller="TestCtrl">
            <h1 t>
                原始内容
            </h1>
            <h2 t2>
                原始内容
            </h2>
            <h3 t3="hiphop" title2="{{name}}">
                原始内容
            </h3>
            <div pile></div>
            <div>
                <test a="{{ a }}" b c="xxx"></test>
                <button ng-click="a=a+1">
                    修改
                </button>
            </div>
            <te a="1" ys-a="123" ng-click="show(1)">这里</te>
        </div>
        <script>
            var app = angular.module('Demo', [], angular.noop);
            app.controller("TestCtrl",
            function($scope) {
                $scope.name = "qihao";
            });
            app.directive("t",
            function() {
                return {
                    controller : function($scope){$scope.name = "qq"},
                    template : "<div>test:implementToParent{{name}}</div>",
                    replace : true,
                    scope : true     //作用域是继承的,默认就是继承的
                }
            });
            app.directive("t2",
            function() {
                return {
                    controller : function($scope){$scope.name = "nono"},
                    template : "<div>test:implementToParent{{name}}</div>",
                    replace : true,
                    restrict : "AE"
                }
            });
            app.directive("t3",
            function() {
                return {
                    template : "<div>test:implementToParent_titleIs:{{title}}<br>title2Is:{{title2}}</div>",
                    replace : true,
                    restrict : "AE",
                    scope : {
                        title : "@t3",
                        title2 : "@title2"
                    }
                }
            });
            app.directive('a',
            function() {
                var func = function() {
                    console.log('pile');
                    return function() {
                        console.log('link');
                    }
                }
                var controller = function($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);
                        $element.append("<span>spanTag___</span>");
                        console.log(clone_element);
                        console.log('--');
                        console.log(scope);
                    });
                    console.log(node);
                }
                return {
                    pile: func,
                    template: "<h1 ng-transclude></h1>",
                    controller: controller,
                    transclude: true,
                    restrict: 'AE'
                }
            });
            app.directive('pile',function() {
                var func = function() {
                    console.log('a pile');
                    return {
                        pre: function() {
                            console.log('a link pre')
                        },
                        post: function() {
                            console.log('a link post')
                        },
                    }
                }
                return {
                    restrict : "AE",
                    pile : func
                }
            })
              app.directive('test', function(){
                var func = function($element, $attrs){
                  console.log($attrs);
                  $attrs.$observe('a', function(new_v){
                    console.log(new_v);
                  });
                }
                return {pile: 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');
                  //这个还有点不懂啊 //第二个参数值
                  $attrs.$set('c-d', '11', true, 'c_d');
                  console.log($attrs);
                }
                return {
                        pile: function(){
                            return func
                        },
                        restrict: 'E'
                    }
              });
              app.controller('TestCtrl', function($scope){
                $scope.show = function(v){console.log(v);}
              });
        </script>
    </body>
</html>

本文内容就到这里了，希望大家能对angularJS 中$attrs的使用有了新的认识，希望大家能够喜欢本文。

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