实现无限级联动菜单的步骤
第一步:引入AngularJS
在HTML文件中引入AngularJS库,可以使用CDN或者下载本地文件。例如:
<script src="https://cdn.bootcdn.net/ajax/libs/angular.js/1.8.2/angular.min.js"></script>
第二步:创建AngularJS应用程序
创建AngularJS应用程序,指定应用程序名称和需要依赖的模块。
var app = angular.module('myApp', []);
第三步:定义控制器
定义控制器来控制页面的数据和行为,用于绑定到指定的HTML元素中。例如:
app.controller('myCtrl', function($scope, $http) {
$http.get("menu.json")
.then(function (response) {
$scope.menuData = response.data;
});
});
第四步:创建HTML结构
使用AngularJS的指令在HTML文件中创建元素,将数据和行为绑定到对应的元素上。例如:
<div ng-app="myApp" ng-controller="myCtrl">
<select ng-model="menu1" ng-options="item.name for item in menuData">
<option value="">请选择</option>
</select>
<select ng-model="menu2" ng-options="item.name for item in menu1.children">
<option value="">请选择</option>
</select>
<select ng-model="menu3" ng-options="item.name for item in menu2.children">
<option value="">请选择</option>
</select>
</div>
第五步:编写JSON数据
编写JSON数据,定义菜单的层级关系和内容。例如:
[
{
"name": "菜单1",
"children": [
{
"name": "菜单1-1",
"children": [
{
"name": "菜单1-1-1"
},
{
"name": "菜单1-1-2"
}
]
},
{
"name": "菜单1-2",
"children": [
{
"name": "菜单1-2-1"
},
{
"name": "菜单1-2-2"
}
]
}
]
},
{
"name": "菜单2",
"children": [
{
"name": "菜单2-1",
"children": [
{
"name": "菜单2-1-1"
},
{
"name": "菜单2-1-2"
}
]
},
{
"name": "菜单2-2",
"children": [
{
"name": "菜单2-2-1"
},
{
"name": "菜单2-2-2"
}
]
}
]
}
]
示例说明一
以下是一个简单的HTML结构代码示例,展示了如何使用AngularJS实现两级联动菜单:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>AngularJS Demo</title>
<script src="https://cdn.bootcdn.net/ajax/libs/angular.js/1.8.2/angular.min.js"></script>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
$scope.menu1Data = [
{name:'菜单1',children:[
{name:'菜单1-1',children:[
{name:'菜单1-1-1'},
{name:'菜单1-1-2'}
]},
{name:'菜单1-2',children:[
{name:'菜单1-2-1'},
{name:'菜单1-2-2'}
]}
]},
{name:'菜单2',children:[
{name:'菜单2-1',children:[
{name:'菜单2-1-1'},
{name:'菜单2-1-2'}
]},
{name:'菜单2-2',children:[
{name:'菜单2-2-1'},
{name:'菜单2-2-2'}
]}
]}
];
});
</script>
</head>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
<select ng-model="menu1" ng-options="item.name for item in menu1Data">
<option value="">请选择</option>
</select>
<select ng-model="menu2" ng-options="item.name for item in menu1.children">
<option value="">请选择</option>
</select>
</div>
</body>
</html>
示例说明二
以下是一个使用JSON数据来实现无限级联动菜单的完整代码示例:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>AngularJS Demo</title>
<script src="https://cdn.bootcdn.net/ajax/libs/angular.js/1.8.2/angular.min.js"></script>
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope, $http) {
$http.get("menu.json")
.then(function (response) {
$scope.menuData = response.data;
});
});
</script>
</head>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
<select ng-model="menu1" ng-options="item.name for item in menuData">
<option value="">请选择</option>
</select>
<select ng-model="menu2" ng-options="item.name for item in menu1.children">
<option value="">请选择</option>
</select>
<select ng-model="menu3" ng-options="item.name for item in menu2.children">
<option value="">请选择</option>
</select>
</div>
</body>
</html>
需要注意的是,在上面的示例中,menu.json需要放在与HTML文件同一目录下的位置。同时,menu.json也可以是通过网络请求获取到的数据。
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