AngularJS

时间 2019-11-08

原文原文链接

一、ng-app=" " 定义angularJS的使用范围；php

二、ng-init="变量=值;变量='值'" 初始化变量的值，有多个变量时，中间用分号隔开；css

三、ng-model="变量" 定义变量名；html

四、ng-bind="变量" 绑定变量名，获取该变量的数据。这里的变量就是第3条的变量名。可是通常都用双重花括号来获取变量的值，好比：{{变量}}。angularjs

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.staticfile.org/angular.js/1.4.6/angular.min.js"></script>
</head>
<body>

<div ng-app="">
  <p>名字 : <input type="text" ng-model="name"></p>
  <h1>Hello {{name}}</h1>
</div>

</body>
</html>

ng-init 指令初始化 AngularJS 应用程序变量。服务器

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.staticfile.org/angular.js/1.4.6/angular.min.js"></script> 
</head>
<body>

<div ng-app="" ng-init="firstName='John'">

<p>姓名为 <span ng-bind="firstName"></span></p>

</div>

</body>
</html>

AngularJS 应用

AngularJS 模块（Module） 定义了 AngularJS 应用。app

AngularJS 控制器（Controller） 用于控制 AngularJS 应用。spa

ng-app指令指明了应用, ng-controller 指明了控制器。code

<div ng-app="myApp" ng-controller="myCtrl">
 
名: <input type="text" ng-model="firstName"><br>
姓: <input type="text" ng-model="lastName"><br>
<br>
姓名: {{firstName + " " + lastName}}
 
</div>
 
<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
    $scope.firstName= "John";
    $scope.lastName= "Doe";
});
</script>

ng-repeat 指令会重复一个 HTML 元素cdn

<div ng-app="" ng-init="names=[
{name:'Jani',country:'Norway'},
{name:'Hege',country:'Sweden'},
{name:'Kai',country:'Denmark'}]">
 
<p>循环对象：</p>
<ul>
  <li ng-repeat="x    in names">
    {{ x.name + ', ' + x.country }}
  </li>
</ul>
 
</div>

Scope(做用域) 是应用在 HTML (视图) 和 JavaScript (控制器)之间的纽带。htm

Scope 是一个对象，有可用的方法和属性。

Scope 可应用在视图和控制器上。

<div ng-app="myApp" ng-controller="myCtrl">

<h1>{{lastname}} 家族成员:</h1>

<ul>
    <li ng-repeat="x in names">{{x}} {{lastname}}</li>
</ul>

</div>

<script>
var app = angular.module('myApp', []);

app.controller('myCtrl', function($scope, $rootScope) {
    $scope.names = ["Emil", "Tobias", "Linus"];
    $rootScope.lastname = "Refsnes";
});
</script>

$http 是 AngularJS 应用中最经常使用的服务。服务向服务器发送请求，应用响应服务器传送过来的数据。

<div ng-app="myApp" ng-controller="siteCtrl"> 
 
<ul>
  <li ng-repeat="x in names">
    {{ x.Name + ', ' + x.Country }}
  </li>
</ul>
 
</div>
 
<script>
var app = angular.module('myApp', []);
app.controller('siteCtrl', function($scope, $http) {
  $http.get("http://www.runoob.com/try/angularjs/data/sites.php")
  .then(function (response) {$scope.names = response.data.sites;});
});
</script>

使用 angular 显示表格是很是简单的：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.bootcss.com/angular.js/1.6.3/angular.min.js"></script>
</head>
<body>
 
<div ng-app="myApp" ng-controller="customersCtrl"> 
 
<table>
  <tr ng-repeat="x in names">
    <td>{{ x.Name }}</td>
    <td>{{ x.Country }}</td>
  </tr>
</table>
 
</div>
 
<script>
var app = angular.module('myApp', []);
app.controller('customersCtrl', function($scope, $http) {
    $http.get("/try/angularjs/data/Customers_JSON.php")
    .then(function (result) {
        $scope.names = result.data.records;
    });
});
</script>

ng-show 指令可用于设置应用中的一部分是否可见。

ng-show="false" 能够设置 HTML 元素 不可见。

ng-show="true" 能够以设置 HTML 元素可见。

如下实例使用了 ng-show 指令:

<div ng-app="myApp" ng-controller="personCtrl">

<button ng-click="toggle()">隐藏/显示</button>

<p ng-show="myVar">
名: <input type="text" ng-model="firstName"><br>
姓: <input type="text" ng-model="lastName"><br>
<br>
姓名: {{firstName + " " + lastName}}
</p>

</div>

<script>
var app = angular.module('myApp', []);
app.controller('personCtrl', function($scope) {
    $scope.firstName = "John",
    $scope.lastName = "Doe"
    $scope.myVar = true;
    $scope.toggle = function() {
        $scope.myVar = !$scope.myVar;
    }
});
</script>