Angular 引用库

<!doctype html>
<html ng-app>
    <head>
        <script src="http://code.angularjs.org/angular-1.0.1.min.js"></script>
    </head>
    <body>
        Your name: <input type="text" ng-model="yourname" placeholder="World">
        <hr>
        Hello {{yourname || 'World'}}!
    </body>
</html>

如果想给app命名，应该创建一个实例对象：

<!DOCTYPE html>
<html lang="en" ng-app="myApp">
<head>
    <meta charset="UTF-8">
</head>
<body>
    <div>
        yourname:<input type="text" ng-model="yourname" placeholder="world">
        <br>
        hello {{ yourname || 'world' }}!
    </div>

</body>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.0-rc.2/angular.min.js"></script>
<script>
    var app = angular.module('myApp',[]);
</script>
</html>