1.5.8之前，指令绑定

大概可以参考这篇文章，已经很详细了：http://www.cnblogs.com/liulangmao/p/3990720.html

1.5.8 指令绑定

<!DOCTYPE html>
<html ng-app="testApp">
<head>
  <title>angular-指令-scope</title>
  <meta charset="utf-8">
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.6/angular.min.js"></script>
</head>
<body>
  
</body>
</html>