angular的ng-init指令
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script src="https://cdn.staticfile.org/angular.js/1.4.6/angular.min.js"></script>
</head>
<body>
<!-- <div ng-app="" ng-init="quantity=1;cost=5">
<p>总价：{{quantity*cost}}</p>
</div> -->
<div ng-app="" ng-init="quantity=1;cost=5">
<p>总价：<span ng-bind="quantity*cost"></span></p>
</div>
</body>
</html>