1-3系统指令-差值表达式.html

<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title></title>
  </head>
  <body>
  <div id="box">
    {{msg}}<br>
    {{msg +1 }}<br>
    {{msg=='helloword'? 'true':'false'}}<br><!-- if判断不可以使用 -->
  </div>


  <script type="text/javascript" src="js/vue.js">

  </script>
  <script type="text/javascript">
  var vue=new Vue({
    el:'#box',
    data:{msg:'helloword'}

  });
  </script>
  

  </body>
</html>