vue中使用vant的Toast轻提示报错的解决

Toast.success('成功文案');
Toast.fail('失败文案');

this.$toast.success("成功文案");
this.$toast.fail("失败文案");

<link rel="stylesheet" type="text/css" href="aui-20170109-v2.1/css/aui.css" rel="external nofollow"  />
<link rel="stylesheet" type="text/css" href="aui-20170109-v2.1/css/aui-toast.css" rel="external nofollow"  />
 

<div class="aui-btn aui-btn-info aui-btn-block" onclick="return errorTest()">注册</div>

function errorTest() {
   var toast = new auiToast();
   toast.success({
      title:"提交成功",
      duration:2000
   });//成功类
 
   toast.fail({
      title:"提交失败",
      duration:2000
   });//失败类
 
   toast.custom({
      title:"成功给了一个赞",
      html:'<i class="aui-iconfont aui-icon-laud"></i>',
      duration:2000
   });自定义图标
 
   toast.loading({ 
      title:"加载中",
      duration:2000
   },function(ret){ 
        console.log(ret);
        setTimeout(function(){
           toast.hide();
        }, 3000)
   });加载中：
}