defaultOpen="preview" 无效 #256
Description
您好，我在使用mavonEditor的时候想要设置为仅展现的效果，设置了如下三个属性
:subfield=“false" :toolbarsFlag="false" :defaultOpen=“preview"
但是页面展示还是markdown文件
报错如下：
[Vue warn]: Property or method "preview" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property. See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.
found in
麻烦您解答下这是什么问题造成的，谢谢！