为啥报错啊，代码写得和老师写的一样 啊
[Vue warn]: Error in callback for watcher "items": "ReferenceError: stringify is not defined"
found in
---> <Hello> at C:\Users\dell\my-project\src\components\Hello.vue
<App> at C:\Users\dell\my-project\src\App.vue
<Root>
从猿进化到猿
2017-07-03
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