storybook的属性类型说明出现了unknow

来源：7-9 拿来主义 - 自定义 Transition 组件编码第二部分

菜鸟x

2020-06-05

图片描述
代码我是自己跟着打了一遍不行，然后又复制老师您的代码试过，还是这样。
下面是storybook的版本号

 "storybook": "start-storybook -p 9009 -s public",
    "build-storybook": "build-storybook -s public"
  },
  "devDependencies": {
    "@storybook/addon-actions": "^5.3.19",
    "@storybook/addon-info": "^5.2.8",
    "@storybook/addon-links": "^5.3.19",
    "@storybook/addons": "^5.3.19",
    "@storybook/preset-create-react-app": "^3.0.0",
    "@storybook/react": "^5.2.8",

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