无法读取未定义的属性“字符串" |React.PropTypes |LayoutPropTypes.js [英] Cannot read property 'string' of undefined | React.PropTypes | LayoutPropTypes.js

问题描述

删除并重新安装我的 node_modules 文件夹后，我在 LayoutPropTypes.js 文件中遇到了一个我不明白的问题.

After deleting and reinstalling my node_modules folder, I'm facing an issue that I don't understand in LayoutPropTypes.js file.

在node_modules/react-native/Libraries/StyleSheet/LayoutPropTypes.js以下变量未定义:var ReactPropTypes = require('React').PropTypes;

反应原生:0.45.1反应:16.0.0-alpha.12

react-native: 0.45.1 react: 16.0.0-alpha.12

推荐答案

React.PropTypes 现在已弃用:

注意:React.PropTypes 从 React v15.5 开始被弃用.请使用取而代之的是 prop-types 库.

Note: React.PropTypes is deprecated as of React v15.5. Please use the prop-types library instead.

您现在需要单独添加 prop-types 包.该错误很可能刚刚开始出现，因为您删除了 node_modules 文件夹，然后重新安装了升级 react 版本的所有内容.

You need to add the prop-types package separately now. The error most likely just started to show up because you deleted your node_modules folder and then reinstalled everything which upgraded your react version.

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