reactjs - react-native 包本身抛出 babel 错误
问题描述
我正在尝试构建一个简单的 react-native 应用程序,并且我已经安装了所有依赖项。这是我的 webpack 配置文件
module: {
rules: [
{
test: /\.js?$/,
// exclude: /(node_modules)/,
use: {
loader: "babel-loader",
options: {
presets: [["@babel/preset-env"], ["@babel/preset-react"],[
require.resolve('babel-preset-react-app/dependencies'),
{ helpers: true },
]],
"plugins": [
[
"@babel/plugin-proposal-class-properties",
{
"loose": true
}
]
]
}
}
}
],
},
const commonResolveBlock = {
alias: {
/**
* When using react-native-web, this statement tells webpack to resolve react-native to react-native-web at all the
* places inside your application.
*/
//"react-native$": "react-native-web",
'react-native': path.join(__dirname, 'node_modules/react-native'),
},
};
当我尝试编译相同的 babel 在 node_modules 内的 react-native 包中抛出错误(安装 react-native 时下载的那个)
/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @format
* @flow
*/
'use strict';
import typeof AccessibilityInfo from './Libraries/Components/AccessibilityInfo/AccessibilityInfo';
错误显示在 type of 之后,并显示在所有行中。显示的错误是
ERROR in ./node_modules/react-native/index.js
Module build failed (from /Volumes/workplace/SudhirsmUIDev/node_modules/babel-loader/lib/index.js):
SyntaxError: /Volumes/workplace/SudhirsmUIDev/src/ECAPPExperimentalHEXReactAssets/node_modules/react-native/index.js: Unexpected token, expected "{" (13:7)
11 | 'use strict';
12 |
> 13 | import typeof AccessibilityInfo from './Libraries/Components/AccessibilityInfo/AccessibilityInfo';
| ^
14 | import typeof ActivityIndicator from './Libraries/Components/ActivityIndicator/ActivityIndicator';
15 | import typeof Button from './Libraries/Components/Button';
16 | import typeof CheckBox from './Libraries/Components/CheckBox/CheckBox';
at Object._raise (/Volumes/workplace/SudhirsmUIDev/node_modules/@babel/parser/src/parser/error.js:60:45)
代码中单独使用 react-native 的另一个问题,模块是从 /user/library/caches 导入的,而其他所有模块都是从 node_modules 中正确获取的。任何帮助将不胜感激。
解决方案
这是使用您未启用的 Flow 语法。添加'@babel/flow'
到 Babel 预设。