运行expo start命令后出现无效的正则表达式错误 [英] Invalid Regular Expression error after running expo start command

问题描述

我是React本机开发的新手.运行后:

I am new to React native development. After running:

expo start

或

npm start

或

yarn start

它返回以下错误消息:

Invalid regular expression error

我该如何调试呢?

PS C:\Users\Admin\Desktop\React Course\New folder (2)\newproject> expo start
Starting project at C:\Users\Admin\Desktop\React Course\New folder (2)\newproject
Expo DevTools is running at http://localhost:19002
Opening DevTools in the browser... (press shift-d to disable)
error Invalid regular expression: /(.*\\__fixtures__\\.*|node_modules[\\\]react[\\\]dist[\\\].*|website\\node_modules\\.*|heapCapture\\bundle\.js|.*\\__tests__\\.*)$/: Unterminated character class. Run CLI with --verbose flag for more details.

SyntaxError: Invalid regular expression: /(.*\\__fixtures__\\.*|node_modules[\\\]react[\\\]dist[\\\].*|website\\node_modules\\.*|heapCapture\\bundle\.js|.*\\__tests__\\.*)$/: Unterminated character class
    at new RegExp ()
    at blacklist (C:\Users\Admin\Desktop\React Course\New folder (2)\newproject\node_modules\metro-config\src\defaults\blacklist.js:34:10)
    at getBlacklistRE (C:\Users\Admin\Desktop\React Course\New folder (2)\newproject\node_modules\@react-native-community\cli\build\tools\loadMetroConfig.js:66:59)
    at getDefaultConfig (C:\Users\Admin\Desktop\React Course\New folder (2)\newproject\node_modules\@react-native-community\cli\build\tools\loadMetroConfig.js:82:20)
    at load (C:\Users\Admin\Desktop\React Course\New folder (2)\newproject\node_modules\@react-native-community\cli\build\tools\loadMetroConfig.js:118:25)
    at Object.runServer [as func] (C:\Users\Admin\Desktop\React Course\New folder (2)\newproject\node_modules\@react-native-community\cli\build\commands\server\runServer.js:82:58)
    at Command.handleAction (C:\Users\Admin\Desktop\React Course\New folder (2)\newproject\node_modules\@react-native-community\cli\build\index.js:164:23)
    at Command.listener (C:\Users\Admin\Desktop\React Course\New folder (2)\newproject\node_modules\commander\index.js:315:8)
    at Command.emit (events.js:210:5)
    at Command.parseArgs (C:\Users\Admin\Desktop\React Course\New folder (2)\newproject\node_modules\commander\index.js:651:12)
Metro Bundler process exited with code 1
Set EXPO_DEBUG=true in your env to view the stack trace.

推荐答案

要解决此问题，请转到

\node_modules\metro-config\src\defaults\blacklist.js

更改

var sharedBlacklist = [
  /node_modules[/\\]react[/\\]dist[/\\].*/,
  /website\/node_modules\/.*/,
  /heapCapture\/bundle\.js/,
  /.*\/__tests__\/.*/
];

到

var sharedBlacklist = [
  /node_modules[\/\\]react[\/\\]dist[\/\\].*/,
  /website\/node_modules\/.*/,
  /heapCapture\/bundle\.js/,
  /.*\/__tests__\/.*/
];

选中此以获取更多信息.

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