故障派驻

一般的解决问题

• --display-error-details 给你更多详情.
• 阅读配置 regarding resolving starting at resolve
  • 加载器有它们自己的解决配置项 resolveLoader

npm link 没有找到依赖模块

The node.js module resolving algorithm is pretty simple: module dependencies are looked up in node_modules folders in every parent directory of the requiring module. When you npm link modules with peer dependencies that are not in your root directory, modules can no longer be found. (You probably want to consider peerDependencies with npm link as broken by design in node.js.) Note that a dependency to the application (even if this is not the perfect design) is also a kind of peerDependency even if it's not listed as such in the module's package.json.

But you can easily workaround that in webpack: Add the node_modules folder of your application to the resolve paths. There are two config options for this: resolve.fallback and resolveLoader.fallback.

这是一个配置示例:

module.exports = {
  resolve: { fallback: path.join(__dirname, "node_modules") },
  resolveLoader: { fallback: path.join(__dirname, "node_modules") }
};

监控

webpack监控时候修改时没有重新编译

没有足够的监控器

Verify that if you have enough available watchers in your system. If this value is too low, the file watcher in Webpack won't recognize the changes:

cat /proc/sys/fs/inotify/max_user_watches

Arch users, add fs.inotify.max_user_watches=524288 to /etc/sysctl.d/99-sysctl.conf and then execute sysctl --system. Ubuntu users (and possibly others): echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p.

OS-X fsevents 缺陷

On OS-X folders can get corrupted. See this article:

OS X FSEvents bug may prevent monitoring of certain folders

Windows 路径

webpack expects absolute paths for many config options. __dirname + "/app/folder" is wrong, because windows uses \ as path separator. This breaks some stuff.

Use the correct separators. I.e. path.resolve(__dirname, "app/folder") or path.join(__dirname, "app", "folder").