Webpack/Babel报错：Uncaught (in promise) No plugins, nothing to do! 求助排查

Hey Anton, let's walk through this issue step by step. That error typically fires when a promise-based plugin system expects registered plugins to exist, but ends up with an empty set—and the await in your function is likely exposing a timing or scope issue that wasn't visible before, even though you've used await elsewhere. Here are actionable things to check:

• Confirm plugin registration happens before the plugin system runs
  The await might be delaying your plugin registration code until after the library's plugin system has already checked for plugins. For example, if your code looks like this:

  async function initMyLibrary() {
    await fetchSomeConfig(); // This delays plugin registration
    registerMyPlugins(); // Too late—plugin system already ran its check
  }
  

  Try reordering the logic: register plugins first, then run your async setup, or modify the plugin system to wait until plugins are registered before executing.

• Check if await is hiding plugin registration errors
  If your plugin registration code is wrapped in a try/catch that's silenced by the await, you might be missing errors that prevent plugins from being added. Add explicit logging to confirm plugins are actually being registered:

  try {
    await registerPluginsAsync();
    // Verify the registry has plugins
    console.log('Registered plugin count:', getPluginRegistry().length);
  } catch (err) {
    console.error('Plugin registration failed:', err); // Don't suppress this!
  }
  

• Look for race conditions with plugin system initialization
  If your library's plugin system auto-starts when the module loads (instead of waiting for your setup code), the await could create a race where the system checks for plugins before they're ready. Add a way to signal the plugin system to wait for your async setup to finish:

  // Create a promise that resolves once plugins are registered
  const pluginsReady = new Promise(async (resolve) => {
    await myAsyncSetupTask();
    registerRequiredPlugins();
    resolve();
  });
  
  // Modify the plugin system to wait for this promise
  async function startPluginSystem() {
    await pluginsReady;
    if (getPluginRegistry().length === 0) {
      throw new Error('No plugins, nothing to do!');
    }
    // Proceed with plugin logic
  }
  

• Ensure await isn't altering the plugin registration scope
  Sometimes await can change context (like this binding) or scope, causing plugins to be registered to a local instance instead of the library's shared registry. Double-check that you're referencing the correct registry object:

  // ❌ Wrong: registering to a local registry instead of the library's global one
  async function badSetup() {
    await somethingAsync();
    const localRegistry = new PluginRegistry();
    localRegistry.add(MyPlugin);
  }
  
  // ✅ Correct: use the library's shared registry
  async function goodSetup() {
    await somethingAsync();
    LibraryGlobalRegistry.add(MyPlugin);
  }
  

内容的提问来源于stack exchange，提问作者Anton