Chrome端MobX开发者工具突然失效，报Cannot read property 'spy'错误求助

Hey there, sorry to hear you're stuck with this frustrating error in Chrome's MobX DevTools. This issue typically pops up due to version mismatches, corrupted cached data, or incorrect MobX initialization in your app. Let's walk through actionable fixes to get things back on track:

• Update the MobX DevTools Extension
  Outdated extensions often break compatibility with newer (or even older) MobX versions. Head to chrome://extensions/, toggle on "Developer mode" in the top-right corner, then click the "Update" button at the top-left to refresh all extensions. Restart Chrome after this and check if the error vanishes.

• Verify MobX Version Compatibility
  Make sure your app's MobX version plays nice with the extension:

  • If you’re using MobX 6+, ensure your extension is fully updated—older extension versions don’t support the new makeAutoObservable API.
  • If you’re on an older MobX version (like 4/5), the latest extension might have dropped support. You can roll back to a compatible extension version via the Chrome Web Store’s version history if needed.

• Clear Extension Cache & Data
  Corrupted cached data can cause odd conflicts. Here’s how to wipe it:

  1. Go to Chrome Settings → Privacy and Security → Site Settings.
  2. Scroll down to "View permissions and data stored across sites".
  3. Search for "MobX" in the top search bar.
  4. Click the MobX DevTools entry, then select "Clear data".
  5. Restart Chrome and test the dev tools again.

• Re-initialize MobX Properly in Your App
  Sometimes the dev tool can’t detect your MobX instance if it’s set up incorrectly. For MobX 6+, double-check your store initialization:

  import { makeAutoObservable } from 'mobx';
  
  class MyStore {
    constructor() {
      makeAutoObservable(this); // Critical for the dev tool to recognize the store
    }
  }
  

  If using React, ensure your app is wrapped with the MobX Provider so the dev tool can access your stores.

• Toggle the Extension Off/On
  Simple but often effective: Navigate to chrome://extensions/, find MobX DevTools, toggle it off, wait 10 seconds, then toggle it back on. This resets the extension’s connection to your app.

• Rule Out Conflicting Extensions
  Other dev tools (like React DevTools or Redux DevTools) might interfere temporarily. Try disabling all extensions except MobX DevTools—if the error goes away, re-enable them one by one to spot the culprit.

Hope one of these fixes resolves your issue!

内容的提问来源于stack exchange，提问作者sumit