1. Installation and Setup Failures

Understanding the Issue

Developers face errors while installing Weex or setting up the environment, preventing project initialization.

Root Causes

• Incorrect Node.js or npm version.
• Missing dependencies for Weex CLI.
• Network restrictions blocking package downloads.

Fix

Ensure Node.js and npm are installed correctly:

node -v
npm -v

Update npm to the latest version:

npm install -g npm

Install Weex CLI globally:

npm install -g weex-toolkit

If installation fails, try clearing the npm cache:

npm cache clean --force

2. Rendering and UI Inconsistencies

Understanding the Issue

Weex components render differently across iOS, Android, and web environments.

Root Causes

• Platform-specific differences in rendering engines.
• Incorrect usage of layout styles.
• Third-party UI components behaving inconsistently.

Fix

Use flexbox for consistent layout behavior:

.container {
  display: flex;
  flex-direction: column;
}

Ensure components use platform-independent styles:

const platform = weex.config.env.platform;
const style = platform === 'iOS' ? { color: 'blue' } : { color: 'red' };

Test across multiple devices using Weex Playground:

weex run android
weex run ios

3. Debugging and Error Logging Issues

Understanding the Issue

Debugging Weex applications can be challenging due to a lack of clear error messages or missing logs.

Root Causes

• Improper use of Weex debugging tools.
• JavaScript runtime errors not visible in logs.
• Platform-specific issues not captured in Weex logs.

Fix

Enable Weex debugging mode:

weex debug

Use console logs for debugging:

console.log('Debug message', myVariable);

Check Weex logs on Android:

adb logcat | grep Weex

Check Weex logs on iOS:

idevicesyslog | grep Weex

4. Platform-Specific Behavior Differences

Understanding the Issue

Some features work on Android but not on iOS, or vice versa.

Root Causes

• Weex core APIs may behave differently on different platforms.
• Native module support varies between platforms.
• Permissions issues affecting platform-dependent features.

Fix

Use feature detection to handle platform differences:

if (weex.config.env.platform === 'iOS') {
  // iOS-specific code
} else {
  // Android-specific code
}

Check required permissions for native modules:

android.permission.INTERNET
ios: NSAppTransportSecurity

Update the Weex SDK to ensure compatibility:

npm update weex-sdk

5. Third-Party Module Integration Failures

Understanding the Issue

Weex apps fail to integrate third-party modules such as Firebase, Google Maps, or analytics tools.

Root Causes

• Unsupported native dependencies in Weex.
• Incorrect linking of third-party modules.
• Conflicts between native and Weex-based dependencies.

Fix

Manually link native modules for Android:

react-native link weex-plugin-firebase

For iOS, link dependencies using CocoaPods:

cd ios && pod install

Ensure Weex supports the required native APIs:

weex plugin list

Conclusion

Weex provides a powerful framework for mobile development, but troubleshooting installation issues, rendering inconsistencies, debugging difficulties, platform-specific behavior, and third-party integrations is essential for smooth application development. By optimizing debugging practices, ensuring correct configurations, and handling platform-specific nuances, developers can build stable and performant Weex applications.

FAQs

1. Why is my Weex installation failing?

Ensure Node.js and npm are updated, clear npm cache, and verify network connectivity.

2. How do I fix UI inconsistencies across platforms?

Use flexbox for layouts, avoid platform-specific styles, and test in the Weex Playground.

3. Why are my Weex debug logs not appearing?

Enable Weex debugging mode, use console logs, and check platform-specific log outputs.

4. How do I handle platform differences in Weex?

Use feature detection and ensure the correct permissions and dependencies are configured.

5. How do I integrate third-party modules with Weex?

Manually link dependencies for Android and iOS, and check Weex plugin compatibility.