Software⏱️ 2 min read📅 2026-05-31

How to Fix: how to solve Execution failed for task ':app:compileFlutterBuildDebug'

Flutter app compilation error due to missing dart:html import.

Quick Answer: Try removing the 'dart:html' import from your main.dart file and use alternative libraries for HTML-related functionality, such as http or html package.

The error message indicates that the Flutter project is unable to find the 'dart:html' package, which is required for certain HTML-related functionality. This issue can be resolved by adding the following line of code in your pubspec.yaml file:

⚠️ Common Causes

  • The 'dart:html' package was not added to the project's dependencies.

🛠️ Step-by-Step Verified Fixes

Method 1: Add 'html' package to pubspec.yaml

  1. Step 1: Open your project's pubspec.yaml file and add the following line under the 'dependencies' section:

Method 2: Update Flutter and Android Studio

  1. Step 1: Open your terminal or command prompt and run the following command to update Flutter:

💡 Conclusion

By following these steps, you should be able to resolve the 'Execution failed for task ':app:compileFlutterBuildDebug' error and successfully build your Flutter app.

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