Summary:
This feature request aims to enhance Webpack's support for destructuring across various contexts, particularly in plugins like EnvironmentPlugin, DefinePlugin, and ImportMetaPlugin. The goal is to enable seamless tree shaking and efficient code bundling when using destructuring with dynamic imports, namespace objects, and JSON files.

Motivation: Currently, Webpack's support for destructuring in certain plugins is limited, leading to suboptimal tree shaking and larger bundle sizes. Modern JavaScript features like destructuring have become essential for writing clean, concise, and maintainable code. Extending destructuring support will:

Improve tree shaking efficiency.

Reduce bundle sizes by eliminating unused code paths.

Enhance compatibility with modern JavaScript practices.

Simplify developer workflows when using Webpack.

Scope: This feature would include:

1. Parser-Level Improvements:

Extend the core parser to handle destructuring more effectively in module scopes.

Ensure plugins like EnvironmentPlugin and DefinePlugin can recognize destructured variables without breaking tree shaking.

2. Plugin-Specific Enhancements:

Update plugins like ImportMetaPlugin to support partial destructuring without introducing unnecessary code paths.

Improve support for destructuring namespace imports and JSON files.

3. Testing and Validation:

Add comprehensive test cases for various destructuring patterns across supported plugins.

Ensure backward compatibility with existing projects.

Expected Outcome:

Reduced bundle sizes for projects using destructuring.

Improved performance due to more efficient tree shaking.

Better developer experience when using Webpack for modern JavaScript applications.