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Refactoring legacy JavaScript to ES2023+ involves converting callback patterns to async/await, applying optional chaining and nullish coalescing, and migrating to ESM import/export syntax. This modernizes .js files for better performance and maintainability in Node.js or browser environments.

The best way to handle errors in async/await flows is wrapping Promise-based operations in try/catch blocks. This ensures robust error handling for Node.js APIs and browser Fetch API integrations, preventing unhandled rejections and improving application stability.

Yes, you can use top-level await and dynamic imports in vanilla JavaScript projects using ES module (ESM) systems. This enables modular architectures and asynchronous module loading compatible with modern Node.js and browser environments.

Yes, this JavaScript refactoring approach works with Web Workers and the Fetch API. It optimizes browser-based code by applying ES2023+ syntax and async patterns to these APIs, ensuring correct implementation and performance optimization.

Migrating CommonJS to ESM involves replacing require statements with static or dynamic import/export syntax. This transition supports ES2023+ features, top-level await, and modern Node.js compatibility while maintaining modular architecture.

Adding JSDoc-style documentation during JavaScript refactoring provides type safety and better code readability. It complements ES2023+ syntax and async/await patterns by ensuring proper documentation for functions, modules, and API integrations.