Anthony Fu • 3/3/2025

Async, Sync, in Between

This article discusses the 'function coloring' problem in programming, where synchronous and asynchronous functions cannot be freely mixed. It explains how changing a function's type (sync/async) forces cascading changes throughout the call stack, increasing complexity. The piece uses JavaScript examples and discusses real-world library practices (like find-up) to illustrate the challenges and trade-offs of managing both execution models in a codebase.

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#JavaScript #async-await #Asynchronous