Harry Yates
I'm a web developer focused on TypeScript, React, and Three.js.
TypeScript's ReturnType
emerges as a tool and veritable utility shape-shifter, adapting to an evolving codebase.
ReturnType
extracts the essence—the type—of what a function returns.
This utility type peers into the function, discerns its output, and returns a type that perfectly matches the output.
Consider the ReturnType
as a faithful steward of your code’s consistency. It guards against the chaos resulting from frequent business logic or data structure modifications.
ReturnType
preserves the integrity of your data types across the annals of code changes.
Let's sketch a scenario.
A function is born. Here fetchDetails
promises a glimpse into a character,
We employ ReturnType
to capture the essence of fetchDetails
.
Character
type, thus defined, automatically adapts to whatever fetchDetails
chooses to reveal.
Now, should fetchDetails
evolve to include, say, demeanor
, Character
would gracefully embrace this new trait without a flicker of disruption across the scripts that rely on it.