Promise Helpers

Utility functions for working with promise operations.

Functions

Function	Description
consoleLogPromise	Returns a function that logs data to the console and passes it through.
createMutex	Creates a mutex: a lock allowing at most one holder at a time, queueing excess `acquire()` callers in FIFO order.
createSemaphore	Creates a semaphore limiting concurrent access to `permits` holders at a time, queueing excess `acquire()` callers in F…
defer	Runs an async function and guarantees that all deferred callbacks are executed afterwards, in LIFO order (last register…
delay	Creates a promise that resolves after specified delay
falsyPromiseOrThrow	Returns a function that passes through falsy data or throws an error.
guard	Wraps a function so that if it throws, a default value is returned instead of propagating the error.
meaningPromiseOrThrow	Returns a function that passes through meaningful data or throws an error.
parallel	Runs an array of async functions with a concurrency limit.
parallelSettle	Runs an array of async functions with a concurrency limit, partitioning the outcomes instead of rejecting on the first …
resolveRecord	Resolves an array of keys into a record by calling an async mapper for each key.
retry	Retries a promise-returning function up to maxAttempts times
safeFetch	Wraps `fetch` with built-in error handling: returns `null` when the request fails (network error, non-OK status, or par…
settle	Runs an array of promises concurrently and partitions the outcomes instead of rejecting on the first failure, unlike `P…
timeout	Wraps a promise to reject with a `TimeoutError` if it does not resolve within the specified duration.
truthyPromiseOrThrow	Returns a function that passes through truthy data or throws an error.
tryit	Wraps a function so it never throws.
withResolvers	native JS Promise.withResolvers() (ES2024)