promise_fns

Promise utility functions for Deno.

Inspired by the sindresorhus promise-fun collection. Parity with the node promise-fun library is not guaranteed.

Features:

each function is independently importable
all typesafe, type reflecting APIs
concurrency control for most collection iterating functions
debuggable. simplified source, named functions (so your stack trace is legible!)

usage

You can import any individual function as follows:

import fn from "https://deno.land/x/promise_fns/src/FUNCTION_NAME.ts";
fn(...)

All functions are listed in the functions table.

A full example:

import delay from "https://deno.land/x/promise_fns/src/delay.ts";
const delayedTwo = await delay(100, 2);
console.log(1 + delayedTwo); // 3

function	description	links
all	resolve an eager or lazy collection of promises	src test
catchIf	Conditional promise catch handler	src test
delay	create a promise that sleeps for some milliseconds then resolves	src test
delayReject	create a promise that sleeps for some milliseconds then rejects	src test
if	Conditional promise chains	src test
log	Log the resolved value of a promise	src test
logCatch	Log the rejected value of a promise	src test
map	maps a collection into a new collection asynchronously	src test
promisify	converts a node-style callback function into a promisified function, returning the result after `err`, per `(err, result) => void`	src test
promisifyMulti	converts a node-style callback function into a promisified function, returning all results after `err`, per `(err, ...results) => void`	src test
props	maps a { key:promise } mapped collection to a { key:resolved-promise } mapped collection	src test
queue	creates a queue that allows users to add work. queue resolves when no work is outstanding	src test
tap	Tap into a resolving promise chain without affecting the resolved value	src test
tapCatch	Tap into a rejecting promise chain without affecting the rejected value	src test

More functions are on their way.

Wanting to add more great stuff?. See .github/contributing.md