WeePromise

An ultra light (<1k minified / gzipped) Promises / A+ implementation.

Installation

npm i wee-promise --save

Usage

WeePromise supports both deferred and resolver patterns:

function asDeferred() {
	const deferred = new WeePromise();
	doSomethingAsync(deferred.resolve);
	return deferred;
}

function asResolver() {
	return new WeePromise((resolve) => {
		doSomethingAsync(resolve);
	});
}

as well as ES6-style all and race methods:

const arr = getCollectionOfPromises();

WeePromise.all(arr).then((result) => {
	// result is an array of all of the promise values in arr.
});

WeePromise.race(arr).then((result) => {
	// result is the value of the first resolved promise in arr.
});

and can be extended to create objects that behave as A+ compliant promises:

class Gnarly extends WeePromise {
	// ...
}

If you want to change WeePromise's async provider, just override WeePromise.async:

WeePromise.async = (cb) => {
	const img = new Image();
	img.onload = img.onerror = cb;
	img.src = 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7';
};

Build & Test

npm i && npm run build