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Fast Defer
Fast Defer is a fast and minimal deferred implementation for javascript.
Table of Contents
Installing
Node
npm install fast-defer # or yarn add fast-defer
const { deferred } = require('fast-defer');
import { deferred } from 'fast-defer';
Browser
<script
crossorigin
src="https://cdn.jsdelivr.net/npm/fast-defer@latest/dist/index.umd.js"
></script>
const { deferred } = window.fastDefer;
Url Import
import { deferred } from 'https://cdn.skypack.dev/fast-defer@latest';
Getting Started
A deferred is nothing more than a promise with .resolve() and a .reject() method. You
can use it to create a promise that will be resolved or rejected at some point in the
future and, probably, in another scope.
import { deferred, isDeferred } from 'fast-defer';
const waitingSomething = deferred();
waitingSomething.then((val) => {
console.log('Resolved');
});
waitingSomething.catch((error) => {
console.log('Rejected');
});
// Other file, function or etc
someCallback((response, error) => {
if (error) {
waitingSomething.reject(error);
} else {
waitingSomething.resolve(response);
}
});
Browser Compatibility
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Node.js | Deno | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on iOS | Samsung Internet | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Promise() constructor | 32 | 12 | 29* | X | 19 | 8 | 0.12 | 1.0 | 4.4.3 | 32 | 29* | 19 | 8* | 2.0 |
| Symbol() constructor | 38 | 12 | 36 | X | 25 | 9 | 0.12 | 1.0 | 38 | 38 | 36 | 25 | 9 | 3.0 |
License
Licensed under the MIT. See LICENSE for more informations.
