1.0.0 • Published 10 months ago
@esfx/async-lazy v1.0.0
@esfx/async-lazy
Lazy-initialized asynchronous value.
Overview
Installation
npm i @esfx/async-lazy
Usage
import { AsyncLazy } from "@esfx/async-lazy";
async function main() {
// lazy initialize an object
const lazy1 = new AsyncLazy(() => new SomeObject());
lazy1.isStarted; // false
const p1 = lazy1.value; // Promise {}
lazy1.isStarted; // true
await p1; // SomeObject {}
// lazy initialize with arguments
const lazy2 = Lazy.from(
async (a, b) => (await a) + (await b),
Promise.resolve(1),
Promise.resolve(2));
lazy2.isStarted; // false
const p2 = lazy2.value; // Promise {}
lazy2.isStarted; // true
await p2; // 3
// initialized "lazy"
const lazy3 = Lazy.for(Promise.resolve("test"));
lazy3.isStarted; // true
await lazy3.value; // "test"
}
main().catch(e => console.error(e));
API
You can read more about the API here.
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