p-lazy

Create a lazy promise that defers execution until it's awaited or when `.then()`, `.catch()`, or `.finally()` is called

MIT 6 个版本
promise lazy defer deferred then catch fulfilled async function await promises bluebird
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安装
npm install p-lazy
yarn add p-lazy
pnpm add p-lazy
bun add p-lazy
README

p-lazy

Create a lazy promise that defers execution until it's awaited or when .then(), or .catch(), or .finally() is called

Useful if you're doing some heavy operations and would like to only do it when the promise is actually used.

Install

npm install p-lazy

Usage

import PLazy from 'p-lazy';

const lazyPromise = new PLazy(resolve => {
	someHeavyOperation(resolve);
});

// `someHeavyOperation` is not yet called

await doSomethingFun;

// `someHeavyOperation` is called
console.log(await lazyPromise);

API

new PLazy(executor)

Same as the Promise constructor. PLazy is a subclass of Promise.

PLazy.from(fn)

Create a PLazy promise from a promise-returning or async function.

PLazy.resolve(value)

Create a PLazy promise that is resolved with the given value, or the promise passed as value.

PLazy.reject(reason)

Create a PLazy promise that is rejected with the given reason.

版本列表
5.0.0 2024-10-28
4.0.0 2021-04-09
3.1.0 2021-01-10
3.0.0 2019-04-03
2.0.0 2019-03-16
1.0.0 2016-11-07