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promise-extends

v1.0.2

Published

promise的扩展

Readme

promise-extends

介绍

promise-extends是基于Promise现有方法的一个扩展库。

##安装

npm i promise-extends

快速上手

初始化

import {PromiseExtends} from 'promise-extends

PromiseExtends.extend([options])

options:可配置项

{
   isExtend: boolean // 默认是true
} 

使用

Promise.limit:限流。

Promise.limit([fn1(), fn2(), fn3()], {limitNumber: 2})

Promise.allow:执行的函数数组中,允许某几个执行失败。

Promise.allow([fn1(), fn2(), fn3(), fn4(), fn5()], [1, 3])

如果不指定某几个,则会认为只要有一个执行成功,就会返回;

返回时的数据结构为:

[
  {isDone: boolean //是否成功, data: any // 返回的数据,包括成功或者失败的数据 }
]

Promise.shake: 防抖动

const fn = Promise.shake(fn);

fn().then(d => d).catch(e => throw e)

调用多次fn,最终也只会执行第一此调用的fn返回的promise。

Promise.prototype.done

const fn = () => {
    return new Promise((res, rej) => rej());
}

fn().then().done(success, fail)