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zpromise

v1.5.4

Published

ES6 Promise简化包装器,用于增强Promise功能和易用性

Downloads

8

Readme

Install

npm install zpromise

特性

  • 消除Promise注入函数,可通过Promise实例直接访问resolve()或reject()

  • 支持获取当前Promise实例状态

  • 支持Promise超时触发reject()

  • 支持Promise快速解除、重置

示例

const zPromise = require('zpromise');

async function () {

   let promise = new zPromise()

   setTimeout(() => {

      if (error) {
         promise.reject(error)
      } else {
         promise.resolve(data)
      }

   }, 1000);

   await promise.catch(error => {
      console.error(error)
   })

}

超时

const timerPromise = require('zpromise/timer');

async function run(params) {

   let promise = new timerPromise(3000)

   console.log(promise.state)
   
   await promise.catch(error => {
      console.error(error)
   })

   console.log(promise.state)

}

run()

重置

const restartPromise = require('zpromise/restart');

async function run(params) {

   let p1 = new restartPromise(3000 , error => {
      console.warn('等待超时')
   })

   await p1.catch(error => {
      console.error(error)
   })

   let p2 = p1.restart()

   p2.then(data => {
      console.error(data)
   }).catch(error => {
      console.error(error)
   })

   setTimeout(() => {

      p2.reject()
      
   }, 1000);

}

run()

API

zPromise()

Promise简化包装,提供resolve、reject绑定和状态查询

zPromise.prototype.state

Promise实例状态,包含pending、resolve、reject三种状态

zPromise.prototype.resolve(data)

对应Promise注入函数中的resolve()

zPromise.prototype.reject(error)

对应Promise注入函数中的reject()

timerPromise(delay, catchFunc)

在zPromise基础上增加了定时器功能,在等待超时后自动调用预设的reject()或resolve(),原型属性与zPromise一致。

  • delay Number 超时时间,单位ms,可选

  • catchFunc Function 异常捕获回调函数

restartPromise.prototype.restart()

重置Promise,将原来的Promise改为resolve状态,并使用之前的配置项创建新的Promise实例