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seq-fns

v0.0.1

Published

sequence function invoke

Downloads

6

Readme

seq

这是一个简单的方法链式调用库

安装

npm i seq

yarn add seq

使用

const seq = require('seq')

seq([
  x => x + 1,
  async x => x + 2,
  x => new Promise(resolve => setTimeout(() => resolve(x + 3), 500)),
])
  .run(1)
  .then(result => console.log(result))

// 7 (1 + 1 + 2 + 3)

你可以通过 add 方法动态增加处理函数

seq.add(x => x + 1)

seq 会根据传入函数的顺序依次执行,并且把上一次处理的结果作为下一个函数的参数传入,函数可以是同步的也可以是异步的,最终 run 方法都会返回的一个 promise 并返回调用结果

错误处理

seq([
  x => x + 1,
  x => {
    throw x
  },
])
  .run(1)
  .catch(err => console.log(err))

// 2

任何在执行过程中的报错都可以在返回的promise中被捕获,包括:

  • 同步 throw 的错误
  • promise reject 的错误
  • 异步方法 throw 的错误

roadmap

  1. 增加多参数的场景
  2. 增加回调形式的异步函数