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@serverless-devs/progress-bar

v0.0.3-beta.2

Published

progress-bar for serverless-devs

Downloads

762

Readme

下载(@serverless-devs/progress-bar)

安装

$ npm install @serverless-devs/progress-bar --save

基本使用

import ProgressBar, { ProgressType } from '@serverless-devs/progress-bar';

const bar = new ProgressService(
  ProgressType.Loading,
  {
    total: 1000,
  }
);
for (let i = 0; i < 1000; i += 50) {
  bar.update(i);
}
bar.complete();

参数解析

import ProgressBar, { ProgressType } from '@serverless-devs/progress-bar';

const result = new ProgressService(
  type,
  options,
  format,
);

| 参数 | 说明 | 类型 | 必填 | 默认值 | | ------- | --------------- | ------- | ---- | ------ | | type | 进度条的显示方式 | ProgressType.Bar:总尺寸已知的进度条; ProgressType.Loading:总大小未知的加载样式 | 是 | - | | options | 进度条的选项 | Options | ProgressType.Bar 时必填 | - | | format | 进度条格式, 详见format | String | 否 | - |

Options

| 参数 | 说明 | 类型 | 必填 | 默认值 | | --------- | ------------ | ----------------------------- | ---- | ------------- | | total | 要完成的数据总数 | number | 是 | ProgressType.Loading 时默认 100 | | curr | 当前已完成索引 | number | 否 | - | | width | 进度条显示宽度 | number | 否 | {total} | | renderThrottle | 更新之间的最短时间(以毫秒为单位) | number | 否 | 16 | | stream | 输出流 | NodeJS.WritableStream | 否 | {process.stderr} | | head | 头部字符, 默认为完成字符 | string | 是 | {complete} | | complete | 完成字符 | string | 否 | = | | incomplete | 未完成字符 | string | 否 | - | | callback | 进度条完成时调用 | Function | 否 | - |

Format 简述

type 取值 ProgressType.Bar 时默认为 Loading ${green(':loading')} ((:bar)) :current/:total(Bytes) :percent :etas
type 取值 ProgressType.Loading 时默认为 Loading ${green(':loading')} ((:bar)) :etas

解析一下这段文字 Loading ${green(':loading')} ((:bar)) :current/:total(Bytes) :percent :etas

Loading 是一个显示前缀,可以替换为一些固定的文案。
green() 是引入的 chalk, 显示一下颜色效果
:loading['⣴', '⣆', '⢻', '⢪', '⢫'] 交替显示的一个动态效果
((:bar)) 是显示进度条,由参数 options.total 控制总长度,使用 result.update(curr) 修改显示完成度。
:current 显示当前完成度
:total 要完成的数据总数
:percent 完成的百分比
:etas 估计完成时间(以秒为单位)
:elapsed 经过的时间(以秒为单位)
:rate 每秒刻度数

result

result.update

更新进度状态

接受参数为 number 类型
返回值 无

示例:

result.update(50)

result.terminate

中断进度条显示,并在上面写一条消息(此条信息不会被删除)

接受参数 string 返回值 无

示例:

result.interrupt('终')

result.terminate

终止显示

接受参数 无
返回值 无

示例:

result.terminate()

result.complete

获取完成状态

接受参数 无
返回值 boolean

示例:

const complete = result.complete()

result.curr

获取当前已完成索引

接受参数 无
返回值 number

示例:

const curr = result.curr()

result.total

获取要完成的数据总数

接受参数 无
返回值 number

示例:

const total = result.total()