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@zyyz/vue-async-data

v1.0.10

Published

fetch data from remote

Readme

vue-async-data

Get Start

Installation

npm i --save @zyyz/vue-async-data

example

import AsyncDataMixin from '@zyyz/vue-async-data'
{
  name: 'app',
  mixins: [AsyncDataMixin],
  asyncData: {
    message: {// data name
      watch:['id'],// 监听某些状态,触发刷新
      init () {// 初始化data
        return ''
      },
      fetch () {// 异步拉取数据,需要返回一个Promise
        return new Promise((resolve) => {
          setTimeout(() => {
            resolve('hello world')
          }, 1000)
        })
      },
      error (response) {
        
      }
    },
    otherSomeData: {
      init () {
        return 1
      },
      fetch () {
        return new Promise((resolve, reject) => {
          ..........
        })
      }
    }
  
  },
  data () {
    return {
      id: 0
    }
  },
  methods: {
    refresh () {// 强制刷新
      this.$async.fetch('message')
      this.$async.fetch('otherSomeData')
    },
    suspend () {
      this.$async.suspend()
    },
    resume () {
      this.$async.resume()
    }
  }
}

Description

一个用来异步加载数据的vue插件,模仿了nuxt.js的aysncData。
init和fetch这两个选项是必填的,fetch函数返回的必须是一个Promise对象。watch选项可以watch一个或多个data、prop或computed,其实就是利用了$watch()。
请求数据的时机是activated和mounted这两个生命周期钩子。fetch和error中的this是当前的vm对象,和method一样。
asyncData和data一样支持mixin。
如果想强制刷新数据,可以调用this.$fetch('dataName')

details

延时刷新:
异步数据的拉取和vue的render机制差不多,其内部存在一个队列。一个异步数据需要被拉取时,它会加入到队列中。队列会在nextTick中被执行,这样就实现了一个delay机制,防止在一个tick中重复刷新。
队列控制:
为了精准控制是否刷新,本插件提供了api,以便对队列进行控制。
this.$async.suspend() 可以将队列挂起,队列不会在nextTick中自动执行,即暂停了自动刷新机制
this.$async.resume() 结束挂起状态,恢复自动刷新机制,如果当前有挂起的队列,则立即执行队列
this.$async.clean() 可以清空队列
强制刷新:
this.$async.fetch('dataName') 强制将一个异步数据加入到队列当中

rollup

已经用rollup对src目录下的代码进行了打包,并用babel转译了一下。但是Promise等polyfill没有做处理。

源码构建

npm run build