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dd-stores

v1.0.2

Published

钉钉小程序多状态管理 - 解决跨页面跨组件间通信,简洁小巧高性能(适用于支付宝等阿里系小程序)

Readme

dd-stores - 钉钉小程序多状态管理

前言

随着应用复杂度增加,以及产品经理放飞自我的神奇脑洞,dd-store应对起来已经不是那么友好。同事也反馈,有些页面越来越复杂,store变得越来越臃肿,想拆分store,又比较繁琐。之后我细想了一下,其实主要原因是dd-store是以页面为维度,一个页面对应一个store,页面间共享的状态只能提到全局store上,或者两个页面共用同一个store,这样其实很不灵活,而且一堆互不相关的状态集合到一起,会使全局或共用的store臃肿杂乱。如果页面/组件支持多store,那我们就可以将之前臃肿的store拆分出各种各样的独立的store,然后在页面/组件使用的时候,只需按需引入对应store即可,这样就很好解决了现在的问题。

dd-stores支持页面/组件引入多个store。相比dd-store,配置和使用更简单,store定义更灵活,更加便于拓展和维护。而且页面、组件与store完全解耦,几乎零侵入性。

安装

npm i dd-stores --save

API

  • create.Page(stores, option) 创建页面
  • create.Component(stores, option) 创建组件
  • this.update() 更新页面或组件,在页面、组件、store内使用
  • store.update() 其他js文件中使用,需要引入相应的store 【注意:update已作为更新函数被占用,所以在store、页面、组件上不要重定义update字段,避免覆盖】

使用

创建store

store其实是一个包含data属性的对象,可以使用任意方式来定义该对象。 注:计算属性中的this指向store.data对象。

class Store {

  data = {
    title: '小程序多状态管理',
    language: "zh_cn",
    userName: '李狗蛋',
    deptName: '化肥质检部门',
    corpName: '富土康化肥厂',
    // 函数属性 - 可直接绑定到视图上
    description() {
      return `我是${this.userName},我在${this.corpName}工作`
    },
    a: {
      b: {
        // 深层嵌套也支持函数属性
        c() {
          return this.language + this.description
        }
      }
    }
  }

  onChangeLang() {
    if(this.data.language === 'zh_cn') {
      this.data.language = 'en_US'
    } else {
      this.data.language = 'zh_cn'
    }
    this.update()
  }
}

export default new Store()

创建页面

使用create.Page(stores, option)创建页面。其中stores是一个对象,用来绑定对应的store,以及定义该store在axml视图上使用的字段名,注意:该字段名在axml视图上使用时,并不是指向store,而是指向store.data。另外定义该字段名注意不要和现有的私有变量同名。

import create from 'dd-stores'
import globalStore from '/stores/globalStore'
import indexStore from '/stores/indexStore'

// 字段名可随意命名,但注意不要和页面data内的私有变量同名
const stores = {
  '$index': indexStore, // axml视图上使用$index.xxx即对应indexStore.data.xxx的值。
  '$data': globalStore, // 同上
}

create.Page(stores, {
  onLoad() {},
  data: {},
  handleChangeTitle() {
    globalStore.data.title = '新标题'
    this.update()
  },
  handleChangeName() {
    indexStore.changeName() // 如果changeName方法内调用了update方法,此处可以省去调用this.update()
  }
});

创建组件

使用create.Component(stores, option)创建组件。使用和create.Page一样。

import create from 'dd-stores'
import globalStore from '/stores/globalStore'
import indexStore from '/stores/indexStore'

const stores = {
  '$index': indexStore,
  '$data': globalStore,
}

create.Component(stores, {
  didMount() {},
  data: {},
  methods: {
    handleChangeTitle() {
      globalStore.data.title = '新标题'
      this.update()
    },
    handleChangeName() {
      indexStore.changeName()
    }
  }
});

axml视图上使用

简单示例:

<view>
  <view>{{$index.title}}</view>
  <view>{{$index.a.b}}</view>
  <view>{{$data.language}}</view>
  <view>{{$data.description}}</view>
</view>

更新状态

直接更改对应store.data内的值,最后调用this.upadte()即可,非常人性化。

// 页面、组件内使用
store.data.language = 'zh_cn'
store.data.userName = '李狗蛋'
store.data.userList[0].name = '张三疯'
this.update() // 或使用store.update()
// store内使用
this.data.language = 'zh_cn'
this.data.userName = '李狗蛋'
this.data.userList[0].name = '张三疯'
this.update()
// 其他js文件使用
import store from '/stores/store'
store.data.language = 'zh_cn'
store.data.userName = '李狗蛋'
store.data.userList[0].name = '张三疯'
store.update()

快捷链接

在使用过程中如果遇到问题或有什么建议可以随时在Issues进行反馈,或钉钉联系我:linjinchun