vuex5中的Pinia插件机制

import { createPinia } from 'pinia'
const pinia = createPinia()

function SecretPiniaPlugin(context) {
context.pinia;  pina实例`createPinia()`
context.app;  vue实例`createApp()`
context.store;   正在配置的store
context.options;  store的配置`defineStore()`

context.store.hello = ref('secret');
context.store.hello;

const globalSecret = ref('secret')

store.secret = globalSecret

store.$state.secret = globalSecret

store.router = markRaw(router)

  store.$subscribe(() => {
  store改变时触发
  })
  store.$onAction(() => {
     action触发时触发
  })
...
}

pinia.use(SecretPiniaPlugin)

pinia.use(({ store }) => ({
  store.hello = 'world'
}))

pinia.use(({ store }) => {
  store.hello = 'world'
  if (process.env.NODE_ENV === 'development') {
    store._customProperties.add('hello')
  }
})

function SecretPiniaPlugin() {
  return { secret: 'the cake is a lie' }
}
pinia.use(SecretPiniaPlugin)

defineStore('search', {
  actions: {
    searchContacts() {
    },
  },
  debounce: {
    searchContacts: 300,
  },
})

defineStore(
  'search',
  () => {
    ...
  },
  {
    // this will be read by a plugin later on
    debounce: {
      // debounce the action searchContacts by 300ms
      searchContacts: 300,
    },
  }
)

import debounce from 'lodash/debunce'
pinia.use(({ options, store }) => {
  if (options.debounce) {
  
    将设置了debounce的store中的原action改写成具有防抖功能的action
    
    return Object.keys(options.debounce).reduce((debouncedActions, action) => {
      debouncedActions[action] = debounce(
        store[action],
        options.debounce[action]
      )
      return debouncedActions
    }, {})
  }
})