pinia 三、插件

自定义Pina插件

• 用于缓存state ,
• 页面刷新数据不会丢失

const __piniaKey = '__PINIAKEY__'
//定义兜底变量
 
 
type Options = {
   key?:string
}
//定义入参类型
 
 
 
//将数据存在本地
const setStorage = (key: string, value: any): void => {
 
localStorage.setItem(key, JSON.stringify(value))
 
}
 
 
//存缓存中读取
const getStorage = (key: string) => {
 
return (localStorage.getItem(key) ? JSON.parse(localStorage.getItem(key) as string) : {})
 
}
 
 
//利用函数柯丽华接受用户入参
const piniaPlugin = (options: Options) => {
 
//将函数返回给pinia  让pinia  调用 注入 context
return (context: PiniaPluginContext) => {
 
const { store } = context;
 
const data = getStorage(`${options?.key ?? __piniaKey}-${store.$id}`)
 
store.$subscribe(() => {
 
setStorage(`${options?.key ?? __piniaKey}-${store.$id}`, toRaw(store.$state));
 
})
 
//返回值覆盖pinia 原始值
return {
 
...data
 
}
 
}
 
}
 
 
//初始化pinia
const pinia = createPinia()
 
 
//注册pinia 插件
pinia.use(piniaPlugin({
 
key: "pinia"
 
}))

参考: 链接