dwui
Version:
a part of wrapper on iView UI
68 lines (63 loc) • 1.89 kB
JavaScript
/**
* 浏览器本地缓存工具类
*/
/**
* 缓存数据到localstorage
* @param cacheKey 缓存数据的key
* @param cacheScope 缓存数据的scope，相当于二级key，用来对同一个cacheKey下面的数据进行二次划分隔离，避免出现当前用户读取到上一个用户的缓存数据
* @param cacheData 需要缓存的数据
*/
export const setLocalStorageCacheData = (cacheKey, cacheScope, cacheData) => {
if (!cacheScope) {
cacheScope = 'default'
}
let existCacheData = localStorage[cacheKey]
if (!existCacheData) {
let initObject = {}
initObject[cacheScope] = cacheData
localStorage[cacheKey] = JSON.stringify(initObject)
} else {
let cacheKeyData = JSON.parse(existCacheData)
cacheKeyData[cacheScope] = cacheData
localStorage[cacheKey] = JSON.stringify(cacheKeyData)
}
}
/**
* 从localstorage 中获取缓存的值
* @param cacheKey 缓存的key
* @param cacheScope 缓存的scope，详情看set方法中的解释
* @param defaultValue 不存在时，返回的默认值
* @return {*}
*/
export const getLocalStorageCacheData = (cacheKey, cacheScope, defaultValue) => {
if (!cacheScope) {
cacheScope = 'default'
}
let existCacheData = localStorage[cacheKey]
if (!existCacheData) {
return defaultValue
} else {
let cacheKeyScopeData = JSON.parse(existCacheData)[cacheScope]
if (cacheKeyScopeData) {
return cacheKeyScopeData
} else {
return defaultValue
}
}
}
/**
* 设置打点的树节点
* @param openTrees
* @param cacheScope
* @param 缓存有效域
*/
export const setOpenTreeItem = (cacheScope, openTrees) => {
setLocalStorageCacheData('openTrees', cacheScope, openTrees)
}
/**
* 返回打点的树节点信息
* @return {any}
*/
export const getOpenTreeItem = (cacheScope) => {
return getLocalStorageCacheData('openTrees', cacheScope, [])
}