内容摘自 navie vue3 typescript admin ui
// 默认缓存期限为7天
const DEFAULT_CACHE_TIME = 60 * 60 * 24 * 7;
/**
* 创建本地缓存对象
* @param {string=} prefixKey -
* @param {Object} [storage=localStorage] - sessionStorage | localStorage
*/
export const createStorage = ({ prefixKey = '', storage = localStorage } = {}) => {
/**
* 本地缓存类
* @class Storage
*/
const Storage = class {
private storage = storage;
private prefixKey?: string = prefixKey;
private getKey(key: string) {
return `${this.prefixKey}${key}`.toUpperCase();
}
/**
* @description 设置缓存
* @param {string} key 缓存键
* @param {*} value 缓存值
* @param expire
*/
set(key: string, value: any, expire: number | null = DEFAULT_CACHE_TIME) {
const stringData = JSON.stringify({
value,
expire: expire !== null ? new Date().getTime() + expire * 1000 : null,
});
this.storage.setItem(this.getKey(key), stringData);
}
/**
* 读取缓存
* @param {string} key 缓存键
* @param {*=} def 默认值
*/
get(key: string, def: any = null) {
const item = this.storage.getItem(this.getKey(key));
if (item) {
try {
const data = JSON.parse(item);
const { value, expire } = data;
// 在有效期内直接返回
if (expire === null || expire >= Date.now()) {
return value;
}
this.remove(this.getKey(key));
} catch (e) {
return def;
}
}
return def;
}
/**
* 从缓存删除某项
* @param {string} key
*/
remove(key: string) {
this.storage.removeItem(this.getKey(key));
}
/**
* 清空所有缓存
* @memberOf Cache
*/
clear(): void {
this.storage.clear();
}
/**
* 设置cookie
* @param {string} name cookie 名称
* @param {*} value cookie 值
* @param {number=} expire 过期时间
* 如果过期时间为设置,默认关闭浏览器自动删除
* @example
*/
setCookie(name: string, value: any, expire: number | null = DEFAULT_CACHE_TIME) {
document.cookie = `${this.getKey(name)}=${value}; Max-Age=${expire}`;
}
/**
* 根据名字获取cookie值
* @param name
*/
getCookie(name: string): string {
const cookieArr = document.cookie.split('; ');
for (let i = 0, length = cookieArr.length; i < length; i++) {
const kv = cookieArr[i].split('=');
if (kv[0] === this.getKey(name)) {
return kv[1];
}
}
return '';
}
/**
* 根据名字删除指定的cookie
* @param {string} key
*/
removeCookie(key: string) {
this.setCookie(key, 1, -1);
}
/**
* 清空cookie,使所有cookie失效
*/
clearCookie(): void {
const keys = document.cookie.match(/[^ =;]+(?==)/g);
if (keys) {
for (let i = keys.length; i--; ) {
document.cookie = keys[i] + '=0;expire=' + new Date(0).toUTCString();
}
}
}
};
return new Storage();
};
export const storage = createStorage();
export default Storage`;