--封装本地存储和会话存储
--调用
--导入模块 import {storage} from ''
--使用本地.get 会话 .session.get
--ts
interface StorageInterface {
//设置localStorage
set: (key: string, value: any) => void;
//获取localStorage,默认会自动转json
get: (key: string, isJson?: boolean) => string | Record<any, any>;
//是否含有key
has: (key: string, isJson?: boolean) => boolean;
//移除
remove: (key: string) => void;
}
interface SessionStorageInterface extends StorageInterface {
//提供session操作接口
session: StorageInterface;
}
const storage: SessionStorageInterface = {} as SessionStorageInterface;
//加方法
const extend = (s: Storage): StorageInterface => {
return {
set(key, value) {
if (typeof value == "object") {
s.setItem(key, JSON.stringify(value));
} else {
s.setItem(key, value);
}
if (value == undefined || value == null) {
s.removeItem(key);
}
},
get(key, isJson = true) {
const item = s.getItem(key) as string;
try {
if (isJson) {
let ret = JSON.parse(item);
//JSON.parse 可以转基本类型，不报错。。。，所以这里判断一下
if (typeof ret !== 'object') {
return undefined;
}
return ret;
}
} catch (e) {
//解析出错,则证明不是json字符串，返回undefined
return undefined;
}
return item;
},
has(key,isJson=false) {
return !!(this.get(key,isJson) as string | Record<any, any>);
},
remove: (key) => {
s.removeItem(key);
},
};
};
Object.assign(storage, extend(window.localStorage));
Object.assign(storage, {
session: extend(window.sessionStorage),
});
export default storage;
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