uniapp getStorageSync，setStorageSync，removeStorageSync，clearStorageSync如何封装缓存进行取值，赋值，移除，清空

//取值
function get(key,sync = true) {try {if(sync){return uni.getStorageSync(key);}else{let data = '';uni.getStorage({key:key,success: function (res) {data = res.data;}});return data;}} catch (e) {return false;}
}//赋值
function set(key, value, sync = true) {try {if (sync) {return uni.setStorageSync(key, value);} else {uni.setStorage({key: key,data: value});}} catch (e) {}
}//移除
function del(key, sync = true){try {if (sync) {return uni.removeStorageSync(key);} else {uni.removeStorage({key: key});}} catch (e) {return false;}
}//清空
function clear(sync = true){try {if (sync) {return uni.clearStorageSync();} else {uni.clearStorage();}} catch (e) {return false;}
}