javascript - AsyncStorage 未定义检查

Question

如何确定 asyncstorage 是否在

错误拒绝

if (await AsyncStorage.getItem("id") == undefined){
    alert("yes");
}

标签： javascriptreact-nativeexpo

Answer 1

实现这一点的更优雅的方法是：

const id = await AsyncStorage.getItem("id")   // Get the item reference of ID if exists

if (id) {
   // Do what you want if ID is actually there
} else {
   // Do what you want if ID is not there
}