Question

我有一个用户数组，我知道它有11个值，因为当我打印到控制台时它将显示所有数组元素。但是，当我使用-

users.map(printLog)

function printLog(item,index){console.log(item.text);}`

它返回11个未定义的值，有什么建议吗？

我正在用react编写它，而我正在使用的实际代码段是return <div>{users.map(user=> (<div key={user.id}>{user.text};</div>))}</div>;

更新：这是打印用户时返回的数组。（对不起，我最初没有包括在内）

{id: "5b27fd770fdd1f04b257dfc2", name: "Kylo Ren", complete: false, __typename: "User", Symbol(id): "User:5b27fd770fdd1f04b257dfc2"}
{id: "5b27fd7a0fdd1f04b257dfc3", name: "Kylo Ren", complete: false, __typename: "User", Symbol(id): "User:5b27fd7a0fdd1f04b257dfc3"}
{id: "5b28070eb9c7600551e5a1c0", name: "Kylo Ren", complete: false, __typename: "User", Symbol(id): "User:5b28070eb9c7600551e5a1c0"}
{id: "5b28076eb9c7600551e5a1c1", name: "Kylo Ren", complete: false, __typename: "User", Symbol(id): "User:5b28076eb9c7600551e5a1c1"}
{id: "5b2807f1b9c7600551e5a1c2", name: "Kylo Ren", complete: false, __typename: "User", Symbol(id): "User:5b2807f1b9c7600551e5a1c2"}
{id: "5b28082eb9c7600551e5a1c3", name: "Kylo Ren", complete: false, __typename: "User", Symbol(id): "User:5b28082eb9c7600551e5a1c3"}
{id: "5b28085cb8b563056546e737", name: "Kylo Ren", complete: false, __typename: "User", Symbol(id): "User:5b28085cb8b563056546e737"}
{id: "5b28085fb8b563056546e738", name: "Kylo Ren", complete: false, __typename: "User", Symbol(id): "User:5b28085fb8b563056546e738"}
{id: "5b28086ab8b563056546e739", name: "Kylo Ren", complete: false, __typename: "User", Symbol(id): "User:5b28086ab8b563056546e739"}
 {id: "5b280872b8b563056546e73a", name: "Kylo Ren", complete: false, __typename: "User", Symbol(id): "User:5b280872b8b563056546e73a"}
{id: "5b280da6a766dd058f73b3bf", name: "Ben", complete: false, __typename: "User", Symbol(id): "User:5b280da6a766dd058f73b3bf"}

Answer 1

您的用户对象没有text成员。尝试将user.text替换为user.name（这可能是您想要的，但尚不完全清楚）。

使用.text时，它返回未定义的值

1 个答案: