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My usestate hook variable becomes a function later on. but

it remains undefined and causes errors. how can i fix it?

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Mega- Автор вопроса

this one

Please be concrete. When does it become a function "later on" and why and when is it "undefined"?

Mega
this one

Show how u initialize and update it

Mega- Автор вопроса
Misan
Please be concrete. When does it become a function...

It is initially undefined. Later it becomes a function. const [component, setComponent] = useState(undefined); const [conn, setConn] = useState(undefined); setConn(() => { let ws = new Connection(con => con, data => { component.writeData(data) }, () => { component.dispose(); }) return ws; }

Mega
It is initially undefined. Later it becomes a func...

Three back quote is needed for multiple lines instead of one

Mega- Автор вопроса
Mega- Автор вопроса
steve raphael
Show how u initialize and update it

It was undefined with useState(undefined);

Mega- Автор вопроса
Mega
It is initially undefined. Later it becomes a func...

When I receive a websocket data, it says component is undefined. It was undefined, but not anymore.

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