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This is the code I have working right now from this answer, whose comments suggested using window.history
. It works, but I’d prefer to go back correctly, using React router v6.
import {useNavigate} from "react-router-dom"; import Cookies from "universal-cookie"; function Foo() { const navigate = useNavigate(); const cookies = new Cookies(); if (cookies.get('foo') === 'bar') { window.history.go(-1); // () => navigate(-1); // this does not work } return ( <div /> ) }
You can see commented out what I wanted to do, but that’s not legal I think. And if I just use navigate(-1)
it doesn’t work, like the original question I linked.
So is there a way to use navigate
inside Foo
?
Answer
() => navigate(-1); // this does not work
This defines a function which will call navigate(-1)
when it is called.
You never call it.
The dirty approach is to simply not wrap it in a function, but the main render function of a component shouldn’t have side effects.
Wrap it in an effect hook instead.
const Foo = () => { const navigate = useNavigate(); const cookies = new Cookies(); const foo = cookies.get('foo'); useEffect(() => { if (foo === 'bar') { navigate(-1); } }, [foo, navigate]); return ( <div /> ); };
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