使用反应从页面导入数据

Question

I have a web application in react, and I have two registration page, one user and the next where you register a project, I need to get the user id that was registered on the previous page to register the project on the next page.

but I can't import the id because it's inside a function, so I can't get it

export default function Register({ history }) {
    const [username, setUsername] = useState('');
    const [email, setEmail] = useState('');
    const [passwd, setPasswd] = useState('');

    async function handleSubmit(e) {
        e.preventDefault();

        const response = await api.post('/createUser',  {
            username, email, passwd,
        });

        console.log(response.data);
        const { _id: _idUser } = response.data;

        history.push(`/freela/${_idUser}`);
    }

I'm trying to import like this

import { _idUser } from './Register';

And he returns me this error:

Routes:

Answer 1

I am taking that you are using react-router or react-router-dom for navigation.

For both the libraries you can pass some data as props for the next component like this in your case -

history.push( /freela/${_idUser} , _idUser);

and in your next component you can access it by

props.location.state

But the best way is to get it from params since you have that id in your url.

By using the useParams hook from react-router-dom ;

Link to an example - https://reacttraining.com/react-router/web/example/url-params

Answer 2

Quick suggestion: since you are pushing idUser in history.push('/freela/${_idUser} , you can probably extract _idUser from the URL