How do I pass useState from one component to another?-CodePudding

I am trying to make a login modal that changes to the signup modal when the signup button is clicked within the Login.js. Currently, I have a header with a login button. When the login button is clicked, the current state is displayed (default value is ). I would like the signup button within Login.js to be able to update the state in order for that modal to .

Header.js:

import React, { useState } from 'react';
import Login from "../modals/Login";
import Signup from "../modals/Signup";

export default function Header() {

    const [lmodal, setModal] = useState(<Login />);

    return (
...
    {lmodal}
...
)
}

import React, { useState } from 'react';
import Signup from "../modals/Signup";

export default function Login() {

return (
...
**// Clicking the button should change the state from Header.js to <Signup />**
 <button onClick={() => { setModal(<Signup />) }} className="btn btn-primary">Signup</button>
...
)
}

Thanks for the help in advance!

CodePudding user response：

States and components are different in concept. What you coould possible do to reach the wanted behavior is to use the state to toogle the component, for exemple:

import React, { useState } from 'react';
import Login from "../modals/Login";
import Signup from "../modals/Signup";

export default function Header() {

    const [modal, setModal] = useState(false);

    return (
...
    {modal && <Login />}
    <Signup modal={modal} setModal={setModal}/>
...
)}

import React, { useState } from 'react';
import Signup from "../modals/Signup";

export default function Login({modal, setModal}) {

return (
...
 <button onClick={() => setModal(true)} className="btn btn-primary">Signup</button>
...
)
}

CodePudding user response：

you can't setModal from within the Login component because setModal is in the Header component.