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Cuando trato de desestructurar mi objeto de estado en el mecanografiado de reacción, aparece un error `El objeto es posiblemente 'indefinido'`

Cuando trato de desestructurar mi objeto de estado en el mecanografiado de reacción, obtengo un error Object is possibly 'undefined' . Si uso el encadenamiento opcional, obtengo este error const newUser: NewUser | undefined Argument of type 'string | undefined' is not assignable to parameter of type 'string'. Type 'undefined' is not assignable to type 'string'.

El error se muestra cuando intento desestructurar el objeto RegisterUser(newUser?.email, newUser?.password, newUser?.name, navigate)

Mi código:

 type NewUser ={ name: string, email: string, password: string, navigate: string } const Register = () => { const [newUser, setNewUser] = useState<NewUser>() // single object will return const [RegisterUser] = UseFirebase() const navigate = useNavigate() const handleValues = (e: any) => { const field = e.target.name; const value = e.target.value const user: any = { ...newUser } user[field] = value setNewUser(user) } const handleRegister = (e: any) => { e.preventDefault() // ERROR RegisterUser(newUser.email, newUser.password, newUser.name, navigate) // console.log('user name', newUser.name, newUser.email, newUser.password); } .......

¿Podría alguien decirme qué tipo de error cometí?

about 4 years ago · Juan Pablo Isaza
2 answers
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0

Bueno, en el script mecanografiado para yaa, primero debe verificar que no obtendrá un valor indefinido simplemente haciendo una verificación de condición como esta

 const handleRegister = (e: any) => { e.preventDefault() if (newUser?.email && newUser?.password && newUser?.name) { RegisterUser(newUser.email, newUser.password, newUser.name, navigate) } else { // show some error handling here or error to user that he didnt enter value etc } }
about 4 years ago · Juan Pablo Isaza Report

0

Si su objeto no está indefinido, debe intentar

 RegisterUser(newUser!.email, newUser!.password, newUser!.name, navigate)
about 4 years ago · Juan Pablo Isaza Report
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