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[英]A component is changing an uncontrolled input of type email to be controlled. Input elements should not switch from uncontrolled to controlled
[英]A component is changing a controlled input of type text to be uncontrolled. Input elements should not switch from controlled to uncontrolled
這是SignIn Component
。 我正在使用 Firebase 概念。 用於設計目的的材料 UI。 我正在使用功能組件。
對用戶進行身份驗證的方法是否正確?我遇到了一個錯誤。
import React, { useState } from "react";
import Avatar from "@material-ui/core/Avatar";
import Button from "@material-ui/core/Button";
import CssBaseline from "@material-ui/core/CssBaseline";
import TextField from "@material-ui/core/TextField";
import LockOutlinedIcon from "@material-ui/icons/LockOutlined";
import Typography from "@material-ui/core/Typography";
import { makeStyles } from "@material-ui/core/styles";
import Container from "@material-ui/core/Container";
import Firebase from "../services/Firebase";
const Signin = () => {
const [values, setValues] = useState({email: "",password: ""})
const useStyles = makeStyles(theme => ({
paper: {
marginTop: theme.spacing(8),
display: "flex",
flexDirection: "column",
alignItems: "center"
},
avatar: {
margin: theme.spacing(1),
backgroundColor: theme.palette.secondary.main
},
form: {
width: "100%", // Fix IE 11 issue.
marginTop: theme.spacing(1)
},
submit: {
height: 48,
padding: "0 15px",
margin: theme.spacing(7)
}
}));
const classes = useStyles();
const signin = (e) => {
e.preventDefault();
Firebase.auth().signInWithEmailAndPassword(values.email, values.password).then((u) => {
console.log(u)
}).catch((err) => {
console.log(err);
})
}
const signup = (e) => {
e.preventDefault();
Firebase.auth().createUserWithEmailAndPassword(values.email, values.password).then((u) => {
console.log(u)
}).catch((err) => {
console.log(err);
})
}
const handleChange = (e) => {
setValues({
[e.target.name]: e.target.value
})
}
return (
<Container component="main" maxWidth="xs">
<CssBaseline />
<div className={classes.paper}>
<Avatar className={classes.avatar}>
<LockOutlinedIcon />
</Avatar>
<Typography component="h1" variant="h5">
Sign in
</Typography>
<form className={classes.form} noValidate>
<TextField
variant="outlined"
margin="normal"
required
fullWidth
placeholder="Enter Email.."
onChange={(e) => handleChange(e)}
value={values.email}
/>
<TextField
variant="outlined"
margin="normal"
required
fullWidth
placeholder="Enter Password.."
type="password"
onChange={(e) => handleChange(e)}
value={values.password}
/>
<Button
type="submit"
margin="normal"
variant="contained"
color="primary"
className={classes.submit}
onClick={(e) => signin(e)}
>
Sign In
</Button>
<Button
type="submit"
margin="normal"
variant="contained"
color="primary"
className={classes.submit}
onClick={(e) => signup(e)}
>
Sign Up
</Button>
</form>
</div>
</Container>
)
}
export default Signin;
此Firebase
組件
import firebase from 'firebase';
require('firebase/app')
require('firebase/auth')
const Firebase = firebase.initializeApp({
apiKey: "AIzaSyC_3KRb7H0Xw1-DGfqAzqfxeZaw3W5PaLg",
authDomain: "my-login-page-react.firebaseapp.com",
databaseURL: "https://my-login-page-react.firebaseio.com",
projectId: "my-login-page-react",
storageBucket: "my-login-page-react.appspot.com",
messagingSenderId: "415587749418",
appId: "1:415587749418:web:ee026252bc0a64c1a57d53"
});
export default Firebase;
問題可能是由您保留值的方式引起的。 您使用 1 個鈎子處理 2 個值。 你打電話時
setValues({
[e.target.name]: e.target.value
})
它可能會覆蓋先前具有 2 個值和 1 個值的值,電子郵件或密碼,因此其中一個變得無法識別並且
//This is an uncontrolled component
<TextField
variant="outlined"
margin="normal"
required
fullWidth
placeholder="Enter Email.."
onChange={(e) => handleChange(e)}
value={unidentified}
/>
嘗試將您的價值觀分開為:
[email,setEmail] : useState("");
[password,setPassword] : useState("")
這將刪除初始的 object 密鑰對,使TextField中的 value={values.*} 不受控制。
setValues({
[e.target.name]: e.target.value
})
要覆蓋保留較早的 object 密鑰對,請使用擴展操作 -
setValues({...values,
[e.target.name]: e.target.value
})
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