udemy-react-course/side-effects/src/components/Login/Login.js

89 lines
2.4 KiB
JavaScript

import React, { useState, useEffect } from "react";
import Card from "../UI/Card/Card";
import classes from "./Login.module.css";
import Button from "../UI/Button/Button";
const Login = (props) => {
const [enteredEmail, setEnteredEmail] = useState("");
const [emailIsValid, setEmailIsValid] = useState();
const [enteredPassword, setEnteredPassword] = useState("");
const [passwordIsValid, setPasswordIsValid] = useState();
const [formIsValid, setFormIsValid] = useState(false);
useEffect(() => {
const identifier = setTimeout(() => {
setFormIsValid(
enteredEmail.includes("@") && enteredPassword.trim().length > 6
);
}, 500);
return () => {
clearTimeout(identifier);
};
}, [enteredEmail, enteredPassword]);
const emailChangeHandler = (event) => {
setEnteredEmail(event.target.value);
};
const passwordChangeHandler = (event) => {
setEnteredPassword(event.target.value);
};
const validateEmailHandler = () => {
setEmailIsValid(enteredEmail.includes("@"));
};
const validatePasswordHandler = () => {
setPasswordIsValid(enteredPassword.trim().length > 6);
};
const submitHandler = (event) => {
event.preventDefault();
props.onLogin(enteredEmail, enteredPassword);
};
return (
<Card className={classes.login}>
<form onSubmit={submitHandler}>
<div
className={`${classes.control} ${
emailIsValid === false ? classes.invalid : ""
}`}
>
<label htmlFor="email">E-Mail</label>
<input
type="email"
id="email"
value={enteredEmail}
onChange={emailChangeHandler}
onBlur={validateEmailHandler}
/>
</div>
<div
className={`${classes.control} ${
passwordIsValid === false ? classes.invalid : ""
}`}
>
<label htmlFor="password">Password</label>
<input
type="password"
id="password"
value={enteredPassword}
onChange={passwordChangeHandler}
onBlur={validatePasswordHandler}
/>
</div>
<div className={classes.actions}>
<Button type="submit" className={classes.btn} disabled={!formIsValid}>
Login
</Button>
</div>
</form>
</Card>
);
};
export default Login;