Prerequisites

Install Node.js and npm, the standard package manager for javascript.

Creating the React App

Once installed Node.js, create a new React app by running the following command with Vite.

npm create vite@latest

Next, React app project name

√ Project name: ... Login_app

And give the package name

√ Package name: ... reactlogin

Select a Framework

? Select a framework: » – Use arrow keys. Return to submit.

Then select TypeScript

Open the application in vs code. Open the terminal in VS Code and run the following command

npm install

Run the application  npm run dev

Create file Login.tsx and login.css

import { useState } from 'react'
import './Login.css'
import { BrowserRouter as Routers, Routes , Route, Navigate } from 'react-router-dom'
import HomePage from '../Home'
 

// eslint-disable-next-line @typescript-eslint/no-unused-vars
function Login(){

  const [email, setEmail] = useState("")
  const[password, setPassword] = useState("")
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const[emailError, setEmailError] = useState("")
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const[passwordError,setPasswordError]= useState("")
//  const navigate = useNavigate();

  const onButtonClick = () =>{
    setEmailError("")
    setPasswordError("")

    if("" === email){
      setEmailError("Please enter your email")
      return
    }

    if("" === password)
    {
      setPasswordError("Please enter a password")
      return
    }
    if(password.length<7){
      setPasswordError("password must be 8 character or longer")
      return
    }

    if(!/^[\w-.]+@([\w-]+\.)+[\w-]{2,4}$/.test(email)){
      setEmailError("please enter a vlid email address")
      return
    }
   
    if(email){
      return(
      <>
      {
        <Routers>
          {
          <Routes>
            <Route path='/' element={<HomePage />}>

            </Route>
          </Routes>
    }
        </Routers>
      }
       
      </>
      )
    }else{
      return <Navigate to='/Component/Login/Login'/>
    }
  //navigate("../Home")

  }

    return(
        <div className="login-box">
  <h2>Login</h2>
  <form>
    <div className="user-box">
        <input  
        value={email}
        placeholder='Enter email address here' 
        onChange={ev=> setEmail(ev.target.value)}
        className={"user-box"}      
        
        />
      
      <label className='errorLabel'>{emailError}</label>
    </div>
    <div className="user-box">
      <input 
      value={password}
      placeholder='Enter password here'
      onChange={ev=>setPassword(ev.target.value)}
      className={'user-box'}
      
      />
      <label className='errorLabel'>{passwordError}</label>
    </div>
    <input onClick={onButtonClick}
      className={"inputButton"}
      type="button"      
      value={"Submit"}
    />
  </form>
</div>     
        
)
}

export default Login

Login.css

html {
  height: 100%;
}
body {
  margin:0;
  padding:0;
  font-family: sans-serif;
  background: linear-gradient(#141e30, #446891);
}

.login-box {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 400px;
  padding: 40px;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,.5);
  box-sizing: border-box;
  box-shadow: 0 15px 25px rgba(0,0,0,.6);
  border-radius: 10px;
}

.login-box h2 {
  margin: 0 0 30px;
  padding: 0;
  color: #fff;
  text-align: center;
}

.login-box .user-box {
  position: relative;
}

.login-box .user-box input {
  width: 100%;
  padding: 10px 0;
  font-size: 16px;
  color: #fff;
  margin-bottom: 30px;
  border: none;
  border-bottom: 1px solid #fff;
  outline: none;
  background: transparent;
}
.login-box .user-box label {
  position: absolute;
  top:0;
  left: 0;
  padding: 10px 0;
  font-size: 16px;
  color: #fff;
  pointer-events: none;
  transition: .5s;
}

.login-box .user-box input:focus ~ label,
.login-box .user-box input:valid ~ label {
  top: -20px;
  left: 0;
  color: #03e9f4;
  font-size: 12px;
}

.login-box form a {
  position: relative;
  display: inline-block;
  padding: 10px 20px;
  color: #03e9f4;
  font-size: 16px;
  text-decoration: none;
  text-transform: uppercase;
  overflow: hidden;
  transition: .5s;
  margin-top: 40px;
  letter-spacing: 4px
}

.login-box a:hover {
  background: #03e9f4;
  color: #fff;
  border-radius: 5px;
  box-shadow: 0 0 5px #03e9f4,
              0 0 25px #03e9f4,
              0 0 50px #03e9f4,
              0 0 100px #03e9f4;
}

.login-box a span {
  position: absolute;
  display: block;
}

.login-box a span:nth-child(1) {
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, #03e9f4);
  animation: btn-anim1 1s linear infinite;
}

@keyframes btn-anim1 {
  0% {
    left: -100%;
  }
  50%,100% {
    left: 100%;
  }
}

.login-box a span:nth-child(2) {
  top: -100%;
  right: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, transparent, #03e9f4);
  animation: btn-anim2 1s linear infinite;
  animation-delay: .25s
}

@keyframes btn-anim2 {
  0% {
    top: -100%;
  }
  50%,100% {
    top: 100%;
  }
}

.login-box a span:nth-child(3) {
  bottom: 0;
  right: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(270deg, transparent, #03e9f4);
  animation: btn-anim3 1s linear infinite;
  animation-delay: .5s
}

@keyframes btn-anim3 {
  0% {
    right: -100%;
  }
  50%,100% {
    right: 100%;
  }
}

.login-box a span:nth-child(4) {
  bottom: -100%;
  left: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(360deg, transparent, #03e9f4);
  animation: btn-anim4 1s linear infinite;
  animation-delay: .75s
}

@keyframes btn-anim4 {
  0% {
    bottom: -100%;
  }
  50%,100% {
    bottom: 100%;
  }
}

.mainContainer {
  flex-direction: column;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.titleContainer {
  display: flex;
  flex-direction: column;
  font-size: 64px;
  font-weight: bolder;
  align-items: center;
  justify-content: center;
}

.resultContainer, .historyItem { 
  flex-direction: row;
  display: flex;
  width: 400px;
  align-items: center;
  justify-content: space-between;
}

.historyContainer {
  flex-direction: column;
  display: flex;
  height: 200px;
  align-items: center;
  flex-grow: 5;
  justify-content: flex-start;
}

.buttonContainer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 260px;
}

.inputContainer {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.inputContainer > .errorLabel {
  color: red;
  font-size: 12px;
}

.inputBox {
  height: 48px;
  width: 400px;
  font-size: large;
  border-radius: 8px;
  border: 1px solid grey;
  padding-left: 8px;
}
input[type="button"] {
  border: none;
  background: cornflowerblue;
  color: white;
  padding: 12px 24px;
  margin: 8px;
  font-size: 15px;
  border-radius: 8px;
  cursor: pointer;
}

Open the App.tsx and call the login function

import './App.css'
import Login from './Login'

function MyApp() {

  return (
    <>
    <Login  />     
    </>
  )
}

export default MyApp

Run the application

npm run dev

See More: React Conference 2023 / 2024

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