React Application Login Page Form Template with Validations

Hello friends, welcome back to my blog. Today in this blog post, I am going to show you, React Application Login Page Form Template with Validations.

For reactjs new comers, please check the below link:

Reactjs Basic Tutorials

Bootstrap 5 Tutorials

Friends now I proceed onwards and here is the working code snippet and please use this carefully to avoid the mistakes:

1. Firstly, we need fresh reactjs setup and for that, we need to run below commands into out terminal and also we should have latest node version installed on our system and bootstrap as well:

npx create-react-app reactdemo

cd reactdemo

npm install bootstrap

npm i @popperjs/core

npm start

2. Finally for the main output, we need to add below code into our reactdemo/src/App.js file or if you have fresh setup then you can replace reactdemo/src/App.js file code with below code:

import React from 'react'
import './App.css';
import 'bootstrap/dist/css/bootstrap.min.css';
import 'bootstrap/dist/js/bootstrap.min.js';
const defaultState = {
  name:null,
  email:null,
  password:null,
  nameError:null,
  emailError:null,
  passwordError:null
  }
  class CustomFormValidation extends React.Component{
    constructor(){
      super();
      this.state = defaultState;
      this.handleInputChange = this.handleInputChange.bind(this);
      }
      handleInputChange(event) {
      const target = event.target;
      var value = target.value;
      const name = target.name;
      this.setState({
      [name]: value
      });
      }
      validate(){
      let nameError = "";
      let emailError = "";
      let passwordError = "";
      if(!this.state.name){
      nameError = "Name field is required";
      }
      const reg = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
      if(!this.state.email || reg.test(this.state.email) === false){
      emailError = "Email Field is Invalid ";
      }
      if(!this.state.password){
      passwordError = "Password field is required";
      }
      if(emailError || nameError || passwordError){
      this.setState({nameError,emailError,passwordError});
      return false;
      }
      return true;
      }
      submit(){
      if(this.validate()){
      console.warn(this.state);
      this.setState(defaultState);
      }
      }
    render(){
      return(
        <div className="App">
          <div class="container-fluid ps-md-0">
              <div class="row g-0">
                <div class="d-none d-md-flex col-md-4 col-lg-6 bg-image"></div>
                <div class="col-md-8 col-lg-6">
                  <div class="login d-flex align-items-center py-5">
                    <div class="container">
                      <div class="row">
                        <div class="col-md-9 col-lg-8 mx-auto">
                          <h3 class="login-heading mb-4">Welcome back!</h3>
            
                          
                          <form>
                            <div class="form-floating mb-3">
                              <input type="email" className={"form-control " + (this.state.emailError ? 'invalid' : '')} id="floatingInput" name='email' placeholder="name@example.com" value={this.state.email} onChange={this.handleInputChange} />
                              <label for="floatingInput">Email address</label>
                              <span className="text-danger">{this.state.emailError}</span>
                            </div>
                            <div class="form-floating mb-3">
                              <input type="password" className={"form-control " + (this.state.passwordError ? 'invalid' : '')} id="floatingPassword" name="password" placeholder="Password" value={this.state.password} onChange={this.handleInputChange} />
                              <label for="floatingPassword">Password</label>
                              <span className="text-danger">{this.state.passwordError}</span>
                            </div>
            
                            <div class="form-check mb-3">
                              <input class="form-check-input" type="checkbox" value="" id="rememberPasswordCheck" />
                              <label class="form-check-label" for="rememberPasswordCheck">
                                Remember password
                              </label>
                            </div>
            
                            <div class="d-grid">
                              <button class="btn btn-lg btn-primary btn-login text-uppercase fw-bold mb-2" type="button" onClick={()=>this.submit()}>Sign in</button>
                              <div class="text-center">
                                <a class="small" href="#">Forgot password?</a>
                              </div>
                            </div>
            
                          </form>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
            </div>
        </div>
 )  
}
}
export default CustomFormValidation;

3. Finally for the main output, we need to add below code into our reactdemo/src/App.css file:

.login {
  min-height: 100vh;
}

.bg-image {
  background-image: url('https://source.unsplash.com/WEQbe2jBg40/600x1200');
  background-size: cover;
  background-position: center;
}

.login-heading {
  font-weight: 300;
}

.btn-login {
  font-size: 0.9rem;
  letter-spacing: 0.05rem;
  padding: 0.75rem 1rem;
}
.invalid
{
  border-color: red!important;
}

Now we are done friends. If you have any kind of query or suggestion or any requirement then feel free to comment below.

Note: Friends, I just tell the basic setup and things, you can change the code according to your requirements.

I will appreciate that if you will tell your views for this post. Nothing matters if your views will be good or bad.

Jassa

Thanks