Form Validation in HTML – CodingNepal https://www.codingnepalweb.com CodingNepal is a blog dedicated to providing valuable and informative content about web development technologies such as HTML, CSS, JavaScript, and PHP. Fri, 12 May 2023 06:56:54 +0000 en-US hourly 1 https://wordpress.org/?v=6.4.2 How to Validate Email & Password in HTML CSS JavaScript https://www.codingnepalweb.com/javascript-email-password-validation/ https://www.codingnepalweb.com/javascript-email-password-validation/#respond Wed, 17 Aug 2022 21:11:20 +0000 https://www.codingnepalweb.com/?p=4164 How to Validate Email & Password in HTML CSS JavaScript

Hello friend, I hope you are doing and creating creative pieces of stuff. Today in this blog, you will learn How to Validate Email & Password in HTML CSS JavaScript. Although, I have a separate blog about Email Validation, Password Validation, and Password Show Hide, this time I’m going to add all these sections in one form.

Email and Password Validation means the process of verifying the email address and the strength of the password the user has input. And, the password show hide means showing and hiding the password while clicking on the icon for security purposes.

Have a quick look at the given image of our project Email and Password Validation. On the left side form, you can see three input blank input fields and one button. On another right-side form, you can see I have filled in some invalid data, that’s why there is some red-colored text with an error message.

Actually when we put inaccurate data on the input field or directly click on the button then those errors appear with an error message. On the password field, on the right side, we can see the eye icon. When we click on the icon, it helps us to show the characters that we filled. The confirm password field will check the created password and the confirmed password is matching or not.

Rather than theoretically, I would highly recommend you to watch the given video tutorial of our project [How to Validate Email & Password in HTML CSS JavaScript], in that video, I have shown a demo of this project and all the HTML CSS & JavaScript code that I have used to validate this email and password and of course password show and hide feature.

Email and Password Validation in HTML CSS & JavaScript

I have provided all the HTML CSS & JavaScript code that I have used to Validate Email, Password, and Show/Hide passwords. Before getting into the source code file, Let me explain the given video tutorial on this form validation briefly.

As you have seen in the video tutorial. At first, there was a signup form with three empty input fields and a button. When I clicked on the button without filling in the required date, a red error message appeared. After that when I started to enter my valid data the error message disappeared. Also, we could show and hide passwords by clicking on the eye icon. The email required proper valid email formation and the create password field needs the combination of numbers, special symbols, capital, and small letter. Basically, we need not put eight characters by mixing all those characters.

To make this sign-up form I have used HTML and CSS to validate the form and to show and hide the password,  I have used some JavaScript code.

I accept, now you can create this type of form and validate email and password using HTML CSS and JavaScript, and also show and hide passwords while clicking on the eye icon with changing icon. If you are feeling complicated, I have provided all the HTML CSS and JavaScript code below.

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Email & Password Validation [Source Code]

To get the following HTML CSS and JavaScript code for the Email & Password Validation, you need to create three files one is an HTML file and another is a CSS file and a JavaScript file. After creating these three files then you can copy-paste the given codes on your document. You can also download all source code files from the given download button.

 

<!DOCTYPE html>
<!-- Coding By CodingNepal - codingnepalweb.com -->
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Email and Password Validation</title>

    <!-- CSS -->
    <link rel="stylesheet" href="css/style.css" />

    <!-- Boxicons CSS -->
    <link
      href="https://unpkg.com/boxicons@2.1.2/css/boxicons.min.css"
      rel="stylesheet"
    />
  </head>
  <body>
    <div class="container">
      <header>Signup</header>
      <form action="https://www.codinglabweb.com/">
        <div class="field email-field">
          <div class="input-field">
            <input type="email" placeholder="Enter your email" class="email" />
          </div>
          <span class="error email-error">
            <i class="bx bx-error-circle error-icon"></i>
            <p class="error-text">Please enter a valid email</p>
          </span>
        </div>
        <div class="field create-password">
          <div class="input-field">
            <input
              type="password"
              placeholder="Create password"
              class="password"
            />
            <i class="bx bx-hide show-hide"></i>
          </div>
          <span class="error password-error">
            <i class="bx bx-error-circle error-icon"></i>
            <p class="error-text">
              Please enter atleast 8 charatcer with number, symbol, small and
              capital letter.
            </p>
          </span>
        </div>
        <div class="field confirm-password">
          <div class="input-field">
            <input
              type="password"
              placeholder="Confirm password"
              class="cPassword"
            />
            <i class="bx bx-hide show-hide"></i>
          </div>
          <span class="error cPassword-error">
            <i class="bx bx-error-circle error-icon"></i>
            <p class="error-text">Password don't match</p>
          </span>
        </div>
        <div class="input-field button">
          <input type="submit" value="Submit Now" />
        </div>
      </form>
    </div>

    <!-- JavaScript -->
   <script src="js/script.js"></script>
  </body>
</html>


/* Google Fonts - Poppins */
@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}
body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #4070f4;
}
.container {
  position: relative;
  max-width: 370px;
  width: 100%;
  padding: 25px;
  border-radius: 8px;
  background-color: #fff;
}
.container header {
  font-size: 22px;
  font-weight: 600;
  color: #333;
}
.container form {
  margin-top: 30px;
}
form .field {
  margin-bottom: 20px;
}
form .input-field {
  position: relative;
  height: 55px;
  width: 100%;
}
.input-field input {
  height: 100%;
  width: 100%;
  outline: none;
  border: none;
  border-radius: 8px;
  padding: 0 15px;
  border: 1px solid #d1d1d1;
}
.invalid input {
  border-color: #d93025;
}
.input-field .show-hide {
  position: absolute;
  right: 13px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: #919191;
  cursor: pointer;
  padding: 3px;
}
.field .error {
  display: flex;
  align-items: center;
  margin-top: 6px;
  color: #d93025;
  font-size: 13px;
  display: none;
}
.invalid .error {
  display: flex;
}
.error .error-icon {
  margin-right: 6px;
  font-size: 15px;
}
.create-password .error {
  align-items: flex-start;
}
.create-password .error-icon {
  margin-top: 4px;
}
.button {
  margin: 25px 0 6px;
}
.button input {
  color: #fff;
  font-size: 16px;
  font-weight: 400;
  background-color: #4070f4;
  cursor: pointer;
  transition: all 0.3s ease;
}
.button input:hover {
  background-color: #0e4bf1;
}

const form = document.querySelector("form"),
  emailField = form.querySelector(".email-field"),
  emailInput = emailField.querySelector(".email"),
  passField = form.querySelector(".create-password"),
  passInput = passField.querySelector(".password"),
  cPassField = form.querySelector(".confirm-password"),
  cPassInput = cPassField.querySelector(".cPassword");

// Email Validtion
function checkEmail() {
  const emaiPattern = /^[^ ]+@[^ ]+\.[a-z]{2,3}$/;
  if (!emailInput.value.match(emaiPattern)) {
    return emailField.classList.add("invalid"); //adding invalid class if email value do not mathced with email pattern
  }
  emailField.classList.remove("invalid"); //removing invalid class if email value matched with emaiPattern
}

// Hide and show password
const eyeIcons = document.querySelectorAll(".show-hide");

eyeIcons.forEach((eyeIcon) => {
  eyeIcon.addEventListener("click", () => {
    const pInput = eyeIcon.parentElement.querySelector("input"); //getting parent element of eye icon and selecting the password input
    if (pInput.type === "password") {
      eyeIcon.classList.replace("bx-hide", "bx-show");
      return (pInput.type = "text");
    }
    eyeIcon.classList.replace("bx-show", "bx-hide");
    pInput.type = "password";
  });
});

// Password Validation
function createPass() {
  const passPattern =
    /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$/;

  if (!passInput.value.match(passPattern)) {
    return passField.classList.add("invalid"); //adding invalid class if password input value do not match with passPattern
  }
  passField.classList.remove("invalid"); //removing invalid class if password input value matched with passPattern
}

// Confirm Password Validtion
function confirmPass() {
  if (passInput.value !== cPassInput.value || cPassInput.value === "") {
    return cPassField.classList.add("invalid");
  }
  cPassField.classList.remove("invalid");
}

// Calling Funtion on Form Sumbit
form.addEventListener("submit", (e) => {
  e.preventDefault(); //preventing form submitting
  checkEmail();
  createPass();
  confirmPass();

  //calling function on key up
  emailInput.addEventListener("keyup", checkEmail);
  passInput.addEventListener("keyup", createPass);
  cPassInput.addEventListener("keyup", confirmPass);

  if (
    !emailField.classList.contains("invalid") &&
    !passField.classList.contains("invalid") &&
    !cPassField.classList.contains("invalid")
  ) {
    location.href = form.getAttribute("action");
  }
});

If you face any difficulties while creating your Form Validation or your code is not working as expected, you can download the source code files for this Email Password Validation for free by clicking on the download button, and you can also view a live demo of this card slider by clicking on the view live button.

View Live Demo

 

]]> https://www.codingnepalweb.com/javascript-email-password-validation/feed/ 0 Login Form Validation in HTML CSS & JavaScript https://www.codingnepalweb.com/login-form-validation-in-html-javascript/ https://www.codingnepalweb.com/login-form-validation-in-html-javascript/#comments Fri, 04 Jun 2021 08:35:15 +0000 https://www.codingnepalweb.com/?p=1988 Login Form Validation in HTML with Shake Effect

Hey friends, today in this blog you’ll learn how to create a Login Form Validation with Shake Effect in HTML CSS & JavaScript. In the earlier blog, I’ve shared how to create Login & Registration Form using HTML & CSS and now it’s time to validate the login form using JavaScript.

Form Validation in HTML means to check that the user’s entered credential – Email, Username, Password is valid and correct or not. User will not get access to the restricted page until he/she entered a valid email and password. And, Shake Effect in this Login Form means when the user clicks on the login button without entering their email and password then the input boxes shake to inform the user that these fields can’t be blank.

In our Login Form Validation in HTML & JavaScript, as you can see on the image preview, there is a login form that holds login text, two input fields, a login button, etc. at first those login errors are not shown but when the user clicks on the login button without entering their email & password then there is appear these errors with shake effect.

Once the user starts entering their credentials in the input fields then these errors will automatically hide. If you are feeling difficulties with what I’m saying then you can watch a video tutorial of this Login Form Validation in HTML with Shake Effect.

Video Tutorial of Form Validation in HTML & JavaScript

 
In the video, you’ve clearly seen how this login form looks like and how it show an error when the user tries to log in without entering an email and password or without entering a valid email address. This login form is created only for design purposes so when you entered a valid email & password and click on the login button then these details won’t send or submit anywhere.

If you want to send these details anywhere and want to receive them using PHP then you’ve to put that PHP file URL inside the action attribute of the form tag. I’ve already shared a blog on how to create Login & Registration Form with Email Verification using PHP. If you want to make this form workable and dynamic then don’t forget to read the mentioned blog.

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Form Validation in HTML & JavaScript [Source Codes]

To create this program [Form Validation in HTML & JavaScript]. First, you need to create three Files: HTML, CSS & JavaScript File. After creating these files just paste the following codes into your file. You can also download the source code files of this Form Validation in HTML from the given download button.

First, create an HTML file with the name of index.html and paste the given codes into your HTML file. Remember, you’ve to create a file with .html extension.

<!DOCTYPE html>
<!-- Coding By CodingNepal - youtube.com/codingnepal -->
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Login Form validation in HTML & CSS | CodingNepal</title>
  <link rel="stylesheet" href="style.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css"/>
</head>
<body>
  <div class="wrapper">
    <header>Login Form</header>
    <form action="#">
      <div class="field email">
        <div class="input-area">
          <input type="text" placeholder="Email Address">
          <i class="icon fas fa-envelope"></i>
          <i class="error error-icon fas fa-exclamation-circle"></i>
        </div>
        <div class="error error-txt">Email can't be blank</div>
      </div>
      <div class="field password">
        <div class="input-area">
          <input type="password" placeholder="Password">
          <i class="icon fas fa-lock"></i>
          <i class="error error-icon fas fa-exclamation-circle"></i>
        </div>
        <div class="error error-txt">Password can't be blank</div>
      </div>
      <div class="pass-txt"><a href="#">Forgot password?</a></div>
      <input type="submit" value="Login">
    </form>
    <div class="sign-txt">Not yet member? <a href="#">Signup now</a></div>
  </div>

  <script src="script.js"></script>

</body>
</html>

Second, create a CSS file with the name of style.css and paste the given codes in your CSS file. Remember, you’ve to create a file with .css extension.

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600&display=swap');
*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}
body{
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #5372F0;
}
::selection{
  color: #fff;
  background: #5372F0;
}
.wrapper{
  width: 380px;
  padding: 40px 30px 50px 30px;
  background: #fff;
  border-radius: 5px;
  text-align: center;
  box-shadow: 10px 10px 15px rgba(0,0,0,0.1);
}
.wrapper header{
  font-size: 35px;
  font-weight: 600;
}
.wrapper form{
  margin: 40px 0;
}
form .field{
  width: 100%;
  margin-bottom: 20px;
}
form .field.shake{
  animation: shake 0.3s ease-in-out;
}
@keyframes shake {
  0%, 100%{
    margin-left: 0px;
  }
  20%, 80%{
    margin-left: -12px;
  }
  40%, 60%{
    margin-left: 12px;
  }
}
form .field .input-area{
  height: 50px;
  width: 100%;
  position: relative;
}
form input{
  width: 100%;
  height: 100%;
  outline: none;
  padding: 0 45px;
  font-size: 18px;
  background: none;
  caret-color: #5372F0;
  border-radius: 5px;
  border: 1px solid #bfbfbf;
  border-bottom-width: 2px;
  transition: all 0.2s ease;
}
form .field input:focus,
form .field.valid input{
  border-color: #5372F0;
}
form .field.shake input,
form .field.error input{
  border-color: #dc3545;
}
.field .input-area i{
  position: absolute;
  top: 50%;
  font-size: 18px;
  pointer-events: none;
  transform: translateY(-50%);
}
.input-area .icon{
  left: 15px;
  color: #bfbfbf;
  transition: color 0.2s ease;
}
.input-area .error-icon{
  right: 15px;
  color: #dc3545;
}
form input:focus ~ .icon,
form .field.valid .icon{
  color: #5372F0;
}
form .field.shake input:focus ~ .icon,
form .field.error input:focus ~ .icon{
  color: #bfbfbf;
}
form input::placeholder{
  color: #bfbfbf;
  font-size: 17px;
}
form .field .error-txt{
  color: #dc3545;
  text-align: left;
  margin-top: 5px;
}
form .field .error{
  display: none;
}
form .field.shake .error,
form .field.error .error{
  display: block;
}
form .pass-txt{
  text-align: left;
  margin-top: -10px;
}
.wrapper a{
  color: #5372F0;
  text-decoration: none;
}
.wrapper a:hover{
  text-decoration: underline;
}
form input[type="submit"]{
  height: 50px;
  margin-top: 30px;
  color: #fff;
  padding: 0;
  border: none;
  background: #5372F0;
  cursor: pointer;
  border-bottom: 2px solid rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}
form input[type="submit"]:hover{
  background: #2c52ed;
}

Last, create a JavaScript file with the name of script.js and paste the given codes in your JavaScript file. Remember, you’ve to create a file with .js extension.

const form = document.querySelector("form");
eField = form.querySelector(".email"),
eInput = eField.querySelector("input"),
pField = form.querySelector(".password"),
pInput = pField.querySelector("input");

form.onsubmit = (e)=>{
  e.preventDefault(); //preventing from form submitting
  //if email and password is blank then add shake class in it else call specified function
  (eInput.value == "") ? eField.classList.add("shake", "error") : checkEmail();
  (pInput.value == "") ? pField.classList.add("shake", "error") : checkPass();

  setTimeout(()=>{ //remove shake class after 500ms
    eField.classList.remove("shake");
    pField.classList.remove("shake");
  }, 500);

  eInput.onkeyup = ()=>{checkEmail();} //calling checkEmail function on email input keyup
  pInput.onkeyup = ()=>{checkPass();} //calling checkPassword function on pass input keyup

  function checkEmail(){ //checkEmail function
    let pattern = /^[^ ]+@[^ ]+\.[a-z]{2,3}$/; //pattern for validate email
    if(!eInput.value.match(pattern)){ //if pattern not matched then add error and remove valid class
      eField.classList.add("error");
      eField.classList.remove("valid");
      let errorTxt = eField.querySelector(".error-txt");
      //if email value is not empty then show please enter valid email else show Email can't be blank
      (eInput.value != "") ? errorTxt.innerText = "Enter a valid email address" : errorTxt.innerText = "Email can't be blank";
    }else{ //if pattern matched then remove error and add valid class
      eField.classList.remove("error");
      eField.classList.add("valid");
    }
  }

  function checkPass(){ //checkPass function
    if(pInput.value == ""){ //if pass is empty then add error and remove valid class
      pField.classList.add("error");
      pField.classList.remove("valid");
    }else{ //if pass is empty then remove error and add valid class
      pField.classList.remove("error");
      pField.classList.add("valid");
    }
  }

  //if eField and pField doesn't contains error class that mean user filled details properly
  if(!eField.classList.contains("error") && !pField.classList.contains("error")){
    window.location.href = form.getAttribute("action"); //redirecting user to the specified url which is inside action attribute of form tag
  }
}

That’s all, now you’ve successfully created a Login Form Validation in HTML CSS & JavaScript. If your code doesn’t work or you’ve faced any error/problem then please download the source code files from the given download button. It’s free and a .zip file will be downloaded then you’ve to extract it.

 

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