Sure, here's an example of how to do it in JavaScript:

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const passwordInput = document.querySelector('input[type="password"]');
const form = document.querySelector('form');

form.addEventListener('submit', function(event) {
  event.preventDefault(); // prevent form submission

  alert(`The password input value is: ${passwordInput.value}`);
});

In this code, we're first accessing the password input element and the form element using document.querySelector(). Then we're adding an event listener to the form's submit event using addEventListener(). Inside the event listener, we're preventing the default form submission behavior using event.preventDefault(). Finally, we're displaying an alert box with the value of the password input using template literals.

I hope this helps! Let me know if you have any other questions.

To do this in JavaScript, you can give an ID to the password input element, and then use the document.getElementById() method to get the value of the input. You can then use the alert() method to show the password input value.

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<form>
  <label for="password">Password:</label>
  <input type="password" id="password" name="password"><br><br>
  <input type="submit" value="Submit">
</form>

<script>
  const form = document.querySelector('form');

  // listen for form submission event
  form.addEventListener('submit', function(event) {
    event.preventDefault(); // prevent default form submission
    const password = document.getElementById('password').value; // get password value
    alert(`The password is ${password}`); // show password value in alert
  });
</script>

Here's an example of the code in action: https://codepen.io/shecodes/pen/OJMQoYy

If you want to take a string input from the user and confirm if it is 10 characters long, you could use the following JavaScript code:

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const password = prompt('Please enter your password');
if (password.length === 10){
  console.log('Valid! Your password is 10 characters')
} else {
  console.log('Invalid! Your password is not 10 characters')
}

You can use the alert() function to display a message in the form. For example, you can use the following JavaScript code to alert the value of the password input when the form is submitted:

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    document.getElementById("myForm").addEventListener("submit", function(event){
      alert("Password: " + document.getElementById("password").value);
      event.preventDefault();
    });

To add a password confirmation field in an HTML form using only HTML, you can create an additional <input> element and set the type attribute to password, the name attribute to confirm_password and the required attribute to true like this:

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<input type="password" name="confirm_password" required>

This will make the user enter the password field twice, once in the initial <input type="password"> and again in the new <input type="password">. The form won't submit until both fields are identical, verifying the validity of the password.

You can add a password confirmation field in an HTML form by using a JavaScript onSubmit() function to check if the two form field values are equal. See an example below:

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<form onsubmit="return isPasswordEqual();">
    <label>Password: </label>
    <input type="password" id="password" name="password">
    <label>Confirm Password: </label>
    <input type="password" id="confirm_password" name="confirm_password">
    <input type="submit" value="Submit">
</form>
<script>
    function isPasswordEqual(){
        var password = document.getElementById("password").value;
        var confirmPassword = document.getElementById("confirm_password").value;

        if(password == confirmPassword){
            return true;
        }
        else{
            alert("Password don't match!");
            return false;
        }
    }
</script>

Single sign-on (SSO) is a property of access control of multiple related, but independent software systems. With SSO, a user logs in once and gains access to all systems without being prompted to log in again at each of them. Using SSO, users and administrators can manage access to multiple systems from a single point of authentication. SSO is used mainly by organizations to provide access to their websites and applications for their employees. It is also used to provide access to websites for users with multiple accounts. SSO does not only simplify the user sign-in process, but also provides better security for user accounts since only one set of credentials needs to be protected. Additionally, because only one sign-in is required, SSO eliminates the need for users to remember individual usernames and passwords for each account.

The following JavaScript code will alert the value of the password input when a form is submitted:

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document.querySelector('form').onsubmit = () => {
  alert(document.querySelector('input[type="password"]').value);
}

More information about forms can be found in this MDN article.