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validate_username.js
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validate_username.js
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// validate_username.js
// Function to validate the username asynchronously
function validateUsername(username) {
// Make an AJAX request to a PHP file that checks if the username exists
// Replace 'validate_username.php' with the actual PHP file that handles username validation
$.ajax({
url: 'validate_username.php',
method: 'POST',
data: { username: username },
success: function(response) {
if (response === 'valid') {
// Username is valid, display a green tick and enable the password field
$('#username-validation').html('<i class="fas fa-check-circle"></i>');
$('#password').prop('disabled', false);
$('#submit-btn').prop('disabled', false);
} else {
// Username is not valid, display an error message and disable the password field and submit button
$('#username-validation').html('User not found');
$('#password').prop('disabled', true);
$('#submit-btn').prop('disabled', true);
}
}
});
}
// Event listener for the username input field
$(document).ready(function() {
$('#username').on('input', function() {
var username = $(this).val();
validateUsername(username);
});
});