Recovers input value and compare with jquery value

Question

I have this code that retrieves the value entered in the input and compares it with a value x, in this case 25.00. The problem is that when I change the field inside the form it shows the error saying that the entered value is less than 25, but if the person does not correct and submit the form he sends anyway, i need that if the entered value is less than 25 it shows the error message and when the user submits the form it returns to show the error not letting the form follow and when the user enters the correct value, ie 25 or higher, the error message disappears.

<div class="donate_amount_field m-0">
     <input type="text" name="amount" class="form-control" value="" required>
 </div>                                
 <div class="alert" id="error_amount" style="display: none;">valor menor que 25</div>


 $('input[name=amount]').blur(function() {

    if ( $(this).val() < "25,00" )

       showError_amount();

  });

  function showError_amount() {

     $("#error_amount").show();

  }

Answer 1

$('input[name=amount]').focusout(function() {
    var valorDigitado = parseFloat($(this).val());
    if (valorDigitado < 25) {
       $('input[name="amount"]').val(25.00);
       showError_amount();
       } else {
        $("#error_amount").hide();
       }
       
  });

  function showError_amount() {
     $("#error_amount").show();
  }

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<form>
<div class="donate_amount_field m-0">
     <input type="text" name="amount" class="form-control" value="" placeholder="Valor Maior que 25.00" required>
 </div>                                
 <div class="alert alert-danger mt-3" role="alert" id="error_amount" style="display: none;"><strong>Atenção!</strong> Valor menor que 25!</div>
 </form>

See if this helps! As a quick solution, I simply assign "automatically" the value 25 within the input, if the value entered by the user is less than 25, understood?

I hope I’ve helped you! Any doubt is just talk ;)