Even after being removed, the input field in Firefox stubbornly maintains a red border

I have a project in progress that requires users to input data on a modal view and save it.

The validation process highlights any errors with the following CSS snippet:

.erroreEvidenziato {
    border: 1px solid red;
}

Here is the HTML code for the modal view:

<div id=nuovaAssociazione class="modal">
  <div class="modal-content small smallModalAgency">
    <div class="title">
      <span class="info">
          <em>* </em> {{#i18n}}mandatoryField{{/i18n}}
      </span>
      <h3 id="titoloModale"></h3>
      <input type="hidden" id="idAgency" value="">
    </div>
    [...]
  </div>
</div>

This is how the modal looks like: https://i.stack.imgur.com/OYQ5R.png

The saveAssociazione() method, responsible for saving the record, is structured as follows:

function saveAssociazione() {
    $(".erroreModaleDiv").hide();
    [...]
}

This is how the modal appears if some fields aren't filled: https://i.stack.imgur.com/F91ki.png

On closing the modal, all erroreEvidenziato classes are removed via the closeModal() function:

function closeModal(modal) {
    $(".erroreModaleDiv").hide();
    [...]
}

However, there seems to be an issue when using Firefox (version 69). After saving a record with unfilled fields, reopening the modal displays remnants of the erroreEvidenziato class. This occurs specifically on the jQuery datepickers initialized as follows:

$("#validity_a").datepicker({
    showWeek: true,
    [...]
});

$("#validity_da").datepicker({
    showWeek: true,
    [...]
});

What could be causing this unexpected behavior?

Answer №1

The `required` attribute can prompt browsers to validate the fields and apply their own CSS styles to them. If you are implementing custom validation, it may be necessary to eliminate this attribute to prevent the browser from performing its own validation.

For more details on HTML5 form validation click here

Alternatively, you could potentially override the style using a method similar to the following example:

input:invalid {
   border ... 
}

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