JSFiddle - React, Tailwind, and code Playground

HTML

<form id="up_cover">
    <input type="file" /> <a href="#" class="atualizar" style="display: none;">
        Atualizar
      </a>

    <input type="hidden" name="update_cover_user" />
</form>

JavaScript

$('#up_cover input[type=file]').on('change', function () {
    $(this).next('a.atualizar').toggle(this.value);
    readURL(this);
});

$('#up_cover a.atualizar').on('click', function (e) {
    e.preventDefault();
    $(this).closest('form').submit();
});