Formularz z polami warunkowymi

<main class="invoice"><header><h1>Komu wystawić<br>potwierdzenie?</h1><p>Przykładowy formularz.</p><div class="receipt" aria-hidden="true"><span>Potwierdzenie</span><i></i><i></i><i></i><strong>120,00 zł</strong></div></header><form id="invoice-form"><fieldset><legend>Rodzaj odbiorcy</legend><div class="row"><label><input type="radio" name="kind" value="person" checked> Osoba prywatna</label><label><input type="radio" name="kind" value="company"> Firma</label></div></fieldset><div id="person-fields" class="field"><label for="person-name">Imię i nazwisko</label><input id="person-name" required maxlength="60" value="Anna Przykładowa"></div><div id="company-fields" hidden><div class="field"><label for="company-name">Nazwa firmy</label><input id="company-name" required disabled maxlength="80" placeholder="Przykładowa pracownia"></div><div class="field"><label for="tax-id">NIP (10 cyfr)</label><input id="tax-id" required disabled inputmode="numeric" pattern="[0-9]{10}" maxlength="10" placeholder="1234567890"></div></div><button type="button" data-demo-submit>Pokaż odbiorcę</button><p id="status" class="status" role="status"></p><p class="note">Przykładowe dane odbiorcy.</p></form></main>

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(()=>{const q=s=>document.querySelector(s);const all=s=>[...document.querySelectorAll(s)];const toggle=()=>{const company=q('input[name=kind]:checked').value==='company';q('#person-fields').hidden=company;q('#company-fields').hidden=!company;q('#person-name').disabled=company;q('#company-name').disabled=!company;q('#tax-id').disabled=!company;q('#status').textContent=''};$('input[name=kind]').on('change',toggle);$('#invoice-form').on('submit',e=>{e.preventDefault();if(!q('#invoice-form').reportValidity())return;const company=q('input[name=kind]:checked').value==='company';q('#status').textContent=company?`Odbiorca: ${q('#company-name').value}; NIP: ${q('#tax-id').value}.`:`Odbiorca: ${q('#person-name').value}.`});toggle();all('form').forEach(form=>{const submit=form.querySelector('[data-demo-submit]');if(!submit)return;submit.addEventListener('click',()=>form.dispatchEvent(new Event('submit',{cancelable:true})));form.addEventListener('keydown',event=>{if(event.key==='Enter'&&!event.defaultPrevented&&event.target.matches('input:not([type=radio]):not([type=checkbox])')){event.preventDefault();submit.click();}})});})();