Wiadomość z licznikiem znaków

<main class="letter"><header><p>Krótka wiadomość</p><h1>Szkic<br>wiadomości.</h1><p>Limit wiadomości:<br>240 znaków.</p><div class="stamp" aria-hidden="true">A</div></header><form id="letter-form"><div class="field"><label for="email">Przykładowy adres e-mail</label><input id="email" type="email" value="anna@example.test" required maxlength="254" autocomplete="off"></div><label for="message">Wiadomość</label><textarea id="message" rows="4" maxlength="240" minlength="10" required aria-describedby="counter" placeholder="Napisz co najmniej 10 znaków."></textarea><div class="counter-row"><progress id="progress" max="240" value="0" aria-label="Wykorzystany limit znaków"></progress><output id="counter" for="message">0 / 240</output></div><div class="row"><button type="button" data-demo-submit>Zapisz szkic</button><button id="clear-message" type="button" class="secondary">Wyczyść</button></div><p id="status" class="status" role="status"></p><p class="note">Przykładowy formularz wiadomości.</p></form></main>

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(()=>{const q=s=>document.querySelector(s);const all=s=>[...document.querySelectorAll(s)];const update=()=>{const length=q('#message').value.length;q('#counter').textContent=length+' / 240';q('#progress').value=length;q('#status').textContent=''};q('#message').oninput=update;q('#letter-form').onsubmit=e=>{e.preventDefault();if(!q('#letter-form').reportValidity())return;q('#status').textContent=`Szkic zapisany: ${q('#message').value.length} znaków. Nic nie zostało wysłane.`};q('#clear-message').onclick=()=>{q('#message').value='';update();q('#message').focus()};update();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();}})});})();