'; resultContent.innerHTML = html; resultMeta.textContent = '通过基准单位 节 换算: ' + val + ' ' + from + ' = ' + kn.toFixed(4) + ' kn = ' + result + ' ' + to; resultArea.classList.add('show'); }); document.getElementById('btn-clear').addEventListener('click', function() { document.getElementById('val').value = 10; fromSel.value = 'kn'; toSel.value = 'kmh'; clearError(); clearResult(); }); })();