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0x10FFFF) throw new Error('非法码点: ' + parts[i]); out += String.fromCharCode(n); } return out; } form.addEventListener('submit', function(e) { e.preventDefault(); btnMain.disabled = true; btnMain.textContent = '处理中…'; errorMsg.classList.remove('show'); resultArea.classList.remove('show'); var mode = document.getElementById('mode').value; var text = document.getElementById('text').value; var delim = document.getElementById('delim').value; var hex = document.getElementById('hex').value === '1'; if (!text) { showError('请输入内容'); btnMain.disabled = false; btnMain.textContent = '转换'; return; } try { var result; if (mode === 'str2ascii') { result = toCodes(text, delim, hex); resultMeta.textContent = '字符串 → ' + (hex ? '十六进制' : '十进制') + ' 码点，共 ' + text.length + ' 字符'; } else { result = fromCodes(text); resultMeta.textContent = '码点 → 字符串，共 ' + result.length + ' 字符'; } resultContent.textContent = result; resultArea.classList.add('show'); } catch(err) { showError('错误：' + err.message); } btnMain.disabled = false; btnMain.textContent = '转换'; }); btnClear.addEventListener('click', function() { document.getElementById('text').value = ''; document.getElementById('mode').value = 'str2ascii'; document.getElementById('delim').value = ' '; document.getElementById('hex').value = '0'; resultArea.classList.remove('show'); errorMsg.classList.remove('show'); }); })();