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'; lastIndex = m.index + m.match.length; } html += escapeHtml(inputVal.substring(lastIndex)); resultContent.innerHTML = html; var groupNote = matchInfos[0].groups.length > 0 ? '，含 ' + matchInfos[0].groups.length + ' 个分组' : ''; resultMeta.textContent = '匹配 ' + matches.length + ' 个' + groupNote; } resultArea.classList.add('show'); } catch(err) { showError('正则错误：' + err.message); } btnMain.disabled = false; btnMain.textContent = '测试'; }); function escapeHtml(str) { return str .replace(/&/g, '&') .replace(//g, '>') .replace(/"/g, '"'); } btnClear.addEventListener('click', function() { document.getElementById('pattern').value = ''; document.getElementById('input').value = ''; document.getElementById('flags-g').checked = true; document.getElementById('flags-i').checked = false; resultArea.classList.remove('show'); errorMsg.classList.remove('show'); }); })();