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Câu 19:

Thẻ </texterea> dùng để làm gì?</p></h1><div class="flex flex-wrap gap-2 mb-6"><button class="inline-flex items-center justify-center rounded-md font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50 bg-primary text-primary-foreground hover:bg-primary/90 h-9 px-4 text-sm gap-2"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-eye w-4 h-4" aria-hidden="true"><path d="M2.062 12.348a1 1 0 0 1 0-.696 10.75 10.75 0 0 1 19.876 0 1 1 0 0 1 0 .696 10.75 10.75 0 0 1-19.876 0"></path><circle cx="12" cy="12" r="3"></circle></svg>Xem đáp án</button><button class="inline-flex items-center justify-center rounded-md font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50 border border-input bg-background hover:bg-accent h-9 px-4 text-sm gap-2">Xem full bài test</button></div><div class="bg-white dark:bg-slate-800 rounded-lg border shadow-sm border-slate-200 dark:border-gray-700"><div class="px-4 py-3 border-b border-slate-200 dark:border-gray-700"><div class="flex items-start justify-between gap-4"><div class="flex items-start gap-3 flex-1"><div class="flex items-center gap-2"><span class="text-xl font-bold text-slate-400 dark:text-gray-400">1</span></div><div class=" flex-1 min-w-0 text-slate-800 dark:text-gray-100 leading-relaxed font-medium text-lg prose dark:prose-invert max-w-none prose-p:my-1 prose-ul:my-1 prose-ol:my-1 prose-li:my-0 prose-strong:text-inherit prose-em:text-inherit [&_.katex-display]:my-2 [&_.katex]:text-inherit [&>p:first-child]:mt-0 [&>p:last-child]:mb-0 "><p><strong> Câu 19:</strong></p> <p>Thẻ <textarea ></texterea> dùng để làm gì?</p></div></div><div class="flex items-center gap-2"></div></div></div><div class="p-4"><div class="space-y-2"><button class=" w-full text-left p-3 rounded-lg border transition-all text-sm border-slate-200 dark:border-slate-600 hover:border-blue-300 hover:bg-slate-50 dark:hover:bg-slate-700 "><div class="flex items-start gap-3"><div class=" flex-shrink-0 w-7 h-7 text-sm rounded-full border flex items-center justify-center font-semibold border-slate-300 text-slate-500 ">a</div><span class="text-slate-800 dark:text-gray-100 flex-1 leading-relaxed prose prose-sm dark:prose-invert max-w-none">A. Tạo một ô text để nhập dữ liệu 1 dòng</span></div></button><button class=" w-full text-left p-3 rounded-lg border transition-all text-sm border-slate-200 dark:border-slate-600 hover:border-blue-300 hover:bg-slate-50 dark:hover:bg-slate-700 "><div class="flex items-start gap-3"><div class=" flex-shrink-0 w-7 h-7 text-sm rounded-full border flex items-center justify-center font-semibold border-slate-300 text-slate-500 ">b</div><span class="text-slate-800 dark:text-gray-100 flex-1 leading-relaxed prose prose-sm dark:prose-invert max-w-none">B. Tạo một ô password</span></div></button><button class=" w-full text-left p-3 rounded-lg border transition-all text-sm border-slate-200 dark:border-slate-600 hover:border-blue-300 hover:bg-slate-50 dark:hover:bg-slate-700 "><div class="flex items-start gap-3"><div class=" flex-shrink-0 w-7 h-7 text-sm rounded-full border flex items-center justify-center font-semibold border-slate-300 text-slate-500 ">c</div><span class="text-slate-800 dark:text-gray-100 flex-1 leading-relaxed prose prose-sm dark:prose-invert max-w-none">C. Tạo một textbox cho phép nhập liệu nhiều dòng</span></div></button><button class=" w-full text-left p-3 rounded-lg border transition-all text-sm border-slate-200 dark:border-slate-600 hover:border-blue-300 hover:bg-slate-50 dark:hover:bg-slate-700 "><div class="flex items-start gap-3"><div class=" flex-shrink-0 w-7 h-7 text-sm rounded-full border flex items-center justify-center font-semibold border-slate-300 text-slate-500 ">d</div><span class="text-slate-800 dark:text-gray-100 flex-1 leading-relaxed prose prose-sm dark:prose-invert max-w-none">D. Tất cả các ý trên</span></div></button></div></div></div><div class="mt-8 bg-white dark:bg-slate-800 rounded-lg border border-slate-200 dark:border-slate-600 p-6"><h3 class="font-semibold text-slate-800 dark:text-gray-100 mb-4">Thông tin câu hỏi</h3><div class="grid grid-cols-1 md:grid-cols-2 gap-4 text-sm"><div class="flex items-center gap-2"><span class="text-slate-500 dark:text-slate-400">Format:</span><div class="inline-flex items-center px-2 py-0.5 rounded-md text-xs font-medium border border-slate-200 dark:border-slate-600 text-slate-600 dark:text-slate-400 bg-transparent">Trắc nghiệm 1 đáp án</div></div><div class="flex items-center gap-2"><span class="text-slate-500 dark:text-slate-400">Độ khó:</span><div class="inline-flex items-center px-2 py-0.5 rounded-md text-xs font-medium bg-yellow-100 text-yellow-700 dark:bg-yellow-900/30 dark:text-yellow-400">Trung bình</div></div><div class="flex items-center gap-2"><span class="text-slate-500 dark:text-slate-400">Môn:</span><span class="text-slate-800 dark:text-gray-100">lap-trinh-java</span></div><div class="flex items-center gap-2"><span class="text-slate-500 dark:text-slate-400">Cấp độ:</span><span class="text-slate-800 dark:text-gray-100">dai-hoc</span></div><div class="flex items-center gap-2"><span class="text-slate-500 dark:text-slate-400">Mã đề:</span><span class="text-slate-800 dark:text-gray-100">dai-hoc-lap-trinh-java</span></div><div class="flex items-center gap-2"><span class="text-slate-500 dark:text-slate-400">Phần:</span><span class="text-slate-800 dark:text-gray-100">lập_trình_java</span></div><div class="flex items-center gap-2"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-eye w-4 h-4 text-slate-400" aria-hidden="true"><path d="M2.062 12.348a1 1 0 0 1 0-.696 10.75 10.75 0 0 1 19.876 0 1 1 0 0 1 0 .696 10.75 10.75 0 0 1-19.876 0"></path><circle cx="12" cy="12" r="3"></circle></svg><span class="text-slate-600 dark:text-slate-400"> lượt làm</span></div><div class="flex items-center gap-2"><span class="text-slate-500 dark:text-slate-400">Năm:</span><span class="text-slate-800 dark:text-gray-100">2026</span></div></div><div class="mt-4 pt-4 border-t border-slate-200 dark:border-slate-700"><div class="flex items-center gap-2 mb-2"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-tag w-4 h-4 text-slate-400" aria-hidden="true"><path d="M12.586 2.586A2 2 0 0 0 11.172 2H4a2 2 0 0 0-2 2v7.172a2 2 0 0 0 .586 1.414l8.704 8.704a2.426 2.426 0 0 0 3.42 0l6.58-6.58a2.426 2.426 0 0 0 0-3.42z"></path><circle cx="7.5" cy="7.5" r=".5" fill="currentColor"></circle></svg><span class="text-sm text-slate-600 dark:text-slate-400">Tags:</span></div><div class="flex flex-wrap gap-2"><span class="px-2 py-1 bg-slate-100 dark:bg-slate-700 text-slate-600 dark:text-slate-300 text-xs rounded">#lập trình java</span></div></div></div><div class="mt-6 flex justify-between"><button class="inline-flex items-center justify-center gap-1.5 rounded-md font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50 border border-input bg-background hover:bg-accent h-9 px-4 text-sm" disabled="">← Câu trước</button><button class="inline-flex items-center justify-center gap-1.5 rounded-md font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50 border border-input bg-background hover:bg-accent h-9 px-4 text-sm" disabled="">Câu tiếp →</button></div></div></div></main></div><div class="fixed top-20 right-4 z-50 flex flex-col gap-2 max-w-md"></div><script 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