当前位置：首页 > 文章列表 > 文章 > 前端 > HTML5多行文本框怎么添加

HTML5多行文本框怎么添加

2026-03-05 13:28:56 0浏览收藏

本文深入解析了HTML5中实现多行文本输入的正确方式——必须使用``元素而非试图改造`<input>`，澄清了常见误区（如给`<input>`加`rows/cols`无效），详解了`<textarea>`的原生特性（换行、滚动、响应输入）、DOM操作要点（必须用`.value`读写，不可依赖`getAttribute('value')`）、尺寸控制策略（优先CSS而非`rows/cols`）、移动端聚焦时软键盘遮挡的实用修复方案，以及表单提交时换行符处理等易被忽视的关键细节，帮助开发者避开坑点，写出健壮可靠的多行文本交互功能。

HTML5如何加入多行文本框_HTML5加入多行框步骤【入门】

用 </code> 替代 <code><input type="text"></code></h3> <p>HTML5 里没有叫“多行文本框”的新标签，实现多行输入靠的是 <code><textarea></code> 元素——它原生支持换行、回车和滚动，且无需额外 JS 就能响应用户输入。</p> <p>常见误区是试图给 <code><input></code> 加 <code>rows</code> 或 <code>cols</code> 属性，这完全无效：<code><input></code> 永远单行，加了也忽略。</p> <ul><li><code><textarea></code> 是双标签，必须有闭合（<code>），内容写在开始与结束标签之间
默认无宽度高度，需用 CSS 或原生属性控制尺寸

不支持 `value` 属性设置初始值，应把文本放在标签体内

`rows` 和 `cols` 是提示值，不是绝对限制

这两个属性只影响初始显示的行数和字符宽度，浏览器会据此估算高度/宽度，但用户仍可拖拽缩放（除非用 CSS 禁用），也能输入远超 cols 的长行内容。

更可靠的做法是用 CSS 控制：

请输入反馈意见...

resize: vertical 允许用户仅上下拉伸，避免布局错乱
max-width 防止在宽屏下过宽
height 比 rows 更精确控制视觉高度

如何获取和设置内容？别用 `value` 属性读取

JavaScript 中操作 </code> 内容，必须用 <code>.value</code> 属性读写，不能依赖 <code>getAttribute('value')</code> —— 因为它的初始值不在属性里，而在标签体中。</p> <p>例如：</p> <pre class="brush:php;toolbar:false">const ta = document.querySelector('textarea'); console.log(ta.value); // ✅ 正确：获取当前全部文本（含换行符 \n） console.log(ta.getAttribute('value')); // ❌ 返回 null，该属性不存在</pre> <ul><li>提交表单时，<code><textarea></code> 的值会自动作为字段发送，name 属性不可少</li> <li>若需预填充内容，直接写在标签内：<code><textarea name="msg">默认文字

动态设值用 ta.value = '新内容'，不是 ta.innerHTML

移动端软键盘弹出后遮挡 </code> 怎么办？</h3> <p>这是实际开发中最常被忽略的问题：iOS 和部分安卓 WebView 中，聚焦 <code><textarea></code> 后软键盘顶起页面，但元素本身不会自动滚动到可视区。</p> <p>简单修复方式（无需框架）：</p> <pre class="brush:php;toolbar:false">document.querySelector('textarea').addEventListener('focus', function() { setTimeout(() => this.scrollIntoView({ behavior: 'smooth', block: 'nearest' }), 100); });</pre> <ul><li>加 <code>setTimeout</code> 是因为聚焦瞬间 DOM 可能还没完成重排</li> <li><code>block: 'nearest'</code> 避免过度滚动，比 <code>'center'</code> 更稳妥</li> <li>如果页面已有滚动容器（如 <code>overflow-y: auto</code> 的 div），需对那个容器调用 <code>scrollIntoView</code></li> </ul> 真正麻烦的不是怎么加多行框，而是忘了它在表单提交时的行为和普通 <code><input></code> 不同：换行符是 <code>\n</code> 而非 <code><br></code>，服务端接收后要按需处理；还有 autofocus、placeholder、maxlength 等属性虽可用，但兼容性细节容易漏掉。<p>本篇关于《HTML5多行文本框怎么添加》的介绍就到此结束啦，但是学无止境，想要了解学习更多关于文章的相关知识，请关注golang学习网公众号！</p> </div> <div class="labsList"> <a href="javascript:;" title="html5如何创建表单">html5如何创建表单</a> </div> <div class="cateBox"> <div class="cateItem"> <a href="/article/518861.html" title="DeepSeekOCR支持哪些图像格式？" class="img_box"> <img src="/uploads/20260305/177268845969a9144b0b569.jpg" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="DeepSeekOCR支持哪些图像格式？">DeepSeekOCR支持哪些图像格式？ </a> <dl> <dt class="lineOverflow"><a href="/article/518861.html" title="DeepSeekOCR支持哪些图像格式？" class="aBlack">上一篇<i></i></a></dt> <dd class="lineTwoOverflow">DeepSeekOCR支持哪些图像格式？</dd> </dl> </div> <div class="cateItem"> <a href="/article/518863.html" title="上下文传值与参数传递对比解析" class="img_box"> <img src="/uploads/20260305/177268858469a914c8a4d3c.jpg" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="上下文传值与参数传递对比解析"> </a> <dl> <dt class="lineOverflow"><a href="/article/518863.html" class="aBlack" title="上下文传值与参数传递对比解析">下一篇<i></i></a></dt> <dd class="lineTwoOverflow">上下文传值与参数传递对比解析</dd> </dl> </div> </div> </div> </div> <div class="leftContBox pt0"> <div class="pdl20"> <div class="contTit"> <a href="/articlelist.html" class="more" title="查看更多">查看更多<i class="iconfont"></i></a> <div class="tit">最新文章</div> </div> </div> <ul class="newArticleList"> <li> <div class="contBox"> <a href="/article/620045.html" class="img_box" title="前端表单重复提交防护工作流：从按钮状态到请求取消和幂等键"> <img src="/uploads/20260622/1782110788-frontend-idempotent-key-flow.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端表单重复提交防护工作流：从按钮状态到请求取消和幂等键"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 1天前 | <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/39982_new_0_1.html" class="aLightGray" title="接口联调">接口联调</a> · <a href="/articletag/39989_new_0_1.html" class="aLightGray" title="表单交互">表单交互</a> · <a href="/articletag/39990_new_0_1.html" class="aLightGray" title="重复提交">重复提交</a> · <a href="/articletag/39991_new_0_1.html" class="aLightGray" title="用户体验">用户体验</a> · <a href="javascript:;" class="aLightGray" title="前端">前端</a> <a href="javascript:;" class="aLightGray" title="表单提交">表单提交</a> <a href="javascript:;" class="aLightGray" title="重复请求">重复请求</a> <a href="javascript:;" class="aLightGray" title="AbortController">AbortController</a> <a href="javascript:;" class="aLightGray" title="幂等键">幂等键</a> <a href="javascript:;" class="aLightGray" title="按钮禁用">按钮禁用</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/620045.html" class="aBlack" target="_blank" title="前端表单重复提交防护工作流：从按钮状态到请求取消和幂等键">前端表单重复提交防护工作流：从按钮状态到请求取消和幂等键</a> </dt> <dd class="cont2"> <span><i class="view"></i>374浏览</span> <span class="collectBtn user_collection" data-id="620045" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/620039.html" class="img_box" title="前端 CORS 预检失败排查流程：从请求头到网关响应"> <img src="/uploads/20260618/1781767364-frontend-cors-flow.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端 CORS 预检失败排查流程：从请求头到网关响应"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 5天前 | <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/4720_new_0_1.html" class="aLightGray" title="cors">cors</a> · <a href="/articletag/39980_new_0_1.html" class="aLightGray" title="跨域排查">跨域排查</a> · <a href="/articletag/39981_new_0_1.html" class="aLightGray" title="浏览器网络">浏览器网络</a> · <a href="/articletag/39982_new_0_1.html" class="aLightGray" title="接口联调">接口联调</a> · <a href="javascript:;" class="aLightGray" title="前端">前端</a> <a href="javascript:;" class="aLightGray" title="cors">cors</a> <a href="javascript:;" class="aLightGray" title="请求头">请求头</a> <a href="javascript:;" class="aLightGray" title="跨域">跨域</a> <a href="javascript:;" class="aLightGray" title="预检请求">预检请求</a> <a href="javascript:;" class="aLightGray" title="Options">Options</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/620039.html" class="aBlack" target="_blank" title="前端 CORS 预检失败排查流程：从请求头到网关响应">前端 CORS 预检失败排查流程：从请求头到网关响应</a> </dt> <dd class="cont2"> <span><i class="view"></i>422浏览</span> <span class="collectBtn user_collection" data-id="620039" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/620035.html" class="img_box" title="前端 position sticky 不生效排查：从滚动容器到 overflow 限制"> <img src="/uploads/20260618/1781761300-frontend-sticky-check-flow.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端 position sticky 不生效排查：从滚动容器到 overflow 限制"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 5天前 | <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/4729_new_0_1.html" class="aLightGray" title="css">css</a> · <a href="/articletag/9935_new_0_1.html" class="aLightGray" title="sticky">sticky</a> · <a href="/articletag/39972_new_0_1.html" class="aLightGray" title="布局排查">布局排查</a> · <a href="/articletag/39973_new_0_1.html" class="aLightGray" title="滚动容器">滚动容器</a> · <a href="javascript:;" class="aLightGray" title="CSS">CSS</a> <a href="javascript:;" class="aLightGray" title="前端">前端</a> <a href="javascript:;" class="aLightGray" title="Overflow">Overflow</a> <a href="javascript:;" class="aLightGray" title="position sticky">position sticky</a> <a href="javascript:;" class="aLightGray" title="滚动容器">滚动容器</a> <a href="javascript:;" class="aLightGray" title="吸顶失效">吸顶失效</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/620035.html" class="aBlack" target="_blank" title="前端 position sticky 不生效排查：从滚动容器到 overflow 限制">前端 position sticky 不生效排查：从滚动容器到 overflow 限制</a> </dt> <dd class="cont2"> <span><i class="view"></i>449浏览</span> <span class="collectBtn user_collection" data-id="620035" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/620015.html" class="img_box" title="前端图片懒加载实战：首屏 LCP 与滚动加载完整流程"> <img src="/uploads/20260617/1781673768-frontend-image-lazyload-flow.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端图片懒加载实战：首屏 LCP 与滚动加载完整流程"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 6天前 | <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/729_new_0_1.html" class="aLightGray" title="性能优化">性能优化</a> · <a href="/articletag/39948_new_0_1.html" class="aLightGray" title="图片加载">图片加载</a> · <a href="javascript:;" class="aLightGray" title="前端">前端</a> <a href="javascript:;" class="aLightGray" title="性能优化">性能优化</a> <a href="javascript:;" class="aLightGray" title="图片懒加载">图片懒加载</a> <a href="javascript:;" class="aLightGray" title="IntersectionObserver">IntersectionObserver</a> <a href="javascript:;" class="aLightGray" title="LCP">LCP</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/620015.html" class="aBlack" target="_blank" title="前端图片懒加载实战：首屏 LCP 与滚动加载完整流程">前端图片懒加载实战：首屏 LCP 与滚动加载完整流程</a> </dt> <dd class="cont2"> <span><i class="view"></i>105浏览</span> <span class="collectBtn user_collection" data-id="620015" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/620013.html" class="img_box" title="前端表单联动校验失效排查：旧状态、重复提交和提交锁"> <img src="/uploads/20260617/1781671884-frontend-form-bug-flow.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端表单联动校验失效排查：旧状态、重复提交和提交锁"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 6天前 | <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/729_new_0_1.html" class="aLightGray" title="性能优化">性能优化</a> · <a href="/articletag/39947_new_0_1.html" class="aLightGray" title="表单校验">表单校验</a> · <a href="javascript:;" class="aLightGray" title="JavaScript">JavaScript</a> <a href="javascript:;" class="aLightGray" title="前端">前端</a> <a href="javascript:;" class="aLightGray" title="表单校验">表单校验</a> <a href="javascript:;" class="aLightGray" title="重复提交">重复提交</a> <a href="javascript:;" class="aLightGray" title="提交锁">提交锁</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/620013.html" class="aBlack" target="_blank" title="前端表单联动校验失效排查：旧状态、重复提交和提交锁">前端表单联动校验失效排查：旧状态、重复提交和提交锁</a> </dt> <dd class="cont2"> <span><i class="view"></i>285浏览</span> <span class="collectBtn user_collection" data-id="620013" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/620012.html" class="img_box" title="前端长列表虚拟滚动实战：从可视区计算到滚动流畅"> <img src="/uploads/20260617/1781670928-frontend-virtual-list-before-after.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端长列表虚拟滚动实战：从可视区计算到滚动流畅"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 6天前 | <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/729_new_0_1.html" class="aLightGray" title="性能优化">性能优化</a> · <a href="/articletag/39783_new_0_1.html" class="aLightGray" title="虚拟列表">虚拟列表</a> · <a href="javascript:;" class="aLightGray" title="JavaScript">JavaScript</a> <a href="javascript:;" class="aLightGray" title="前端">前端</a> <a href="javascript:;" class="aLightGray" title="性能优化">性能优化</a> <a href="javascript:;" class="aLightGray" title="虚拟滚动">虚拟滚动</a> <a href="javascript:;" class="aLightGray" title="长列表优化">长列表优化</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/620012.html" class="aBlack" target="_blank" title="前端长列表虚拟滚动实战：从可视区计算到滚动流畅">前端长列表虚拟滚动实战：从可视区计算到滚动流畅</a> </dt> <dd class="cont2"> <span><i class="view"></i>111浏览</span> <span class="collectBtn user_collection" data-id="620012" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/619999.html" class="img_box" title="前端轮询接口越打越多怎么办：从重复定时器到清理机制一步步排查"> <img src="/uploads/20260616/1781600013-frontend-polling-cleanup-solution.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端轮询接口越打越多怎么办：从重复定时器到清理机制一步步排查"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 1星期前 | <a href="/articletag/215_new_0_1.html" class="aLightGray" title="定时器">定时器</a> · <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/39721_new_0_1.html" class="aLightGray" title="性能排查">性能排查</a> · <a href="/articletag/39918_new_0_1.html" class="aLightGray" title="接口请求">接口请求</a> · <a href="/articletag/39934_new_0_1.html" class="aLightGray" title="轮询">轮询</a> · <a href="/articletag/39935_new_0_1.html" class="aLightGray" title="setInterval">setInterval</a> · <a href="javascript:;" class="aLightGray" title="setInterval">setInterval</a> <a href="javascript:;" class="aLightGray" title="页面可见性">页面可见性</a> <a href="javascript:;" class="aLightGray" title="clearInterval">clearInterval</a> <a href="javascript:;" class="aLightGray" title="前端轮询">前端轮询</a> <a href="javascript:;" class="aLightGray" title="请求堆积">请求堆积</a> <a href="javascript:;" class="aLightGray" title="定时器清理">定时器清理</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/619999.html" class="aBlack" target="_blank" title="前端轮询接口越打越多怎么办：从重复定时器到清理机制一步步排查">前端轮询接口越打越多怎么办：从重复定时器到清理机制一步步排查</a> </dt> <dd class="cont2"> <span><i class="view"></i>490浏览</span> <span class="collectBtn user_collection" data-id="619999" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/619992.html" class="img_box" title="前端表单重复提交治理完整流程：按钮锁定、请求去重和幂等 key"> <img src="/uploads/20260616/1781592762-form-submit-idempotent-key.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端表单重复提交治理完整流程：按钮锁定、请求去重和幂等 key"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 1星期前 | <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/39919_new_0_1.html" class="aLightGray" title="状态管理">状态管理</a> · <a href="/articletag/39920_new_0_1.html" class="aLightGray" title="表单提交">表单提交</a> · <a href="/articletag/39921_new_0_1.html" class="aLightGray" title="防重复提交">防重复提交</a> · <a href="/articletag/39922_new_0_1.html" class="aLightGray" title="接口幂等">接口幂等</a> · <a href="javascript:;" class="aLightGray" title="重复提交">重复提交</a> <a href="javascript:;" class="aLightGray" title="前端表单">前端表单</a> <a href="javascript:;" class="aLightGray" title="请求去重">请求去重</a> <a href="javascript:;" class="aLightGray" title="按钮锁定">按钮锁定</a> <a href="javascript:;" class="aLightGray" title="幂等key">幂等key</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/619992.html" class="aBlack" target="_blank" title="前端表单重复提交治理完整流程：按钮锁定、请求去重和幂等 key">前端表单重复提交治理完整流程：按钮锁定、请求去重和幂等 key</a> </dt> <dd class="cont2"> <span><i class="view"></i>253浏览</span> <span class="collectBtn user_collection" data-id="619992" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/619990.html" class="img_box" title="前端搜索结果倒退怎么办：AbortController 取消旧请求和序号兜底"> <img src="/uploads/20260616/1781590765-frontend-search-race-fix.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端搜索结果倒退怎么办：AbortController 取消旧请求和序号兜底"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 1星期前 | <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/39916_new_0_1.html" class="aLightGray" title="搜索框">搜索框</a> · <a href="/articletag/39917_new_0_1.html" class="aLightGray" title="AbortController">AbortController</a> · <a href="/articletag/39918_new_0_1.html" class="aLightGray" title="接口请求">接口请求</a> · <a href="/articletag/39919_new_0_1.html" class="aLightGray" title="状态管理">状态管理</a> · <a href="javascript:;" class="aLightGray" title="Fetch">Fetch</a> <a href="javascript:;" class="aLightGray" title="AbortController">AbortController</a> <a href="javascript:;" class="aLightGray" title="前端搜索">前端搜索</a> <a href="javascript:;" class="aLightGray" title="请求乱序">请求乱序</a> <a href="javascript:;" class="aLightGray" title="旧响应覆盖">旧响应覆盖</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/619990.html" class="aBlack" target="_blank" title="前端搜索结果倒退怎么办：AbortController 取消旧请求和序号兜底">前端搜索结果倒退怎么办：AbortController 取消旧请求和序号兜底</a> </dt> <dd class="cont2"> <span><i class="view"></i>295浏览</span> <span class="collectBtn user_collection" data-id="619990" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/619979.html" class="img_box" title="前端图片懒加载布局抖动治理完整流程：占位比例、按需加载和 CLS 复查"> <img src="/uploads/20260616/1781579104-frontend-lazy-cls-overview.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端图片懒加载布局抖动治理完整流程：占位比例、按需加载和 CLS 复查"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 1星期前 | <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/729_new_0_1.html" class="aLightGray" title="性能优化">性能优化</a> · <a href="/articletag/34073_new_0_1.html" class="aLightGray" title="cls">cls</a> · <a href="/articletag/39909_new_0_1.html" class="aLightGray" title="懒加载">懒加载</a> · <a href="/articletag/39910_new_0_1.html" class="aLightGray" title="Core Web Vitals">Core Web Vitals</a> · <a href="javascript:;" class="aLightGray" title="前端">前端</a> <a href="javascript:;" class="aLightGray" title="图片懒加载">图片懒加载</a> <a href="javascript:;" class="aLightGray" title="IntersectionObserver">IntersectionObserver</a> <a href="javascript:;" class="aLightGray" title="CLS">CLS</a> <a href="javascript:;" class="aLightGray" title="布局稳定">布局稳定</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/619979.html" class="aBlack" target="_blank" title="前端图片懒加载布局抖动治理完整流程：占位比例、按需加载和 CLS 复查">前端图片懒加载布局抖动治理完整流程：占位比例、按需加载和 CLS 复查</a> </dt> <dd class="cont2"> <span><i class="view"></i>128浏览</span> <span class="collectBtn user_collection" data-id="619979" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/619973.html" class="img_box" title="前端 WebSocket 断线重连完整流程：心跳检测、退避重试和消息补发"> <img src="/uploads/20260616/1781541472-frontend-websocket-message-queue.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端 WebSocket 断线重连完整流程：心跳检测、退避重试和消息补发"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 1星期前 | <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/277_new_0_1.html" class="aLightGray" title="消息队列">消息队列</a> · <a href="/articletag/1017_new_0_1.html" class="aLightGray" title="websocket">websocket</a> · <a href="/articletag/39899_new_0_1.html" class="aLightGray" title="实时通信">实时通信</a> · <a href="/articletag/39900_new_0_1.html" class="aLightGray" title="断线重连">断线重连</a> · <a href="javascript:;" class="aLightGray" title="前端">前端</a> <a href="javascript:;" class="aLightGray" title="websocket">websocket</a> <a href="javascript:;" class="aLightGray" title="心跳检测">心跳检测</a> <a href="javascript:;" class="aLightGray" title="断线重连">断线重连</a> <a href="javascript:;" class="aLightGray" title="消息补发">消息补发</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/619973.html" class="aBlack" target="_blank" title="前端 WebSocket 断线重连完整流程：心跳检测、退避重试和消息补发">前端 WebSocket 断线重连完整流程：心跳检测、退避重试和消息补发</a> </dt> <dd class="cont2"> <span><i class="view"></i>365浏览</span> <span class="collectBtn user_collection" data-id="619973" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> <li> <div class="contBox"> <a href="/article/619962.html" class="img_box" title="前端弹窗层级治理工作流：从 z-index 混乱到 Portal 容器规范"> <img src="/uploads/20260615/1781506972-modal-layer-workflow.webp" onerror="this.src='/assets/images/moren/morentu.png'" alt="前端弹窗层级治理工作流：从 z-index 混乱到 Portal 容器规范"> </a> <dl> <dd class="cont1"> <span> <a href="/articlelist/19_new_0_1.html" class="aLightGray" title="文章">文章</a> · <a href="/articlelist/88_new_0_1.html" class="aLightGray" title="前端">前端</a> | 1星期前 | <a href="/articletag/228_new_0_1.html" class="aLightGray" title="工程化">工程化</a> · <a href="/articletag/243_new_0_1.html" class="aLightGray" title="前端">前端</a> · <a href="/articletag/4701_new_0_1.html" class="aLightGray" title="javascript">javascript</a> · <a href="/articletag/4729_new_0_1.html" class="aLightGray" title="css">css</a> · <a href="/articletag/39876_new_0_1.html" class="aLightGray" title="弹窗">弹窗</a> · <a href="javascript:;" class="aLightGray" title="前端">前端</a> <a href="javascript:;" class="aLightGray" title="z-index">z-index</a> <a href="javascript:;" class="aLightGray" title="遮罩层">遮罩层</a> <a href="javascript:;" class="aLightGray" title="stacking context">stacking context</a> <a href="javascript:;" class="aLightGray" title="Portal">Portal</a> <a href="javascript:;" class="aLightGray" title="弹窗层级">弹窗层级</a> </span> </dd> <dt class="lineOverflow"> <a href="/article/619962.html" class="aBlack" target="_blank" title="前端弹窗层级治理工作流：从 z-index 混乱到 Portal 容器规范">前端弹窗层级治理工作流：从 z-index 混乱到 Portal 容器规范</a> </dt> <dd class="cont2"> <span><i class="view"></i>350浏览</span> <span class="collectBtn user_collection" data-id="619962" data-type="article" title="收藏"><i class="collect"></i>收藏</span> </dd> </dl> </div> </li> </ul> </div> </div> <div class="mainRight">  <div class="rightContBox" style="margin-top: 0px;"> <div class="rightTit"> <a href="/courselist.html" class="more" title="查看更多">查看更多<i class="iconfont"></i></a> <div class="tit lineOverflow">课程推荐</div> </div> <ul class="lessonRecomRList"> <li> <a href="/course/9.html" class="img_box" target="_blank" title="前端进阶之JavaScript设计模式"> <img src="/uploads/20221222/52fd0f23a454c71029c2c72d206ed815.jpg" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="前端进阶之JavaScript设计模式"> </a> <dl> <dt class="lineTwoOverflow"><a href="/course/9.html" target="_blank" class="aBlack" title="前端进阶之JavaScript设计模式">前端进阶之JavaScript设计模式</a></dt> <dd class="cont1 lineTwoOverflow"> 设计模式是开发人员在软件开发过程中面临一般问题时的解决方案，代表了最佳的实践。本课程的主打内容包括JS常见设计模式以及具体应用场景，打造一站式知识长龙服务，适合有JS基础的同学学习。 </dd> <dd class="cont2">543次学习</dd> </dl> </li> <li> <a href="/course/2.html" class="img_box" target="_blank" title="GO语言核心编程课程"> <img src="/uploads/20221221/634ad7404159bfefc6a54a564d437b5f.png" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="GO语言核心编程课程"> </a> <dl> <dt class="lineTwoOverflow"><a href="/course/2.html" target="_blank" class="aBlack" title="GO语言核心编程课程">GO语言核心编程课程</a></dt> <dd class="cont1 lineTwoOverflow"> 本课程采用真实案例，全面具体可落地，从理论到实践，一步一步将GO核心编程技术、编程思想、底层实现融会贯通，使学习者贴近时代脉搏，做IT互联网时代的弄潮儿。 </dd> <dd class="cont2">516次学习</dd> </dl> </li> <li> <a href="/course/74.html" class="img_box" target="_blank" title="简单聊聊mysql8与网络通信"> <img src="/uploads/20240103/bad35fe14edbd214bee16f88343ac57c.png" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="简单聊聊mysql8与网络通信"> </a> <dl> <dt class="lineTwoOverflow"><a href="/course/74.html" target="_blank" class="aBlack" title="简单聊聊mysql8与网络通信">简单聊聊mysql8与网络通信</a></dt> <dd class="cont1 lineTwoOverflow"> 如有问题加微信：Le-studyg；在课程中，我们将首先介绍MySQL8的新特性，包括性能优化、安全增强、新数据类型等，帮助学生快速熟悉MySQL8的最新功能。接着，我们将深入解析MySQL的网络通信机制，包括协议、连接管理、数据传输等，让 </dd> <dd class="cont2">500次学习</dd> </dl> </li> <li> <a href="/course/57.html" class="img_box" target="_blank" title="JavaScript正则表达式基础与实战"> <img src="/uploads/20221226/bbe4083bb3cb0dd135fb02c31c3785fb.jpg" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="JavaScript正则表达式基础与实战"> </a> <dl> <dt class="lineTwoOverflow"><a href="/course/57.html" target="_blank" class="aBlack" title="JavaScript正则表达式基础与实战">JavaScript正则表达式基础与实战</a></dt> <dd class="cont1 lineTwoOverflow"> 在任何一门编程语言中,正则表达式,都是一项重要的知识,它提供了高效的字符串匹配与捕获机制,可以极大的简化程序设计。 </dd> <dd class="cont2">487次学习</dd> </dl> </li> <li> <a href="/course/28.html" class="img_box" target="_blank" title="从零制作响应式网站—Grid布局"> <img src="/uploads/20221223/ac110f88206daeab6c0cf38ebf5fe9ed.jpg" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="从零制作响应式网站—Grid布局"> </a> <dl> <dt class="lineTwoOverflow"><a href="/course/28.html" target="_blank" class="aBlack" title="从零制作响应式网站—Grid布局">从零制作响应式网站—Grid布局</a></dt> <dd class="cont1 lineTwoOverflow"> 本系列教程将展示从零制作一个假想的网络科技公司官网，分为导航，轮播，关于我们，成功案例，服务流程，团队介绍，数据部分，公司动态，底部信息等内容区块。网站整体采用CSSGrid布局，支持响应式，有流畅过渡和展现动画。 </dd> <dd class="cont2">485次学习</dd> </dl> </li> </ul> </div> <div class="rightContBox"> <div class="rightTit"> <a href="/ai.html" class="more" title="查看更多">查看更多<i class="iconfont"></i></a> <div class="tit lineOverflow">AI推荐</div> </div> <ul class="lessonRecomRList"> <li> <a href="/ai/13109.html" target="_blank" title="ljg-skills - "Prompt之神"李继刚开源的 AI 技能集" class="img_box"> <img src="/uploads/ai/20260616/ljg-skills-icon-8bbe1468e5.png" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="ljg-skills - "Prompt之神"李继刚开源的 AI 技能集" style="object-fit:cover;width:100%;height:100%;"> </a> <dl> <dt class="lineTwoOverflow"><a href="/ai/13109.html" class="aBlack" target="_blank" title="ljg-skills">ljg-skills</a></dt> <dd class="cont1 lineTwoOverflow"> ljg-skills 是李继刚开源的 AI 技能与提示词集合，面向大模型使用者整理了一批可复用的 prompt、角色设定和任务技能模板，适合用于学习提示词设计、搭建个人 AI 工作流和沉淀团队常用智能体能力。 </dd> <dd class="cont2">1763次使用</dd> </dl> </li> <li> <a href="/ai/13108.html" target="_blank" title="MELO音乐 - AI 音乐生成平台，支持多模态创作能力" class="img_box"> <img src="/uploads/ai/20260616/melo-icon-10bf590762.png" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="MELO音乐 - AI 音乐生成平台，支持多模态创作能力" style="object-fit:cover;width:100%;height:100%;"> </a> <dl> <dt class="lineTwoOverflow"><a href="/ai/13108.html" class="aBlack" target="_blank" title="MELO音乐">MELO音乐</a></dt> <dd class="cont1 lineTwoOverflow"> MELO音乐是一站式AI视频与音乐制作助手，对标suno, udio的高品质体验。提供伴奏生成、原创写词、无损导出、哼唱识曲、混音变声等全套音频与短视频编辑工具。无论是流行Kpop、电音说唱、民谣古风、摇滚儿歌还是商用轻音乐，MELO为你免费谱曲，轻松做同款！ </dd> <dd class="cont2">1696次使用</dd> </dl> </li> <li> <a href="/ai/13107.html" target="_blank" title="UniScribe - AI 免费在线音视频转文字平台" class="img_box"> <img src="/uploads/ai/20260616/uniscribe-icon-3c88366a15.png" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="UniScribe - AI 免费在线音视频转文字平台" style="object-fit:cover;width:100%;height:100%;"> </a> <dl> <dt class="lineTwoOverflow"><a href="/ai/13107.html" class="aBlack" target="_blank" title="UniScribe">UniScribe</a></dt> <dd class="cont1 lineTwoOverflow"> UniScribe 是一款 AI 音视频转文字与内容整理工具，支持上传音频、视频文件或粘贴 YouTube 链接，自动生成转写文本、摘要、思维导图和关键问题，并支持多格式导出，适合会议记录、课程学习、访谈整理和内容创作复盘。 </dd> <dd class="cont2">1635次使用</dd> </dl> </li> <li> <a href="/ai/13106.html" target="_blank" title="剧云 - 免费 AI 智能中文剧本创作平台" class="img_box"> <img src="/uploads/ai/20260615/d36c7176-icon-2b0cd581ce.png" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="剧云 - 免费 AI 智能中文剧本创作平台" style="object-fit:cover;width:100%;height:100%;"> </a> <dl> <dt class="lineTwoOverflow"><a href="/ai/13106.html" class="aBlack" target="_blank" title="剧云">剧云</a></dt> <dd class="cont1 lineTwoOverflow"> 剧云是专业中文剧本创作平台，安全稳定运行十余年，集成AI编剧、剧本医生审核、人物小传、剧情关系图、大纲编写、多人协作、Word导入导出、版权管控功能，数据安全防护，轻松高效创作剧本。 </dd> <dd class="cont2">1834次使用</dd> </dl> </li> <li> <a href="/ai/13105.html" target="_blank" title="万象有声 - AI 一站式有声内容创作平台" class="img_box"> <img src="/uploads/ai/20260615/50267bac-icon-c146b001b5.png" onerror="this.onerror='',this.src='/assets/images/moren/morentu.png'" alt="万象有声 - AI 一站式有声内容创作平台" style="object-fit:cover;width:100%;height:100%;"> </a> <dl> <dt class="lineTwoOverflow"><a href="/ai/13105.html" class="aBlack" target="_blank" title="万象有声">万象有声</a></dt> <dd class="cont1 lineTwoOverflow"> 万象有声，一个专为有声创作者打造的新一代智能有声内容创作平台。平台提供专业的智能拆章、智能画本编辑、AI配音、AI生成音效、后期制作、智能对轨、智能审听等有声创作全流程工具，可以帮助创作者高效、低成本创作出引人入胜的有声作品。立即体验，让有声书制作更简单！ </dd> <dd class="cont2">1819次使用</dd> </dl> </li> </ul> </div>  <div class="rightContBox"> <div class="rightTit"> <a href="/articlelist.html" class="more" title="查看更多">查看更多<i class="iconfont"></i></a> <div class="tit lineOverflow">相关文章</div> </div> <ul class="aboutArticleRList"> <li> <dl> <dt class="lineTwoOverflow"><a href="/article/207000.html" class="aBlack" title="JavaScript函数定义及示例详解">JavaScript函数定义及示例详解</a></dt> <dd> <span class="left">2025-05-11</span> <span class="right">502浏览</span> </dd> </dl> </li> <li> <dl> <dt class="lineTwoOverflow"><a href="/article/619053.html" class="aBlack" title="CSS变量简化按钮悬停效果技巧">CSS变量简化按钮悬停效果技巧</a></dt> <dd> <span class="left">2026-05-31</span> <span class="right">501浏览</span> </dd> </dl> </li> <li> <dl> <dt class="lineTwoOverflow"><a href="/article/618916.html" class="aBlack" title="JavaScript符号类型详解与应用">JavaScript符号类型详解与应用</a></dt> <dd> <span class="left">2026-05-31</span> <span class="right">501浏览</span> </dd> </dl> </li> <li> <dl> <dt class="lineTwoOverflow"><a href="/article/612539.html" class="aBlack" title="HTML剪贴板复制粘贴怎么用">HTML剪贴板复制粘贴怎么用</a></dt> <dd> <span class="left">2026-05-26</span> <span class="right">501浏览</span> </dd> </dl> </li> <li> <dl> <dt class="lineTwoOverflow"><a href="/article/611774.html" class="aBlack" title="data-属性详解：HTML数据存储与DOM操作技巧">data-属性详解：HTML数据存储与DOM操作技巧</a></dt> <dd> <span class="left">2026-05-25</span> <span class="right">501浏览</span> </dd> </dl> </li> </ul> </div> </div> </div> <div class="footer"> <div class="footerIn"> <div class="footLeft"> <div class="linkBox"> <a href="/about/1.html" target="_blank" class="aBlack" title="关于我们">关于我们</a> <a href="/about/5.html" target="_blank" class="aBlack" title="免责声明">免责声明</a> <a href="#" class="aBlack" title="意见反馈">意见反馈</a> <a href="/about/2.html" class="aBlack" target="_blank" title="联系我们">联系我们</a> <a href="/send.html" class="aBlack" title="广告合作">内容提交</a> <a href="/manual/go/" target="_blank" class="aBlack" title="手册">手册</a> </div> <div class="footTip">Golang学习网：公益在线Go学习平台，帮助Go学习者快速成长！</div> <div class="shareBox"> <span><i class="qq"></i>技术交流群</span> </div> <div class="copyRight"> Copyright 2023 http://www.17golang.com/ All Rights Reserved ｜ <a href="https://beian.miit.gov.cn/" target="_blank" title="备案">苏ICP备2023003363号-1</a> </div> </div> <div class="footRight"> <ul class="encodeList"> <li> <div class="encodeImg"> <img src="/assets/examples/qrcode_for_gh.jpg" alt="Golang学习网"> </div> <div class="tit">关注公众号</div> <div class="tip">Golang学习网</div> </li> <div class="clear"></div> </ul> </div> <div class="clear"></div> </div> </div>  <style> .popupBg .n-error{ color: red; } </style> <div class="popupBg"> <div class="loginBoxBox"> <div class="imgbg"> <img src="/assets/images/leftlogo.jpg" alt=""> </div>  <div class="loginInfo encodeLogin" style="display: none;"> <div class="closeIcon" onclick="$('.popupBg').hide();"></div> <div class="changeLoginType cursorPointer create_wxqrcode" onclick="$('.loginInfo').hide();$('.passwordLogin').show();"> <div class="tip">密码登录在这里</div> </div> <div class="encodeInfo"> <div class="tit"><i></i> 微信扫码登录或注册</div> <div class="encodeImg"> <span id="wx_login_qrcode"><img src="/assets/examples/code.png" alt="二维码"></span>  </div> <div class="tip">打开微信扫一扫，快速登录/注册</div> </div> <div class="beforeLoginTip">登录即同意 <a href="#" class="aBlue" title="用户协议">用户协议</a> 和 <a href="#" class="aBlue" title="隐私政策">隐私政策</a></div> </div>  <div class="loginInfo passwordLogin"> <div class="closeIcon" onclick="$('.popupBg').hide();"></div> <div class="changeLoginType cursorPointer create_wxqrcode" onclick="$('.loginInfo').hide();$('.encodeLogin').show();"> <div class="tip">微信登录更方便</div> </div> <div class="passwordInfo"> <ul class="logintabs selfTabMenu"> <li class="selfTabItem loginFormLi curr">密码登录</li> <li class="selfTabItem registerFormBox ">注册账号</li> </ul> <div class="selfTabContBox"> <div class="selfTabCont loginFormBox" style="display: block;"> <form name="form" id="login-form" class="form-vertical form" method="POST" action="/index/user/login"> <input type="hidden" name="url" value="//www.17golang.com/article/518862.html"/> <input type="hidden" name="token" value="33f64042e8849be9e5c60b0a7107dbf6" /> <div class="form-group" style="height:70px;"> <input class="form-control" id="account" type="text" name="account" value="" data-rule="required" placeholder="邮箱/用户名" autocomplete="off"> </div> <div class="form-group" style="height:70px;"> <input class="form-control" id="password" type="password" name="password" data-rule="required;password" placeholder="密码" autocomplete="off"> </div> <div class="codeBox" style="height:70px;"> <div class="form-group" style="height:70px; width:205px; float: left;"> <input type="text" name="captcha" class="form-control" placeholder="验证码" data-rule="required;length(4)" /> </div> <span class="input-group-btn" style="padding:0;border:none;"> <img src="/captcha.html" width="100" height="45" onclick="this.src = '/captcha.html?r=' + Math.random();"/> </span> </div> <div class="other"> <a href="#" class="forgetPwd aGray" onclick="$('.loginInfo').hide();$('.passwordForget').show();" title="忘记密码">忘记密码</a> </div> <div class="loginBtn mt25"> <button type="submit">登录</button> </div> </form> </div> <div class="selfTabCont registerFormBox" style="display: none;"> <form name="form1" id="register-form" class="form-vertical form" method="POST" action="/index/user/register"> <input type="hidden" name="invite_user_id" value="0"/> <input type="hidden" name="url" value="//www.17golang.com/article/518862.html"/> <input type="hidden" name="token" value="33f64042e8849be9e5c60b0a7107dbf6" /> <div class="form-group" style="height:70px;"> <input type="text" name="email" id="email2" data-rule="required;email" class="form-control" placeholder="邮箱"> </div> <div class="form-group" style="height:70px;"> <input type="text" id="username" name="username" data-rule="required;username" class="form-control" placeholder="用户名必须3-30个字符"> </div> <div class="form-group" style="height:70px;"> <input type="password" id="password2" name="password" data-rule="required;password" class="form-control" placeholder="密码必须6-30个字符"> </div> <div class="codeBox" style="height:70px;"> <div class="form-group" style="height:70px; width:205px; float: left;"> <input type="text" name="captcha" class="form-control" placeholder="验证码" data-rule="required;length(4)" /> </div> <span class="input-group-btn" style="padding:0;border:none;"> <img src="/captcha.html" width="100" height="45" onclick="this.src = '/captcha.html?r=' + Math.random();"/> </span> </div> <div class="loginBtn"> <button type="submit">注册</button> </div> </form> </div> </div> </div> <div class="beforeLoginTip">登录即同意 <a href="https://www.17golang.com/about/3.html" target="_blank" class="aBlue" title="用户协议">用户协议</a> 和 <a href="https://www.17golang.com/about/4.html" target="_blank" class="aBlue" title="隐私政策">隐私政策</a></div> </div>  <div class="loginInfo passwordForget"> <div class="closeIcon" onclick="$('.popupBg').hide();"></div> <div class="returnLogin cursorPointer" onclick="$('.passwordForget').hide();$('.passwordLogin').show();">返回登录</div> <div class="passwordInfo"> <ul class="logintabs selfTabMenu"> <li class="selfTabItem">重置密码</li> </ul> <div class="selfTabContBox"> <div class="selfTabCont"> <form id="resetpwd-form" class="form-horizontal form-layer nice-validator n-default n-bootstrap form" method="POST" action="/api/user/resetpwd.html" novalidate="novalidate"> <div style="height:70px;"> <input type="text" class="form-control" id="email" name="email" value="" placeholder="输入邮箱" aria-invalid="true"> </div> <div class="codeBox" style="height:70px;"> <div class="form-group" style="height:70px; width:205px; float: left;"> <input type="text" name="captcha" class="form-control" placeholder="验证码" /> </div> <span class="input-group-btn" style="padding:0;border:none;"> <a href="javascript:;" class="btn btn-primary btn-captcha cursorPointer" style="background: #2080F8; border-radius: 4px; color: #fff; padding: 12px; position: absolute;" data-url="/api/ems/send.html" data-type="email" data-event="resetpwd">发送验证码</a> </span> </div> <input type="password" class="form-control" id="newpassword" name="newpassword" value="" placeholder="请输入6-18位密码"> <div class="loginBtn mt25"> <button type="submit">重置密码</button> </div> </form> </div> </div> </div> </div> </div> </div> <script src="/assets/js/juejin-theme.js?v=20260613b" defer></script> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?3dc5666f6478c7bf39cd5c91e597423d"; hm.async = true; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script> <script src="/assets/js/frontend/common.js"></script> </body> </html>

HTML5多行文本框怎么添加

rows 和 cols 是提示值，不是绝对限制

如何获取和设置内容？别用 value 属性读取

`rows` 和 `cols` 是提示值，不是绝对限制

如何获取和设置内容？别用 `value` 属性读取