代码如下：
1 1 2 2 3 3 4 4 5 5div模拟textarea自适应高度le> 6 6 <style type="text/css"> 7 7 .test_box{ 8 8 width:500px; 9 9 min-height:200px; 10 10 max-height:600px; 11 11 _height:200px;/*兼容IE6浏览器*/ 12 12 margin:0 auto; 13 13 padding:3px; 14 14 outline:0; 15 15 border:1px solid #e4e4e4; 16 16 font-size:12px; 17 17 word-wrap:break-word;/*用于英文文本自动换行，所有主流浏览器支持*/ 18 18 overflow-x:hidden; 19 19 overflow-y:auto; 20 20 -webkit-user-modify: read-write-plaintext-only; 21 21 } 22 22 </style> 23 23 </head> 24 24 <body> 25 25 <div class="test_box" contenteditable="true">我是模拟textarea的div</div> 26 26 34 34 </body> 35 35 </html></pre></div> <p>其中有一两个从没见过的属性：</p> <li>-webkit-user-modify: read-only | read-write | read-write-plaintext-only<br /> <table style="font: 14px/25.2px 'Microsoft Yahei', 微软雅黑, Arial, 'Hiragino Sans GB', 宋体; margin: 0px 0px 10px; padding: 0px; border: 1px solid #dddddd; width: 687px; color: #666666; text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; vertical-align: baseline; white-space: normal; border-collapse: collapse; -ms-word-break: break-all; -ms-word-wrap: break-word; border-spacing: 0px; widows: 1; font-size-adjust: none; font-stretch: inherit; background-color: #ffffff; -webkit-text-stroke-width: 0px;"> <tbody style="font: inherit; margin: 0px; padding: 0px; border: 0px currentColor; vertical-align: baseline; font-size-adjust: inherit; font-stretch: inherit;"> <tr style="font: inherit; margin: 0px; padding: 0px; border: 0px currentColor; vertical-align: baseline; font-size-adjust: inherit; font-stretch: inherit;"><th style="border-width: 0px 1px 1px 0px; margin: 0px; padding: 4px 8px; line-height: inherit; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: bold; vertical-align: baseline; border-right-color: #dddddd; border-bottom-color: #dddddd; border-right-style: solid; border-bottom-style: solid; font-stretch: inherit;">read-only</th> <td style="border-width: 0px 1px 1px 0px; font: inherit; margin: 0px; padding: 4px 8px; vertical-align: baseline; border-right-color: #dddddd; border-bottom-color: #dddddd; border-right-style: solid; border-bottom-style: solid; font-size-adjust: inherit; font-stretch: inherit;">内容只读。</td> </tr> <tr style="font: inherit; margin: 0px; padding: 0px; border: 0px currentColor; vertical-align: baseline; font-size-adjust: inherit; font-stretch: inherit;"><th style="border-width: 0px 1px 1px 0px; margin: 0px; padding: 4px 8px; line-height: inherit; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: bold; vertical-align: baseline; border-right-color: #dddddd; border-bottom-color: #dddddd; border-right-style: solid; border-bottom-style: solid; font-stretch: inherit;">read-write</th> <td style="border-width: 0px 1px 1px 0px; font: inherit; margin: 0px; padding: 4px 8px; vertical-align: baseline; border-right-color: #dddddd; border-bottom-color: #dddddd; border-right-style: solid; border-bottom-style: solid; font-size-adjust: inherit; font-stretch: inherit;">内容可读写。</td> </tr> <tr style="font: inherit; margin: 0px; padding: 0px; border: 0px currentColor; vertical-align: baseline; font-size-adjust: inherit; font-stretch: inherit;"><th style="border-width: 0px 1px 1px 0px; margin: 0px; padding: 4px 8px; line-height: inherit; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: bold; vertical-align: baseline; border-right-color: #dddddd; border-bottom-color: #dddddd; border-right-style: solid; border-bottom-style: solid; font-stretch: inherit;">read-write-plaintext-only</th> <td style="border-width: 0px 1px 1px 0px; font: inherit; margin: 0px; padding: 4px 8px; vertical-align: baseline; border-right-color: #dddddd; border-bottom-color: #dddddd; border-right-style: solid; border-bottom-style: solid; font-size-adjust: inherit; font-stretch: inherit;">内容可读写，但粘贴内容中的富文本格式（如文本的颜色、大小，图片等）会丢失。内容类似于以纯文本显示。</td> </tr> </tbody> </table> </li> <li> contenteditable 属性规定是否可编辑元素的内容。<br /> <table style="font: 14px/25.2px 'Microsoft Yahei', 微软雅黑, Arial, 'Hiragino Sans GB', 宋体; margin: 0px 0px 10px; padding: 0px; border: 1px solid #dddddd; width: 687px; color: #666666; text-transform: none; text-indent: 0px; letter-spacing: normal; word-spacing: 0px; vertical-align: baseline; white-space: normal; border-collapse: collapse; -ms-word-break: break-all; -ms-word-wrap: break-word; border-spacing: 0px; widows: 1; font-size-adjust: none; font-stretch: inherit; background-color: #ffffff; -webkit-text-stroke-width: 0px;"> <tbody style="font: inherit; margin: 0px; padding: 0px; border: 0px currentColor; vertical-align: baseline; font-size-adjust: inherit; font-stretch: inherit;"> <tr style="font: inherit; margin: 0px; padding: 0px; border: 0px currentColor; vertical-align: baseline; font-size-adjust: inherit; font-stretch: inherit;"><th style="border-width: 0px 1px 1px 0px; margin: 0px; padding: 4px 8px; line-height: inherit; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: bold; vertical-align: baseline; border-right-color: #dddddd; border-bottom-color: #dddddd; border-right-style: solid; border-bottom-style: solid; font-stretch: inherit;">true</th> <td style="border-width: 0px 1px 1px 0px; font: inherit; margin: 0px; padding: 4px 8px; vertical-align: baseline; border-right-color: #dddddd; border-bottom-color: #dddddd; border-right-style: solid; border-bottom-style: solid; font-size-adjust: inherit; font-stretch: inherit;">规定可以编辑元素内容。</td> </tr> <tr style="font: inherit; margin: 0px; padding: 0px; border: 0px currentColor; vertical-align: baseline; font-size-adjust: inherit; font-stretch: inherit;"><th style="border-width: 0px 1px 1px 0px; margin: 0px; padding: 4px 8px; line-height: inherit; font-family: inherit; font-size: inherit; font-style: inherit; font-variant: inherit; font-weight: bold; vertical-align: baseline; border-right-color: #dddddd; border-bottom-color: #dddddd; border-right-style: solid; border-bottom-style: solid; font-stretch: inherit;">false</th> <td style="border-width: 0px 1px 1px 0px; font: inherit; margin: 0px; padding: 4px 8px; vertical-align: baseline; border-right-color: #dddddd; border-bottom-color: #dddddd; border-right-style: solid; border-bottom-style: solid; font-size-adjust: inherit; font-stretch: inherit;">规定无法编辑元素内容。</td> </tr> </tbody> </table> </li> <p> </p> <p> 再次感谢鑫大神（http://www.zhangxinxu.com/），分享了好多非常实用的经验，等将来能达到他那种高度，我也想写出好博客分享出来造福人类，哈哈，虽然还很遥远，继续fighting~</p><p><script type="text/javascript" src="https://jss.51dongshi.net/pcwz/dysph.js"></script></div> <div class="downbox clearfix"> <div class="ico"><img src="https://js.51dongshi.net/tpl/pc2/images/document.png" alt="文档"></div> <div class="txt"> <h4>div模拟textarea自适应高度-DTBelieve</h4> <div class="co">div模拟textarea自适应高度-DTBelieve:之前在公司做项目的时候，有这么一个需求，要我写一个评论框，可以随着评论的行数增加而自动扩大，最开始我想用textarea实现，但是后来尝试后发现textarea并不适合，textarea的高度不会随着输入行数的增多而增大，于是我上网寻求了下帮助，发现大神张鑫旭的这</div> <div class="tj"><b>推荐度：</b><div class="tj_stars_list"><i class="tj_stars tj_05"></i></div></div> </div> <div class="btn"> <a href="javascript:;" class="html2word" data-model="article" data-id="addcge" title="文档下载"> <b>点击下载本文</b> <span>文档为doc格式</span> </a> </div> </div> <script>keji_detail_ga('article_content_bottom');</script> <div class="tvideo_tag"> 标签： <a href="/tlist-694574/">div</a> <a href="/tlist-2133454/">高度自适应</a> <a href="/tlist-2142807/">textarea</a> </div> <div class="tvideo_box tvideo_box_tab"> <div class="hd"> <ul><li class="on">热门焦点</li><script>keji_detail_ga('hot_jiaodian_tab_title');</script></ul> </div> <div class="bd"> <ul class="ult_jpic clearfix"> <script>get_hot_jiaodian_content('wz_hot_jiaodian',33,'hot',1);</script> </ul> </div> </div> </div> <!--中间文章 end--> <!--右侧专题 star--> <div class="ult_zt"> <script>keji_detail_ga('article_right_top');</script> <div class="ult_ztbox"> <h4>最新推荐</h4> <ul class="tvideo_r_a clearfix"> <script>get_detail_right('wz_right_new',33,'')</script> </ul> </div> <script>keji_detail_ga('article_right_middle');</script> <div class="ult_ztbox"> <h4>猜你喜欢</h4> <ul class="telist_rb clearfix"> <script>get_detail_right('wz_right_love',33,'')</script> </ul> </div> <script>keji_detail_ga('article_right_new_bottom');</script> <div class="ult_ztbox"> <h4>热门推荐</h4> <ul class="tvideo_r_b clearfix"> <script>get_detail_right('wz_right_hot',33,'')</script> </ul> </div> <script>keji_detail_ga('article_right_bottom');</script> </div> <!--右侧专题 end--> <div style="display:none"><a href="https://www.51dongshi.net/wzztf/ad/addcge/">专题</a> </div> </div> </div> <script src="https://js.51dongshi.net/plug/qrcode/qrcode.min.js"></script> <script src="https://js.51dongshi.net/js/share.js" charset="UTF-8"></script> <script type="text/javascript" src="https://js.51dongshi.net/tpl/pc2/js/waypoints.min.js"></script> <script type="text/javascript" src="https://js.51dongshi.net/tpl/pc2/js/icon_step.js"></script> <style> #qrcode{padding: 15px;background: #fff;} </style> <div id="qrcode" style="display: none"></div> <script>new QRCode(document.getElementById("qrcode"), "https://m.51dongshi.net/eedfaddcge.html");</script> <iframe src="https://hits.51dongshi.net/?biao=ho_article&id=922840" border="0" frameborder="0" style="width: 0px; 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