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div模拟textarea自适应高度_html/css_WEB-ITnose

时间:2021-07-01 10:21:17 帮助过:22人阅读

  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篇文章《div模拟textarea文本域轻松实现高度自适应》,成功解决我的问题

代码如下:

 1  1  2  2  3  3  4  4      5  5     div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     <script type="text/javascript">27 27         if (typeof document.webkitHidden == "undefined") {28 28             // 非chrome浏览器阻止粘贴29 29             box.onpaste = function() {30 30                 return false;31 31             }32 32         }33 33     </ script>34 34 </body>35 35 </html></script></pre>    </p>    <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>            <tr>       read-only       <td>内容只读。</td>      </tr>      <tr>       read-write       <td>内容可读写。</td>      </tr>      <tr>       read-write-plaintext-only       <td>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>      </table></li>    <li> contenteditable 属性规定是否可编辑元素的内容。<br />     <table>            <tr>       true       <td>规定可以编辑元素内容。</td>      </tr>      <tr>       false       <td>规定无法编辑元素内容。</td>      </tr>      </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~                    </div>

                  

	 	
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