首页 > 解决方案 > 添加 tag inside a <select> tag after clicking an option on React.js</h1> <div id="body"><p>So basically, I got the following JSX file and I want to have an event handler that listens to an event that is generated after clic</p> </div> <div class="container" id="article"> <div class="page-header"> <h1>javascript - 添加<textarea> tag inside a <select> tag after clicking an option on React.js</h1> <div id="body"><p>So basically, I got the following JSX file and I want to have an event handler that listens to an event that is generated after clic</h1> </div> <div class="con"> <h3>问题描述</h3> <p class="author">标签： <span>javascript</span><span>reactjs</span><span>forms</span><span>drop-down-menu</span><span>jsx</span></div> <h3>解决方案</h3> <hr> <div class="con "> <div class="body"> <p>您可以根据 / 的值在<code>input</code>/上设置一个类。像这样：<code>textarea</code><code>select</code></p> <pre><code><Select value={this.state.selectedOption} onChange={this.handleSelect} name="colour" label="Colour *"> <option value="">-Select-</option> <option value="Vokera">Blue</option> <option value="Warmflow">Red</option> <option value="Worcester">Yellow</option> <option value="Other">Other</option> </Select> // Or textarea <input type="text" value="" name=" className={this.state.selectedOption !== 'Other'?"hidden":""}/> </code></pre> <p><code>hidden</code>这会为您的输入添加一个类。现在你可以使用<code>.hidden{ diplay:none; }</code></p> <p>此函数将处理您的值的更改：</p> <pre><code>handleSelect(evt){ this.setState({ selectedOption: evt.target.value }) } </code></pre> </div> <div class="clear"></div> </div> <hr> <h3>推荐阅读</h3> <ul> <li><a href="/question/65504670.html">c - 无法理解函数中c中的指针</a></li><li><a href="/question/65504672.html">excel - 在excel VBA中复制行范围从Sheet1到Sheet2</a></li><li><a href="/question/65504674.html">python - 使用 Python 和 Pytest 模拟类属性和方法</a></li><li><a href="/question/65504676.html">flutter - 用户如何选择特定的文件位置在 Flutter 中保存文件</a></li><li><a href="/question/65504679.html">microsoft-graph-api - 使用图形 API 创建令牌发行策略时在定义值中传递什么</a></li><li><a href="/question/65504680.html">php - 发送电子邮件的警报消息未显示</a></li><li><a href="/question/65504681.html">c# - 如何处理每个资源的多个查询？</a></li><li><a href="/question/65504684.html">angular - 如何防止一种状态的 ONE 字段被 NgxsStoragePluginModule 持久化</a></li><li><a href="/question/65504685.html">c# - 为什么在 Windows Forms Visual Studio 中控制台输出有问号而不是汉字？</a></li><li><a href="/question/65504686.html">php - 无法访问我的公共文件夹中的 css 文件 - laravel 6.2</a></li> </ul> </div> <footer> <p><a href="/">时间戳在线转换</a></p> </footer> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-6117966252207595" crossorigin="anonymous"></script> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?7145e10314e5e27e886ad54be2aeb067"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script> </body></html>