HTML 中的DOM onkeydown 事件在用户按下某个键时发生。 与 onkeydown 事件相关的事件顺序： 按键按下 按键 上键 支持的 HTML 标签：所有 HTML 元素，除了： <基地> <头> </li> <li> <元></li> <li> <参数></li> <li> <脚本></li> <li> <样式></li> <li> <标题></li> </ul> <p><strong>句法：</strong></p> <ul> <li><strong>在 HTML 中：</strong> <div class="hcb_wrap"> <pre class="prism line-numbers lang-html" data-lang="HTML"><code class="replace"><element onkeydown="myScript">></code></pre> </div> </li> <li><strong>在 JavaScript 中：</strong> <div class="hcb_wrap"> <pre class="prism line-numbers lang-html" data-lang="HTML"><code class="replace">object.onkeydown = function(){myScript};</code></pre> </div> </li> <li><strong>在 JavaScript 中，使用 addEventListener() 方法：</strong> <div class="hcb_wrap"> <pre class="prism line-numbers lang-html" data-lang="HTML"><code class="replace">object.addEventListener("keydown", myScript);</code></pre> </div> </li> </ul> <p><strong>示例：</strong>使用 addEventListener() 方法的 onkeydown 事件</p> <p></p> <div class="_ap_apex_ad" id="d6f45c53-ff16-4cc5-8b91-eb6ee7037116" style="min-height:280px"></div> <p></p> <div class="hcb_wrap"> <pre class="prism line-numbers lang-html" data-lang="HTML"><code class="replace"><!DOCTYPE html> <html> <body> <center> <h1 style="color:green"> GeekforGeeks </h1> <p>Press any key inside the input field</p> <input type="text" id="inputField" style="background-color:green"> <script> document.getElementById( "inputField").addEventListener("keydown", GFGFun); function GFGFun() { document.getElementById( "inputField").style.backgroundColor = "yellow"; } </script> </center> </body> </html> </code></pre> </div> <p><strong>输出：</strong><br/><strong>前：</strong> <br/><img alt="" class="img-fluid" src="https://mangodoc.oss-cn-beijing.aliyuncs.com/geek8geeks/HTML_%7C_DOM_onkeydown_Event_0.jpg"/></p> <p><strong>后：</strong> <br/><img alt="" class="img-fluid" src="https://mangodoc.oss-cn-beijing.aliyuncs.com/geek8geeks/HTML_%7C_DOM_onkeydown_Event_1.jpg"/></p> <p><strong>支持的浏览器：</strong> <strong>HTML DOM onkeydown 事件</strong>支持的浏览器如下：</p> <ul> <li>谷歌浏览器</li> <li>IE浏览器</li> <li>火狐</li> <li>苹果Safari</li> <li>歌剧</li> </ul> <div class="_ap_apex_ad" id="82d2079a-8120-480f-9fc7-5cda825d56e7" style="min-height:280px"></div> <p></p></div> </article> </div> </div> </div> </div> </div> <footer> <div class="bg-white text-center pb-1"> <p class="text-body-tertiary pt-3 lh-lg text-opacity-50" id="footer-text">Copyright © 2020 - 2024 版权所有 <br> <a href="https://beian.miit.gov.cn/" target="_blank" class="text-opacity-50 text-body-tertiary mt-1 mb-1">蜀ICP备20006366号-1</a> <br> Made with ❤️ in Chengdu </p> </div> </footer> <!-- 引入Bootstrap JavaScript库 --> <script src="https://unpkg.com/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js" crossorigin="anonymous"></script> <!-- 引入Meilisearch搜索相关的JavaScript库 --> <script src="https://cdn.jsdelivr.net/npm/@meilisearch/instant-meilisearch/dist/instant-meilisearch.umd.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/instantsearch.js@4"></script> <script src="https://imangodoc.com/static/javascript/meili_custom.js"></script> <!-- 引入prismjs代码高亮相关的JavaScript库 --> <script src="https://cdn.jsdelivr.net/npm/prismjs@1.29.0/components/prism-core.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/prismjs@1.29.0/plugins/toolbar/prism-toolbar.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/prismjs@1.29.0/plugins/autoloader/prism-autoloader.min.js"></script> <script src="https://cdn.jsdelivr.net/npm/prismjs@1.29.0/plugins/copy-to-clipboard/prism-copy-to-clipboard.min.js"></script> </body> </html>