[js] - 導航展出動畫
阿新 • • 發佈：2021-06-22
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>選單展出動畫</title> <style> html,body{ margin: 0; padding: 0; box-sizing: border-box; } ul{ padding: 0; margin: 0; overflow: hidden; background-color: bisque; } ul li{ height: 60px; line-height: 60px; text-align: center; list-style: none; cursor: pointer; } ul li:hover{ background-color: aquamarine; } .show{ animation: show 1s ease-in-out forwards; } .hide{ animation: hide .3s forwards; } @keyframes show{ from{ height: 0px; } to{ height: 240px; } } @keyframes hide { from{ height: 240px; } to{ height: 0px; } } #toggle{ position: absolute; z-index: 10; padding: 10px 20px; } </style> </head> <body> <input type="submit" value="切換" id="toggle"> <ul class="show"> <li> <a>首頁</a> </li> <li> <a>首頁</a> </li> <li> <a>首頁</a> </li> <li> <a>首頁</a> </li> </ul> <script> const toggle = document.querySelector("#toggle"); const ul = document.querySelector("ul") toggle.addEventListener("click",function(){ if(getComputedStyle(ul).height=="0px"){ ul.classList.remove("hide") ul.classList.add("show"); }else{ ul.classList.remove("show") ul.classList.add("hide"); } },) </script> </body> </html>