javascript JavaScript折疊手風琴
[英]html javascript collapse accordion
問題描述
我在側面導航窗口中有一個手風琴。 如果我打開所有面板，則在我關閉側面導航面板時它們將保持打開狀態。 我希望手風琴關閉時我的手風琴能合攏。 我的代碼已附加。
<!DOCTYPE html> <html> <head> <style> body { font-family: "Lato", sans-serif; } .sidenav { height: 100%; width: 0; position: fixed; z-index: 1; top: 0; left: 0; background-color: #111; overflow-x: hidden; transition: 0.5s; padding-top: 60px; } .sidenav a { padding: 8px 8px 8px 32px; text-decoration: none; font-size: 25px; color: #818181; display: block; transition: 0.3s; } .sidenav a:hover, .offcanvas a:focus{ color: #f1f1f1; } .sidenav .closebtn { position: absolute; top: 0; right: 25px; font-size: 36px; margin-left: 50px; } #main { transition: margin-left .5s; padding: 16px; } @media screen and (max-height: 450px) { .sidenav {padding-top: 15px;} .sidenav a {font-size: 18px;} } button.accordion { background-color: #eee; color: #444; cursor: pointer; padding: 18px; width: 100%; border: none; text-align: left; outline: none; font-size: 15px; transition: 0.4s; } button.accordion.active, button.accordion:hover { background-color: #ddd; } button.accordion:after { content: '\\002B'; color: #777; font-weight: bold; float: right; margin-left: 5px; } button.accordion.active:after { content: "\\2212"; } div.panel { padding: 0 18px; background-color: white; max-height: 0; overflow: hidden; transition: max-height 0.2s ease-out; } </style> </head> <body> <div id="mySidenav" class="sidenav"> <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a> <button class="accordion">Section 1</button> <div class="panel"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> </div> <button class="accordion">Section 2</button> <div class="panel"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> </div> <button class="accordion">Section 3</button> <div class="panel"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> </div> </div> <div id="main"> <span style="font-size:30px;cursor:pointer" onclick="openNav()">☰ open</span> </div> <script> function openNav() { document.getElementById("mySidenav").style.width = "250px"; document.getElementById("main").style.marginLeft = "250px"; } function closeNav() { document.getElementById("mySidenav").style.width = "0"; document.getElementById("main").style.marginLeft= "0"; } var acc = document.getElementsByClassName("accordion"); var i; for (i = 0; i < acc.length; i++) { acc[i].onclick = function() { this.classList.toggle("active"); var panel = this.nextElementSibling; if (panel.style.maxHeight){ panel.style.maxHeight = null; } else { panel.style.maxHeight = panel.scrollHeight + "px"; } } } </script> </body> </html>
1 個解決方案
解決方案1
0 已采納 2017-05-25 23:53:52
您可以創建一個打開/關閉面板的函數，並在closeNav()循環瀏覽面板並將其全部關閉。
<!DOCTYPE html> <html> <head> <style> body { font-family: "Lato", sans-serif; } .sidenav { height: 100%; width: 0; position: fixed; z-index: 1; top: 0; left: 0; background-color: #111; overflow-x: hidden; transition: 0.5s; padding-top: 60px; } .sidenav a { padding: 8px 8px 8px 32px; text-decoration: none; font-size: 25px; color: #818181; display: block; transition: 0.3s; } .sidenav a:hover, .offcanvas a:focus { color: #f1f1f1; } .sidenav .closebtn { position: absolute; top: 0; right: 25px; font-size: 36px; margin-left: 50px; } #main { transition: margin-left .5s; padding: 16px; } @media screen and (max-height: 450px) { .sidenav { padding-top: 15px; } .sidenav a { font-size: 18px; } } button.accordion { background-color: #eee; color: #444; cursor: pointer; padding: 18px; width: 100%; border: none; text-align: left; outline: none; font-size: 15px; transition: 0.4s; } button.accordion.active, button.accordion:hover { background-color: #ddd; } button.accordion:after { content: '\\002B'; color: #777; font-weight: bold; float: right; margin-left: 5px; } button.accordion.active:after { content: "\\2212"; } div.panel { padding: 0 18px; background-color: white; max-height: 0; overflow: hidden; transition: max-height 0.2s ease-out; } </style> </head> <body> <div id="mySidenav" class="sidenav"> <a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a> <button class="accordion">Section 1</button> <div class="panel"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> </div> <button class="accordion">Section 2</button> <div class="panel"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> </div> <button class="accordion">Section 3</button> <div class="panel"> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p> </div> </div> <div id="main"> <span style="font-size:30px;cursor:pointer" onclick="openNav()">☰ open</span> </div> <script> var acc = document.getElementsByClassName("accordion"); var i; function openNav() { document.getElementById("mySidenav").style.width = "250px"; document.getElementById("main").style.marginLeft = "250px"; } function closeNav() { document.getElementById("mySidenav").style.width = "0"; document.getElementById("main").style.marginLeft = "0"; for (i = 0; i < acc.length; i++) { closePanel(acc[i]); } } function openPanel(el) { el.classList.add("active"); el.nextElementSibling.style.maxHeight = el.nextElementSibling.scrollHeight + "px"; } function closePanel(el) { el.classList.remove("active"); el.nextElementSibling.style.maxHeight = null; } for (i = 0; i < acc.length; i++) { acc[i].onclick = function() { if (this.classList.contains("active")) { closePanel(this); } else { openPanel(this); } }; } </script> </body> </html>
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