所以,我正在使用 Bootstrap 创建这个导航东西,它将以选项卡的形式出现在桌面上,而对于移动设备来说,它将是一个手风琴。它几乎完成了,除了这个错误我无法解决。
问题:如果我单击桌面版本中的任何选项卡(例如链接#3),然后切换到移动设备,则会打开正确的选项卡(即链接#3),但是当我单击它关闭选项卡并隐藏内容时,即使内容被隐藏,按钮和切换仍处于“打开状态”。这个问题可以在台式机或平板电脑中看到(因为它们会显示导航选项卡)。要在桌面上查看问题,只需在单击导航选项卡后减小视口大小即可。
我想,如果我可以使用“classList.contains()”以某种方式跟踪内容何时具有“show”类以及何时不具有,我就能够控制它。但是,我认为它只会在我提到内联类时才跟踪该类(它会持续对第一个内容元素发出 true 警报,对其余元素发出 false 警报)。如果我没有内联提到的类,即使 Bootstrap 在这些类之间内部切换,它也不会跟踪它。或者也许我以错误的方式使用 contains 函数。我不知道。
我还认为,也许如果我可以跟踪点击,即如果单击导航选项卡,然后如果单击手风琴,则应该从手风琴按钮中删除或添加类(“折叠”)。但这会扰乱切换正常工作的其他情况。
我也无法使用toggle() 来实现Bootstrap 手风琴的“折叠”或“显示”。
我什么也想不出来,所以我最后请求你帮助我。请帮我解决这个问题。
编辑: 所以,我已经设法让 .contains() 工作,但然后我需要添加一个递归函数来切换“折叠”类,这会使页面变慢并最终无响应。
这就是我所做的:
PS:如果toggle() 有效但不起作用,我就不必这样做。另外,我觉得我让它变得比需要的更复杂。我是走对了还是让它变得更复杂?
const btn1 = document.getElementById('btn-1');
const btn2 = document.getElementById('btn-2');
const btn3 = document.getElementById('btn-3');
const tab1 = document.getElementById('nl-1');
const tab2 = document.getElementById('nl-2');
const tab3 = document.getElementById('nl-3');
const content1 = document.getElementById('flush-collapseOne');
const content2 = document.getElementById('flush-collapseTwo');
const content3 = document.getElementById('flush-collapseThree');
// this function will add and remove the collapsed class from btn
function btn2Toggle() {
btn2.addEventListener('click', function() {
btn2.classList.add('collapsed');
btn2.addEventListener('click', function() {
btn2.classList.remove('collapsed');
if (btn2.onclick) {
btn2Toggle();
}
else {
return;
}
})
});
// or I could simply have this line of code if toggle() worked
// btn2.addEventListener('click', function() {
// btn2.classList.toggle('collapsed');
// })
}
function contentVisible() {
if (content1.classList.contains("show")) {
// alert('content 1 visible');
};
if (content2.classList.contains("show")) {
// alert('content 2 visible');
btn2Toggle();
};
if (content3.classList.contains("show")) {
// alert('content 3 visible');
};
}
function callTab() {
// if tab1 is clicked on desktop, show only the content associated with btn1, collapse the rest of them
if (tab1.addEventListener('click', function() {
btn2.classList.add('collapsed');
btn3.classList.add('collapsed');
btn1.classList.remove('collapsed');
}));
// if tab2 is clicked on desktop, show only the content associated with btn2, collapse the rest of them
if (tab2.addEventListener('click', function() {
btn1.classList.add('collapsed');
btn3.classList.add('collapsed');
btn2.classList.remove('collapsed');
// if navtab #2 (i.e. Link #2) is clicked and then if accordion
// button #2 (i.e. Link #2) is clicked then contentVisible()
// will be called
document.querySelectorAll('.accordion-button').addEventListener('click', contentVisible());
}));
// if tab3 is clicked on desktop, show only the content associated with btn3, collapse the rest of them
if (tab3.addEventListener('click', function() {
btn1.classList.add('collapsed');
btn2.classList.add('collapsed');
btn3.classList.remove('collapsed');
}));
};
function myFunction(x) {
if (x.matches) { // If media query matches
document.querySelectorAll('.nav-link').addEventListener('click', callTab());
}
}
var x = window.matchMedia("(min-width: 992px)")
myFunction(x) // Call listener function at run time
x.addListener(myFunction) // Attach listener function on state changes
.container .nav-tabs {
display: none;
}
/* MEDIA QUERY */
@media screen and (min-width: 992px) {
.container .nav-tabs {
display: flex;
}
.accordion-item h2 {
display: none;
}
.container .accordion-item {
border: none;
}
}
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Bootstrap demo</title>
<!-- Bootstrap CSS -->
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous">
</head>
<body>
<div class="container">
<ul class="nav nav-tabs">
<li class="nav-item">
<a class="nav-link active" id="nl-1" aria-current="page" href="#flush-collapseOne" data-bs-toggle="tab">Link #1</a>
</li>
<li class="nav-item">
<a class="nav-link" id="nl-2" href="#flush-collapseTwo" data-bs-toggle="tab">Link #2</a>
</li>
<li class="nav-item">
<a class="nav-link" id="nl-3" href="#flush-collapseThree" data-bs-toggle="tab">Link #3</a>
</li>
</ul>
<div class="accordion accordion-flush" id="accordionFlushExample">
<div class="accordion-item">
<h2 class="accordion-header">
<button id="btn-1" onclick="document.querySelector('#nl-1').click()" class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseOne" aria-expanded="false" aria-controls="flush-collapseOne">
Link #1
</button>
</h2>
<div id="flush-collapseOne" class="accordion-collapse collapse show" data-bs-parent="#accordionFlushExample">
<div class="accordion-body">content 1</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
<button id="btn-2" onclick="document.querySelector('#nl-2').click()" class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseTwo" aria-expanded="false" aria-controls="flush-collapseTwo">
Link #2
</button>
</h2>
<div id="flush-collapseTwo" class="accordion-collapse collapse" data-bs-parent="#accordionFlushExample">
<div class="accordion-body">content 2</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
<button id="btn-3" onclick="document.querySelector('#nl-3').click()" class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseThree" aria-expanded="false" aria-controls="flush-collapseThree">
Link #3
</button>
</h2>
<div id="flush-collapseThree" class="accordion-collapse collapse" data-bs-parent="#accordionFlushExample">
<div class="accordion-body">content 3</div>
</div>
</div>
</div>
</div>
<!-- Bootstrap JS -->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-geWF76RCwLtnZ8qwWowPQNguL3RmwHVBC9FhGdlKrxdiJJigb/j/68SIy3Te4Bkz" crossorigin="anonymous"></script>
</body>
</html>