折叠手风琴式菜单

Question

我在www.keokuk.com上有这个简单的可折叠菜单我希望在您单击下一个菜单时关闭上一个菜单。

这是javascript：

<script>
var coll = document.getElementsByClassName("collapsible");
var i;
for (i = 0; i < coll.length; i++) {
coll[i].addEventListener("click", function () {
this.classList.toggle("active");
var content = this.nextElementSibling;
if (content.style.maxHeight) {
content.style.maxHeight = null;
} else {
content.style.maxHeight = content.scrollHeight + "px";
}
});
}
</script>

Answer 1

我在您的网站上开发了一个解决方案。

但您似乎在另一个javascript函数中手动设置了最大高度，这样您就可以在注释行中执行同样的操作。

document.querySelectorAll('.collapsible').forEach(el => {
el.addEventListener('click', (e) => {
document.querySelectorAll('.collapsible').forEach(e => {
e.classList.remove('active');
e.nextSibling.nextElementSibling.style.maxHeight = "0px";
});
e.target.classList.toggle('active');
e.target.nextSibling.nextElementSibling.style.maxHeight =
`${el.nextSibling.nextElementSibling.scrollHeight}px`;
});
});

Answer 2

示例中对详细信息进行了注释

// Collect all .switch into an array
const switches = [...document.querySelectorAll(".switch")];
// Bind each .switch to the click event
switches.forEach(s => s.addEventListener("click", openClose));
// Event handler passes Event Object as default
function openClose(event) {
// Reference the tag proceeding clicked tag
const content = this.nextElementSibling;
// Get the height of content
let maxHt = content.scrollHeight + 'px';
// Find the index position of clicked tag
let index = switches.indexOf(this);
// The clicked tag will toggle .active class
this.classList.toggle('active');
// Remove .active class from all .switch
switches.forEach((btn, idx) => {
/*
If current index does NOT equal index of 
clicked tag...
...remove .active 
*/
if (idx != index) {
btn.classList.remove('active');
}
});
/*
If clicked has .active class...
...set style property of max-height using CSS variables
*/
if (this.classList.contains('active')) {
content.style.setProperty('--maxH', maxHt + 'px');
} else {
content.style.setProperty('--maxH', '0px');
}
}

*,
*::before,
*::after {
margin: 0;
padding: 0;
box-sizing: border-box
}
:root {
font: 300 1.5ch/1.2 'Segoe UI';
--maxH: 0px;
}
body {
width: 100%;
min-height: 200%;
padding: 15px;
}
header {
width: max-content;
margin: 10px 0 0;
padding: 5px 10px;
border: 3px ridge black;
border-radius: 4px;
background: #aaa;
cursor: pointer;
}
section {
position: relative;
max-height: var(--maxH);
margin: 0;
padding: 5px 10px;
border: 3px ridge black;
border-radius: 4px;
background: #ddd;
opacity: 0;
pointer-events: none;
}
.active+section {
z-index: 1;
opacity: 1.0;
}

<header class='switch'>Read more...</header>
<section>
<p>Merchandise Morty, your only purpose in life is to buy &amp; consume merchandise and you did it, you went into a store an actual honest to god store and you bought something, you didn't ask questions or raise ethical complaints you just looked into
the bleeding jaws of capitalism and said 'yes daddy please' and I'm so proud of you, I only wish you could have bought more, I love buying things so much Morty. Morty, you know outer space is up right? Are you kidding? I'm hoping I can get to both
of them, Rick! And there's no evidence that a Latino student did it.</p>
</section>
<header class='switch'>Read more...</header>
<section>
<p>Oh, I'm sorry Morty, are you the scientist or are you the kid who wanted to get laid? Why don't you ask the smartest people in the universe, Jerry? Oh yeah you can't. They blew up. Looossseeerrrrr. I am not putting my father in a home! He just came
back into my life, and you want to, grab him and, stuff him under a mattress like last month's Victoria's Secret?!
</p>
</section>