如何使用 javascript 展开和折叠一个 < div > ？

小开

how about:

jQuery:

$('.majorpoints').click(function(){
$(this).find('.hider').toggle();
});

HTML

<div>
<fieldset class="majorpoints">
<legend class="majorpointslegend">Expand</legend>
<div class="hider" style="display:none" >
<ul>
<li>cccc</li>
<li></li>
</ul>
</div>
</div>

Fiddle

This way you are binding the click event to the .majorpoints class an you don't have to write it in the HTML each time.

小开

Many problems here

I've set up a fiddle that works for you: http://jsfiddle.net/w9kSU/

$('.majorpointslegend').click(function(){
if($(this).text()=='Expand'){
$('#mylist').show();
$(this).text('Colapse');
}else{
$('#mylist').hide();
$(this).text('Expand');
}
});

小开

Take a look at toggle() jQuery function :

http://api.jquery.com/toggle/

Also, innerHTML jQuery Function is .html().

小开

So, first of all, your Javascript isn't even using jQuery. There are a couple ways to do this. For example:

First way, using the jQuery toggle method:

<div class="expandContent">
<a href="#">Click Here to Display More Content</a>
</div>
<div class="showMe" style="display:none">
This content was hidden, but now shows up
</div>


<script>
$('.expandContent').click(function(){
$('.showMe').toggle();
});
</script>

jsFiddle: http://jsfiddle.net/pM3DF/

Another way is simply to use the jQuery show method:

<div class="expandContent">
<a href="#">Click Here to Display More Content</a>
</div>
<div class="showMe" style="display:none">
This content was hidden, but now shows up
</div>


<script>
$('.expandContent').click(function(){
$('.showMe').show();
});
</script>

jsFiddle: http://jsfiddle.net/Q2wfM/

Yet a third way is to use the slideToggle method of jQuery which allows for some effects. Such as $('#showMe').slideToggle('slow'); which will slowly display the hidden div.

小开

try jquery,

  <div>
<a href="#" class="majorpoints" onclick="majorpointsexpand(" + $('.majorpointslegend').html() + ")"/>
<legend class="majorpointslegend">Expand</legend>
<div id="data" style="display:none" >
<ul>
<li></li>
<li></li>
</ul>
</div>
</div>




function majorpointsexpand(expand)
{
if (expand == "Expand")
{
$('#data').css("display","inherit");
$(".majorpointslegend").html("Collapse");
}
else
{
$('#data').css("display","none");
$(".majorpointslegend").html("Expand");
}
}

小开

Since you have jQuery on the page, you can remove that onclick attribute and the majorpointsexpand function. Add the following script to the bottom of you page or, preferably, to an external .js file:

$(function(){


$('.majorpointslegend').click(function(){
$(this).next().toggle().text( $(this).is(':visible')?'Collapse':'Expand' );
});


});

This solutionshould work with your HTML as is but it isn't really a very robust answer. If you change your fieldset layout, it could break it. I'd suggest that you put a class attribute in that hidden div, like class="majorpointsdetail" and use this code instead:

$(function(){


$('.majorpoints').on('click', '.majorpointslegend', function(event){
$(event.currentTarget).find('.majorpointsdetail').toggle();
$(this).text( $(this).is(':visible')?'Collapse':'Expand' );
});


});

Obs: there's no closing </fieldset> tag in your question so I'm assuming the hidden div is inside the fieldset.

小开

最佳答案

Okay, so you've got two options here :

Use jQuery UI's accordion - its nice, easy and fast. See more info here
Or, if you still wanna do this by yourself, you could remove the fieldset (its not semantically right to use it for this anyway) and create a structure by yourself.

Here's how you do that. Create a HTML structure like this :

<div class="container">
<div class="header"><span>Expand</span>


</div>
<div class="content">
<ul>
<li>This is just some random content.</li>
<li>This is just some random content.</li>
<li>This is just some random content.</li>
<li>This is just some random content.</li>
</ul>
</div>
</div>

With this CSS: (This is to hide the .content stuff when the page loads.

.container .content {
display: none;
padding : 5px;
}

Then, using jQuery, write a click event for the header.

$(".header").click(function () {


$header = $(this);
//getting the next element
$content = $header.next();
//open up the content needed - toggle the slide- if visible, slide up, if not slidedown.
$content.slideToggle(500, function () {
//execute this after slideToggle is done
//change text of header based on visibility of content div
$header.text(function () {
//change text based on condition
return $content.is(":visible") ? "Collapse" : "Expand";
});
});


});

Here's a demo : http://jsfiddle.net/hungerpain/eK8X5/7/

小开

You might want to give a look at this simple Javascript method to be invoked when clicking on a link to make a panel/div expande or collapse.

<script language="javascript">
function toggle(elementId) {
var ele = document.getElementById(elementId);
if(ele.style.display == "block") {
ele.style.display = "none";
}
else {
ele.style.display = "block";
}
}
</script>

You can pass the div ID and it will toggle between display 'none' or 'block'.

Original source on snip2code - How to collapse a div in html

小开

Here there is my example of animation a staff list with expand a description.

<html>
<head>
<style>
.staff {            margin:10px 0;}
.staff-block{       float: left; width:48%; padding-left: 10px; padding-bottom: 10px;}
.staff-title{       font-family: Verdana, Tahoma, Arial, Serif; background-color: #1162c5; color: white; padding:4px; border: solid 1px #2e3d7a; border-top-left-radius:3px; border-top-right-radius: 6px; font-weight: bold;}
.staff-name {       font-family: Myriad Web Pro; font-size: 11pt; line-height:30px; padding: 0 10px;}
.staff-name:hover { background-color: silver !important; cursor: pointer;}
.staff-section {    display:inline-block; padding-left: 10px;}
.staff-desc {       font-family: Myriad Web Pro; height: 0px; padding: 3px; overflow:hidden; background-color:#def; display: block; border: solid 1px silver;}
.staff-desc p {     text-align: justify; margin-top: 5px;}
.staff-desc img {   margin: 5px 10px 5px 5px; float:left; height: 185px; }
</style>
</head>
<body>
<!-- START STAFF SECTION -->
<div class="staff">
<div class="staff-block">
<div  class="staff-title">Staff</div>
<div class="staff-section">
<div class="staff-name">Maria Beavis</div>
<div class="staff-desc">
<p><img src="http://www.craigmarlatt.com/canada/images/security&defence/coulombe.jpg" />Maria earned a Bachelor of Commerce degree from McGill University in 2006 with concentrations in Finance and International Business. She has completed her wealth Management Essentials course with the Canadian Securities Institute and has worked in the industry since 2007.</p>
</div>
<div class="staff-name">Diana Smitt</div>
<div class="staff-desc">
<p><img src="http://www.craigmarlatt.com/canada/images/security&defence/coulombe.jpg" />Diana joined the Diana Smitt Group to help contribute to its ongoing commitment to provide superior investement advice and exceptional service. She has a Bachelor of Commerce degree from the John Molson School of Business with a major in Finance and has been continuing her education by completing courses.</p>
</div>
<div class="staff-name">Mike Ford</div>
<div class="staff-desc">
<p><img src="http://www.craigmarlatt.com/canada/images/security&defence/coulombe.jpg" />Mike: A graduate of École des hautes études commerciales (HEC Montreal), Guillaume holds the Chartered Investment Management designation (CIM). After having been active in the financial services industry for 4 years at a leading competitor he joined the Mike Ford Group.</p>
</div>
</div>
</div>


<div class="staff-block">
<div  class="staff-title">Technical Advisors</div>
<div class="staff-section">
<div class="staff-name">TA Elvira Bett</div>
<div class="staff-desc">
<p><img src="http://www.craigmarlatt.com/canada/images/security&defence/coulombe.jpg" />Elvira has completed her wealth Management Essentials course with the Canadian Securities Institute and has worked in the industry since 2007. Laura works directly with Caroline Hild, aiding in revising client portfolios, maintaining investment objectives, and executing client trades.</p>
</div>
<div class="staff-name">TA Sonya Rosman</div>
<div class="staff-desc">
<p><img src="http://www.craigmarlatt.com/canada/images/security&defence/coulombe.jpg" />Sonya has a Bachelor of Commerce degree from the John Molson School of Business with a major in Finance and has been continuing her education by completing courses through the Canadian Securities Institute. She recently completed her Wealth Management Essentials course and became an Investment Associate.</p>
</div>
<div class="staff-name">TA Tim Herson</div>
<div class="staff-desc">
<p><img src="http://www.craigmarlatt.com/canada/images/security&defence/coulombe.jpg" />Tim joined his father&#8217;s group in order to continue advising affluent families in Quebec. He is currently President of the Mike Ford Professionals Association and a member of various other organisations.</p>
</div>
</div>
</div>
</div>
<!-- STOP STAFF SECTION -->


<script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>


<script language="javascript"><!--
//<![CDATA[
$('.staff-name').hover(function() {
$(this).toggleClass('hover');
});
var lastItem;
$('.staff-name').click(function(currentItem) {
var currentItem = $(this);
if ($(this).next().height() == 0) {
$(lastItem).css({'font-weight':'normal'});
$(lastItem).next().animate({height: '0px'},400,'swing');
$(this).css({'font-weight':'bold'});
$(this).next().animate({height: '300px',opacity: 1},400,'swing');
} else {
$(this).css({'font-weight':'normal'});
$(this).next().animate({height: '0px',opacity: 1},400,'swing');
}
lastItem = $(this);
});
//]]>
--></script>


</body></html>

Fiddle

小开

If you used the data-role collapsible e.g.

    <div id="selector" data-role="collapsible" data-collapsed="true">
html......
</div>

then it will close the the expanded div

    $("#selector").collapsible().collapsible("collapse");

小开

Check out Jed Foster's Readmore.js library.

It's usage is as simple as:

$(document).ready(function() {
$('article').readmore({collapsedHeight: 100});
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.0/jquery.min.js"></script>
<script src="https://fastcdn.org/Readmore.js/2.1.0/readmore.min.js" type="text/javascript"></script>


<article>
<p>From this distant vantage point, the Earth might not seem of any particular interest. But for us, it's different. Consider again that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar," every "supreme leader," every saint and sinner in the history of our species lived there – on a mote of dust suspended in a sunbeam.</p>


<p>Space, the final frontier. These are the voyages of the starship Enterprise. Its five year mission: to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before!</p>


<p>Here's how it is: Earth got used up, so we terraformed a whole new galaxy of Earths, some rich and flush with the new technologies, some not so much. Central Planets, them was formed the Alliance, waged war to bring everyone under their rule; a few idiots tried to fight it, among them myself. I'm Malcolm Reynolds, captain of Serenity. Got a good crew: fighters, pilot, mechanic. We even picked up a preacher, and a bona fide companion. There's a doctor, too, took his genius sister out of some Alliance camp, so they're keeping a low profile. You got a job, we can do it, don't much care what it is.</p>


<p>Space, the final frontier. These are the voyages of the starship Enterprise. Its five year mission: to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before!</p>
</article>

Here are the available options to configure your widget:

{
speed: 100,
collapsedHeight: 200,
heightMargin: 16,
moreLink: '<a href="#">Read More</a>',
lessLink: '<a href="#">Close</a>',
embedCSS: true,
blockCSS: 'display: block; width: 100%;',
startOpen: false,


// callbacks
blockProcessed: function() {},
beforeToggle: function() {},
afterToggle: function() {}
},

Use can use it like:

$('article').readmore({
collapsedHeight: 100,
moreLink: '<a href="#" class="you-can-also-add-classes-here">Continue reading...</a>',
});

I hope it helps.

小开

Using Pure Javascript

const collapsableBtn = document.querySelectorAll('.collapsable-toggle');


for (let index = 0; index < collapsableBtn.length; index++) {
collapsableBtn[index].addEventListener('click', function(e) {
// e.preventDefault();
e.stopImmediatePropagation();


iterateElement = this;


getCollapsableParent = iterateElement.parentElement;


if(getCollapsableParent.classList.contains('show')) {
getCollapsableParent.classList.remove('show')
iterateElement.innerText = iterateElement.getAttribute('data-onCloseText');


} else {
getCollapsableParent.classList.add('show');
iterateElement.innerText = iterateElement.getAttribute('data-onOpenText');
}
})
}

.collapsable-container #expand {
display:none;
}
.collapsable-container.show #expand {
display:block;
}

<div class="collapsable-container">
<a href="javascript:void(0);" class="collapsable-toggle" data-onOpenText="Hide First Content" data-onCloseText="Show First Content">Show First Content</a>
<div id="expand">
This is some Content
</div>
</div>
 

 

<div class="collapsable-container">
<a href="javascript:void(0);" class="collapsable-toggle" data-onOpenText="Hide Second Content" data-onCloseText="Show Second Content">Show Second Content</a>
<div id="expand">
This is some Content
</div>
</div>

小开

Pure javascript allowing only one expanded div at a time. It allows multi-level sub-expanders. The html only need the expanders contents. The javascript will create the expanders headers with the titles form the content data attribute and a svg arrow.

<style>
/* expanders headers divs */
.expanderHead {
color: white;
background-color: #1E9D8B;
border: 2px solid #1E9D8B;
margin-top: 9px;
border-radius: 6px;
padding: 3px;
padding-left: 9px;
cursor: default;
font-family: Verdana;
font-size: 14px;
}


.expanderHead:first-child {
margin-top: 0 !important;
}


.expanderBody:last-child {
margin-bottom: 0 !important;
}


/* expanders svg arrows */
.expanderHead svg > g > path {
fill: none;
stroke: white;
stroke-width: 2;
stroke-miterlimit: 5;
pointer-events: stroke;
}


/* expanders contents divs */
.expanderBody {
border: 2px solid #1E9D8B;
border-top: 0;
background-color: white;
border-top-left-radius: 0;
border-top-right-radius: 0;
border-bottom-left-radius: 6px;
border-bottom-right-radius: 6px;
padding: 6px;
font-family: Verdana;
font-size: 12px;
}


/* widget window */
.widget {
width: 400px;
background-color: white;
padding: 9px;
border: 2px solid #1E9D8B;
border-top-left-radius: 6px;
border-top-right-radius: 6px;
border-bottom-left-radius: 6px;
border-bottom-right-radius: 6px;
}


</style>

<div class="widget">


<div data-title="expander 1" class="expanderBody">
expander 1 content
</div>


<div data-title="expander 2" class="expanderBody">
expander 2 content
</div>


<div data-title="expander 3" class="expanderBody">


<div>
expander 3 content
</div>


<div data-title="expander 3.1" class="expanderBody">
expander 3.1 content
</div>


<div data-title="expander 3.2" class="expanderBody">
expander 3.2 content
</div>


<div data-title="expander 3.3" class="expanderBody">
expander 3.3 content
</div>


</div>


</div>






<script>
document.querySelectorAll(".expanderBody").forEach(item => {
if (item.dataset.title) {
// create expander header
let divHeader = document.createElement("div");
divHeader.className = "expanderHead";
divHeader.innerHTML = "<svg width='14px' height='8px' viewBox='0 0 12 6'><g><path d='M 5 5 L 10 1'/><path d='M 1 1 L 5 5'/></g></svg>&nbsp;<span>" + item.dataset.title + "</span>";
// expander click event
divHeader.addEventListener("click", function () {
// open / close expander
for (let i = 0; i < this.parentNode.children.length; i++) {
let expander = this.parentNode.children[i];
// check if it's expander header
if (expander.className == "expanderHead") {
if (expander == this && expander.nextElementSibling.style.display == "none") {
// open expander body
expander.nextElementSibling.style.display = "";
expander.innerHTML = "<svg width='14px' height='8px' viewBox='0 0 12 6'><g><path d='M 1 5 L 5 1'/><path d='M 5 1 L 10 5'/></g></svg>&nbsp;<span>" + expander.nextElementSibling.dataset.title + "</span>";
expander.style.borderBottomLeftRadius = "0";
expander.style.borderBottomRightRadius = "0";
}
else {
// close expander body
expander.nextElementSibling.style.display = "none";
expander.innerHTML = "<svg width='14px' height='8px' viewBox='0 0 12 6'><g><path d='M 5 5 L 10 1'/><path d='M 1 1 L 5 5'/></g></svg>&nbsp;<span>" + expander.nextElementSibling.dataset.title + "</span>";
expander.style.borderBottomLeftRadius = "6px";
expander.style.borderBottomRightRadius = "6px";
}
}
}
}, true);
item.parentNode.insertBefore(divHeader, item);
item.style.display = "none";
}
});
</script>