Develop Reference

Replacing and restoring div html with jquery

I have a couple of functions, the first replaces the contents of a div the second restores the original div. The problem is because I'm using the replaceWith method, the second div no longer exists if I try to call it a second time. Is there a better way to do this? I've experimented creating a variable that stores the contents of the second div so I can resuse it, but could not get it to work.
The code that I have is:
$(document).ready(function() {
$('#trigger_adults').click(function() {
var mainClone = $("#main-content").clone();
$('#main-content').fadeOut('fast', function() {
$('#main-content').replaceWith($('#adults'));
$('#slider-sec').slideUp('slow');
$('#adults').fadeIn('fast');
$(window).scrollTop(0);
});
$('#return').click(function() {
$("#adults").replaceWith(mainClone.clone());
$('#adults').fadeOut('fast');
$('#slider-sec').slideDown('slow');
});
});
});
Thanks in advance!

You could have both contents in the same div and toggle the visibility of their parent divs. Use javascript just to toggle the wrapper's class.
$('#toggle').click(function() {
$('#wrapper').toggleClass('init-state new-state');
});
#wrapper {
border:1px solid #d8d8d8;
}
.init-state #new,
.new-state #init { display:none; }
.inner {
padding:25px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.1/jquery.min.js"></script>
<div id="wrapper" class="init-state">
<div id="init" class="inner">Initial Content</div>
<div id="new" class="inner">New Content</div>
<button id="toggle" type="button">Toggle</button>
</div>

From the docs
The .fadeOut() method animates the opacity of the matched elements. Once the opacity reaches 0, the display style property is set to none, so the element no longer affects the layout of the page
you either need to manually set the display style property back to its original value, or call jQuery's .fadeIn() function which will do the opposite of .fadeOut()

Javascript - simplifying a bunch of long repetative hide/show functions

Things have gotten out of hand for me. What started off as the simplest solution has ballooned to the point where it is no longer manageable. I need to come up with a way to simplify a process.
Currently I have a map with pins denoting specific countries world-wide. As the mouse hovers over a pin, a hidden div appears. When you mouse over another one, the previous div disappears and a new one opens. I started with like 5 of these and it wasn't an issue but I keep getting requests for more and want to manage the script in a different way now.
$('#PH1').mouseenter(function () {
$('#BO2').hide();
$('#US2').hide();
$('#UK2').hide();
$('#CH2').hide();
$('#BZ2').hide();
$('#QC2').hide();
$('#OT2').hide();
$('#VA2').hide();
$('#RU2').hide();
$('#JT2').hide();
$('#HK2').hide();
$('#SH2').hide();
$('#BJ2').hide();
$('#XI2').hide();
$('#BE2').hide();
$('#AT2').hide();
$('#FR2').hide();
$('#MX2').hide();
$('#PH2').show();
});
$('#PH1').click(function (e) {
e.stopPropagation();
});
$('#mint').click(function () {
$('#PH2').hide();
});
In this instance div id #PH1 is the pin, when the mouse enters the div it hides all of the other div's #**2 and displays the one related to #PH1, which is #PH2
This list is repeated for each DIV. Every time I need to add a new DIV I need to make each existing list longer as well as create a new one. How can this process be made much simpler?

Thats not a right way to do this, you should use classes for this. But their is a wayaround for this all you need to is add a class add class ele1 to all #**1 and ele2 to all #**2:
then
$('.ele1').mouseenter(function () {
$(".ele2").hide();
var id = this.id;
var newId = id.substring(0,2)+"2";
$("#"+newId).show();
});

Make a loop:
var all= ['#BO2', '#US2', '#UK2', '#CH2', '#BZ2', '#QC2', '#OT2', '#VA2', '#RU2', '#JT2', '#HK2', '#SH2', '#BJ2', '#XI2' , '#BE2', '#AT2', '#FR2', '#MX2', '#PH2']
all.forEach(function (i){
$(i).hide();
});

Use a class selector on all of the DIVs you want to hide/show instead of an ID.
First, add a shared class to all DIVs so we target all of them by class.
HTML: class="hidden-divs"
jQuery: $('.hidden-divs').hide();
Then show the relevant DIV.
$('#PH2').show();
Using your first example, it would look like this:
$('#PH1').mouseenter(function () {
$('.hidden-divs').hide();
$('#PH2').show();
});

You can use jquery to hide multiple divs if you can select them. For example, suppose you have a common class ".map_divs" on all your divs, you could easily do:
$(".map_divs").hide();
On a side-note, you could solve all this on CSS, using :hover. For example:
.map_divs:hover {
display: block;
}

If you can edit the div's yourself (if it is not generated by a library) I would do it like this.
Add a common class to all your divs. Then on each div, add a data attribtue to the related id.
<div class="pin" id="PH1" data-rel="PH2"></div>
Then you can have a simple function like this:
$(".pin").mouseenter(function() {
var relatedId = $(this).data("rel");
$(".pin[id$='2']").hide(); // Hide all pins with id ending in 2
$("#" + relatedId).show() //show PH2
})

Using classes might be a better option here. You can then just attach the mouseenter event on document ready to all pins. This will work for an infinite number of pins too.
$('.pin').mouseenter(function () {
$('.popup').removeClass('show');
var id = this.id.split('_')[1];
$('#popup_' + id).addClass('show');
});
.pin {
width:30px;
height:30px;
margin-bottom:20px;
background-color:red;
}
.popup {
display:none;
width:100px;
height:100px;
margin-bottom:20px;
background-color:blue;
}
.popup.show {
display:block;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="pin_1" class="pin"></div>
<div id="popup_1" class="popup"></div>
<div id="pin_2" class="pin"></div>
<div id="popup_2" class="popup"></div>

If your div element is ordered like below, you can get the same result using css only, which will increase speed and overall experience (especially on phones and tablets).
When "hover" the yellow squares, the popup will be visibible even when "hover" the popup.
.pin {
width:30px;
height:30px;
margin-bottom:20px;
background-color:red;
}
.popup {
display:none;
width:100px;
height:100px;
margin-bottom:20px;
background-color:blue;
}
.pin:hover + .popup {
display:block;
}
.pin.type2 {
background-color:yellow;
}
.pin.type2:hover .popup {
display: inline-block;
margin-top: 30px;
}
<div id="pin_1" class="pin"></div>
<div id="popup_1" class="popup"></div>
<div id="pin_2" class="pin"></div>
<div id="popup_2" class="popup"></div>
<div id="pin_3" class="pin type2"><div id="popup_3" class="popup"></div></div>
<div id="pin_4" class="pin type2"><div id="popup_4" class="popup"></div></div>

jQuery show div only if has class

I have some problems with show/hide element. I have 2 popups on one page and I need hide one popup if another popup has class.
For example:
<body class="home">
<div class="popup main"></div>
<div class="popup"></div>
</body>
So, if body.home has .main I need to show only .main popup and hide or remove another .popup.
I'va tried
if ($('.home').find('.main')) {
$('.home').find('.main').show();
$('.home').find('.popup').remove();
}
But it does not working as I need, because in some reason I'll have code only with one popup block
<body class="home">
<div class="popup"></div>
</body>

Just try this,
if($(".popup").hasClass('main')){
$(".popup").hide();
$(".main").show();
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<body class="home">
<div class="popup main">main</div>
<div class="popup">another</div>
</body>

$( '.home .popup' ).not( ".main" ).remove();

You may want something like this:
$('.popup.main').length &&
$('.popup').show().not('.main').remove() ||
$('.popup').show();
JSFiddle
The above code is basically a "shortcut" of this:
// if there's a popup with class .main:
if($('.popup.main').length){
// show it:
$('.popup.main').show();
// and remove the one without class .main:
$('.popup').not('.main').remove();
// else, if there's no popup with class .main:
}else{
// show the .popup:
$('.popup').show();
}

If you want to show/hide element, use jQuery.hide() or jQuery.show(). If you use jQuery.remove() then u don't have chance to do it again because it was removed from DOM tree.

check with hasClass()
if ($('.home .popup').hasClass('main')) {
$('.home .popup').hide();
$('.home .main').show();
}
This will hide all popups, then show only that has .main class
Working pen
Edit
ok this in not working when .home has only one child.
Try solving this with css
.home .popup:not(.main) {
display: none;
}
.home .popup:only-child {
display: block !important;
}
with this code you only have to add/remove .main class to manage visibility
Working pen with css

jQuery binding events to elements with dynamic class

I have a trigger element and a responding element.
<div class="more"></div>
<div class="info"></div>
I would like to bind an open/close type event.
$('.more').delegate($('.more'), 'click', function(){
$(this).removeClass('more');
$(this).addClass('less');
$(this).text("less...");
$('.info').addClass("open");
});
$('.less').delegate($('.less'), 'click', function(){
$(this).addClass('more');
$(this).removeClass('less');
$(this).text("more...");
$('.info').removeClass("open");
});
It doesn't work as intended, if the second function is nested in the first then you can open and close only once.
If the script is formatted sensibly as above it will open but not close.
Could anyone help me out?
Bonus if the script could support the .info could be either a sibling or the element immediately following $(.more/.less)'s parent.
I've been toying with .on/.live/.bind but less successfully than above.

Use event delegation ,and binded to document or immediate parent,not same element
$(document).on( 'click',".more", function(){
$(this).removeClass('more');
$(this).addClass('less');
$(this).text("less...");
$('.info').addClass("open");
});
$(document).on('click',".less", function(){
$(this).addClass('more');
$(this).removeClass('less');
$(this).text("more...");
$('.info').removeClass("open");
});
DEMO
NOTE: delegate was outdated with latest version of jquery ,so use on instead,
ISSUE: you are delegated with same element $('.less'),$('.more') use immediate parent or document

Just use JavaScript to toggle a class, and let CSS magic do the rest. Here is a demo: http://jsfiddle.net/pomeh/69sX5/1/
And here is the code:
HTML
<div>
Some visible content
</div>
<div class="content-fold">
<div class="more">More...</div>
<div class="less">Less...</div>
</div>
<div class="info">Some hidden additional content</div>
CSS
/* Additional content and Less button hidden by default */
.content-fold + .info, .content-fold .less {
display: none;
}
/* Additional content and Less button shown when class shown is active */
.content-fold.shown + .info, .content-fold.shown .less {
display: block;
}
/* More button hidden when additional content is shown */
.content-fold.shown .more {
display: none;
}
/*
You can also move the "div.info" into the "div.content-fold",
and use ".content-fold.shown > .info" instead of ".content-fold.shown + .info"
Browser support is quite good for adjacent selector (see http://www.quirksmode.org/css/selectors/#t11 and https://developer.mozilla.org/en-US/docs/Web/CSS/Adjacent_sibling_selectors#Browser_compatibility)
*/
JavaScript
$('.content-fold').on('click', function(){
$(this).toggleClass('shown');
});

Use id to do your task. it's easy.
Html
<div class="more" id="toggle"></div>
<div class="info"></div>
Jquery
$('#toggle').click(function(){
var $this = $(this) //store object
if($this.hasClass('more')) {
$this.removeClass('more').addClass('less').text('Less...')
$this.next('.info').addClass('open');
} else {
$this.removeClass('less').addClass('more').text('More...')
$this.next('.info').removeClass('open');
}
});
js Fiddle: http://jsfiddle.net/5N6TL/53/

How to show the child div on mouse hover of parent div

I have a number of parent divs (.parent_div), which each contain a child div (.hotqcontent) where I output data from my database using a loop.
The following is my current markup:
<div class="content">
<div class="parent_div">
<div class="hotqcontent">
content of first div goes here...
</div>
<hr>
</div>
<div class="parent_div">
<div class="hotqcontent">
content of second div goes here...
</div>
<hr>
</div>
<div class="parent_div">
<div class="hotqcontent">
content of third div goes here...
</div>
<hr>
</div>
<div class="parent_div">
<div class="hotqcontent">
content of fourth div goes here...
</div>
<hr>
</div>
</div>
What I would like to achieve is when a user hovers / mouseovers a parent div, the contents of the child div contained within should be revealed.
To achieve this I wrote the following jQuery script but it doesn't appear to be working. It's not even showing the alert!
<script>
$(document).ready(function() {
$(function() {
$('.parent_div').hover(function() {
alert("hello");
$('.hotqcontent').toggle();
});
});
});
</script>
How can I modify or replace my existing code to achieve the desired output?

If you want pure CSS than you can do it like this....
In the CSS below, on initialization/page load, I am hiding child element using display: none; and then on hover of the parent element, say having a class parent_div, I use display: block; to unhide the element.
.hotqcontent {
display: none;
/* I assume you'll need display: none; on initialization */
}
.parent_div:hover .hotqcontent {
/* This selector will apply styles to hotqcontent when parent_div will be hovered */
display: block;
/* Other styles goes here */
}
Demo

Try this
$(document).ready(function() {
$('.parent_div').hover(function() {
alert("hello");
$(this).find('.hotqcontent').toggle();
});
});
Or
$(function() {
$('.parent_div').hover(function() {
alert("hello");
$(this).find('.hotqcontent').toggle();
});
});

You can use css for this,
.parent_div:hover .hotqcontent {display:block;}

This can be done with pure css (I've added a couple of bits in just to make it a bit neater for the JSFIDDLE):
.parent_div {
height: 50px;
background-color:#ff0000;
margin-top: 10px;
}
.parent_div .hotqcontent {
display: none;
}
.parent_div:hover .hotqcontent {
display:block;
}
This will ensure that your site still functions in the same way if users have Javascript disabled.
Demonstration:
http://jsfiddle.net/jezzipin/LDchj/

With .hotqcontent you are selecting every element with this class. But you want to select only the .hotqcontent element underneath the parent.
$('.hotqcontent', this).toggle();

$(document).ready(function(){
$('.parent_div').on('mouseover',function(){
$(this).children('.hotqcontent').show();
}).on('mouseout',function(){
$(this).children('.hotqcontent').hide();
});;
});
JSFIDDLE

you don't need document.ready function inside document.ready..
try this
$(function() { //<--this is shorthand for document.ready
$('.parent_div').hover(function() {
alert("hello");
$(this).find('.hotqcontent').toggle();
//or
$(this).children().toggle();
});
});
and yes your code will toggle all div with class hotqcontent..(which i think you don't need this) anyways if you want to toggle that particular div then use this reference to toggle that particular div
updated
you can use on delegated event for dynamically generated elements
$(function() { //<--this is shorthand for document.ready
$('.content').on('mouseenter','.parent_div',function() {
alert("hello");
$(this).find('.hotqcontent').toggle();
//or
$(this).children().toggle();
});
});

you can try this:
jQuery(document).ready(function() {
jQuery("div.hotqcontent").css('display','none');
jQuery("div.parent_div").each(function(){
jQuery(this).hover(function(){
jQuery(this).children("div.hotqcontent").show(200);
}, function(){
jQuery(this).children("div.hotqcontent").hide(200);
});
});
});