Develop Reference

Showing a div on button click

I'm simply trying to toggle() <div class="reveal"> when the button is pushed.
I'll have multiple buttons and corresponding <div>'s on the page, so I just want to toggle() the next instance on the page using $(this).next("div.reveal").toggle();
Nothing happens and there are no errors. What did I do wrong?
HTML:
<article class="customerQuotes">
<blockquote>Blah
<cite><b>Name</b> - Company</cite>
</blockquote>
<button class="button right">More</button>
</article>
<div class="reveal">
<div class="right">
//stuff here
</div>
</div>
JS:
$(".button").click(function() {
$(this).next("div.reveal").toggle();
});
CSS:
.reveal{
display: none;
float: left;
clear: both;
}

You need to call .next on the parent element, since .reveal is its sibling.
$(".button").click(function() {
$(this).parent().next("div.reveal").toggle();
});

Thats because $(this).next("div.reveal") is undefined. There is no div.reveal next to a button element.
You would need to restructure your html like this:
<article class="customerQuotes">
<blockquote>Blah
<cite><b>Name</b> - Company</cite>
</blockquote>
<button class="button right">More</button>
<!-- Note here that div.reveal is sibling to a button so
.next() will find this element -->
<div class="reveal">
<div class="right">
//stuff here
</div>
</div>
</article>
or change your selector for JQuery to grab next reveal from the parent element like this:
$(".button").click(function() {
$(this).parent().next("div.reveal").toggle();
});

Like others said you forgot to use the next() method on the parent().
However, any time you change the structure of your HTML this code will break! Better reference the elements to be revealed explicitly. One simple way is to save the target as data on the button:
<button data-target="#reveal1" class="button right">More</button>
...
<div id="reveal1"></div>
Your JS would then look like this:
$(".button").click(function() {
$( $(this).data("target") ).toggle();
});
This will work regardless of where you place your button and div.

targeting a div in an ocean of nested dynamically added divs

I'm using the liferay framework and I need to add a JavaScript detected inline height to a very very specific div in my page. The problem is I need to target it going through an unknown number of dynamically added divs with dynamically added classes and IDs. To complicate this even further, the divs are randomly siblings or nested in each other.
Here's what it looks like:
<div class="known-class">
<div class="unknown dynamicallygenerated"></div>
<div class="unknown dynamicallygenerated">
<div class="unknown dynamicallygenerated">
<div class="unknown dynamicallygenerated"></div>
<div class="unknown dynamicallygenerated">
<div class="DIV-I-WANT-TO-TARGET">this is the div i need to Target with my css/javascript</div>
</div>
</div>
</div>
obviously I can't target it simply with
function resize() {
var heights = window.innerHeight;
jQuery('.DIV-I-WANT-TO-TARGET').css('height', heights + "px");
}
resize();
Because that class is present elsewhere, I would rather target it with something like.
jQuery('.known-class .DIV-I-WANT-TO-TARGET')
Which obviously doesn't work because there's a ton of other divs in the middle and my div is not a child of ".known-class"
I was asking myself if there was any jQuery that could help. Something like:
Catch any div with .DIV-I-WANT-TO-TARGET class that is "generically" inside another div that has .known-class
Is this possible? thanks a lot for your help!

Something like this would work:
// this will target the known-class and find all children with DIV-I-WANT-TO-TARGET
$('div.known-class').find('div.DIV-I-WANT-TO-TARGET');
// this will target the known-class and find the first DIV-I-WANT-TO-TARGET
$('div.known-class').find('div.DIV-I-WANT-TO-TARGET').first();
$('div.known-class').find('div.DIV-I-WANT-TO-TARGET:first');
$('div.known-class').find('div.DIV-I-WANT-TO-TARGET:eq(0)');
$('div.known-class').find('div.DIV-I-WANT-TO-TARGET').eq(0);

You can try in your css file
.known-class div div div div{}
The last div being the DIV-I-WANT-TO-TARGET

Assuming that you are adding the divs starting from the outer to the inner
Assign an equal name plus a number starting from 1
<div class="known-class">
<div class="unknown dynamicallygenerated" id="dynamicdiv1"></div>
<div class="unknown dynamicallygenerated" id="dynamicdiv2">
<div class="unknown dynamicallygenerated" id="dynamicdiv3">
<div class="unknown dynamicallygenerated" id="dynamicdiv4"></div>
<div class="unknown dynamicallygenerated" id="dynamicdiv5">
<div class="DIV-I-WANT-TO-TARGET" id="dynamicdiv6"></div>
</div>
</div>
</div>
The use jQuery [.each][1] to loop through all the divs on the document
$( document.body ).click(function() {
$( "div" ).each(function( i ) {
if ( this.style.color !== "blue" ) {
this.style.color = "blue";
} else {
this.style.color = "";
}
});
});
When you reach the last item in numeric order. (you can use any split function) add the attributes to that div

you need to select last div inside the known-class:
$('.known-class').find('div:last').css('background', 'Red')
OR if you want to select all the .known-class :
$('.known-class').each(function() {$(this).find('div:last').css('background', 'Red')});

Actually your selector works just fine:
$('.known-class .DIV-I-WANT-TO-TARGET')
With a space, selectors will find any descendant.
The search is only limited to direct descendants (immediate children) if you use the > operator.
So $('.known-class > .DIV-I-WANT-TO-TARGET') would not find what you wanted.

Duplicate DIV with input field

Basically I've managed to become stuck yet again trying to duplicate a DIV and it's form elements using jQuery.
Button:
<div class="addNew" id="addSkill">Add Skill <i class="icon-plus"></i></div>
Div and contents I wish to duplicate
<div class="row" id="skiller">
<div class="label">Skill</div>
<div class="input"><input class="lineput" placeholder="Doing stuff."></div>
</div>
I've tried using the clone method, I just can't seem to create a functioning line of code that will duplicate it beneath the first div, and make it ready for PHP multiple data entry.
Thanks!

Something like this would be a start:
$("#addSkill").click(function(e){
e.preventDefault();
var new_skiller = $("#skiller").clone();
new_skiller.attr("id", "skiller-"+$(".row").length);
new_skiller.insertAfter(".row:last");
});

You need to clone and then append() the item inside a div like so:
HTML
<div class="thing">
<div class="row" id="skiller">
<div class="label">Skill</div>
<div class="input"><input class="lineput" placeholder="Doing stuff."></div>
</div>
</div>
<div class="addNew" id="addSkill">Add Skill <i class="icon-plus"></i></div>
jQuery
$(document).ready(function(){
$('#addSkill').click(function(){
var thing = $('#skiller').clone();
$('.thing').append(thing);
});
});
View the jsFiddle Demo....
Note: you'll need to give them seperate names/make it an array to access

Try this. should work. Note: ID can not be duplicated. the following code will duplicate div with id as well.
$(document).ready(function(){
$('#addSkill').click(function(e) {
var skiller = $('#skiller').clone();
$( "#skiller" ).after( skiller );
});
});
Demo:
http://jsfiddle.net/XpN95/

Selecting a parent element (without using Jquery)

I just need to access the parent div where I have a button changing his siblings divs.
A code example can explain better:
<div class="parent"> <!-- This is structure repeats N times -->
<div class="divToToggleVisiblity divA">trololo A</div>
<div class="divToToggleVisiblity divB">trololo B</div>
<button onClick="toggleThem(this)">This button will toggle above divs</button>
</div>
function toggleThem(a){ // something like this, BUT without Jquery
$(a).closest(".parent").find(".divA").hide();
}

That's what parentNode is for:
a.parentNode.querySelectorAll('.divA');

function toggleThem(elem) {
elem.parentNode.getElementsByClassName('divA')[0].style.display = 'none';
}

Traversing DOM from span in / out of divs

I'm adding a click event to a span that is within a div. The target of this event, which will become visible, is a first div that is within a div, two divs down. How can I traverse the DOM to find it?
Perhaps it'll be clearer with the code:
<div a>
<h2>
<span id="here">Click</span>
</h2>
</div>
<div></div>
<div>
<div class="targetDiv">This is the div we need to find</div>
<div class="targetDiv">There are other divs with the same id, but we don't need to find those</div>
<div class="targetDiv">Not looking for this one </div>
<div class="targetDiv">Or this one either</div>
</div>
I've searched left and right and cannot find an answer. It's important to restrict the event ONLY to the first div immediately after the span.
Any help would be much appreciated.

As shown, the code would look like this:
$('span#here').on('click', function() {
$(this).closest('div').siblings(':contains(.targetDiv)').children().eq(0).show();
}

Here's a sample of the fish we caught
$(function() {
$('#here').on('click', function() {
var div = $(this) //the element clicked
.closest('div') //find nearest parent div
.nextAll(':eq(1)') //find the second next div
.children(':eq(0)') //find the first child of it
.show(); //remove invisible cloak
});
});​

This works. I provided an example you can just save to a html file and test it yourself
<style>
.targetDiv{display:none;}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
$('#here').click(function(){
$('.targetDiv').first().show(); // or whatever you want
});
});
</script>
<div a>
<h2>
<span id="here">Click</span>
</h2>
</div>
<div></div>
<div>
<div class="targetDiv">This is the div we need to find</div>
<div class="targetDiv">There are other divs with the same id, but we don't need to find those</div>
<div class="targetDiv">Not looking for this one </div>
<div class="targetDiv">Or this one either</div>
</div>