Develop Reference

jQuery plugin for repeating divs

How do I access, div with class name fire in this for a function or in general access nested div class?
//this doesn't seems to work
function lightCandle(){
$(".fire").show();
}
<div class="dom" id="dom" style="display: none">
<div class="happydiwali" id="happydiwali">
<div class="candle"></div>
<div id="match" class="match"> </div>
<div class="fire" id="fire"></div>
<div class="light"></div>
</div>
</div>

You're showing the .fire element but it's parent .dom element remains hidden because of the display:none.
Show the .dom element as well as .fire:
$(".fire").show().closest('.dom').show();

Make the parent to display: block, and to the child as well.
function lightCandle(){
var dom = $(".dom");
if(dom.css('display') == none){
dom.css('display', 'block');
dom.find('.fire').show();
}
//Or with out condition,
dom.css('display', 'block');
dom.find('.fire').show();
}

Working on DOM elements, finding next class

I have problem with working on DOM elements.
This is my HTML:
<div class="movie__feature">
▲
</div>
<div class="movie__images">
<span class="similarity_points">9</span>
<a href="http://www.filmypodobnedo.pl/Top-Gun/" title="Filmy podobne do Top Gun">
<img alt="Filmy podobne do Top Gun" src="http://www.filmypodobnedo.pl/photos/Top-Gun.jpg"/>
</a>
</div>
<div class="movie__feature">
▼
</div>
</div>
When I click on .plus class, I need to go to .similarity.
This is my jQuery:
$('.plus').click(function(e){
e.preventDefault();
var self = $(this);
self.closest('div').find('.similarity_points').text('10');
}
How my num should look?

The closest div doesn't contain .similarity_points as a descendent. You could use this:
self.closest('div').parent().find('.similarity_points').text('10');
But, be aware that code which is highly dependant on the structure of the DOM is also fragile.

In your code you are going up to .movie__feature, and then you are looking for children with the .similarity_points class.
You need to go up one more level and then look for the child element:
$('.plus').click(function () {
$(this).closest('div').parent().find('.similarity_points').text('10');
return false;
});

jQuery check divs has a class and unwrap if no other class

I have two div's and what I am trying to do is loop through all the divs to check if the div has a class jsn-bootstrap3, I'm also trying to check to see if the div has any other classes, if it doesn't then I'd like to remove the jsn-bootstrap3 div so that the child content is whats left.
<div class="jsn-bootstrap3">
<div class="wrapper">
Div one
</div>
</div>
<div class="jsn-bootstrap3 block">
<div class="wrapper">
Div two
</div>
</div>
$('div').each(function() {
if ($(this).hasClass()) {
console.log($(this));
var class_name = $(this).attr('jsn-bootstrap3');
console.log(class_name);
}
});
jsFiddle

You can try something like
$('div.jsn-bootstrap3').removeClass('jsn-bootstrap3').filter(function () {
return $.trim(this.className.replace('jsn-bootstrap3', '')) == ''
}).contents().unwrap();
Demo: Fiddle
use the class selector to find div's with class jsn-bootstrap3 because we are not goint to do anything with others
use filter() to filter out div's with any other class
use unwrap() with contents() to remove the wrapping 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.

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>