We Keep Coding

add class to next sibling element In Javascript

How could I add toggle class? When I click on anchor tag it should add class to only next sibling element ( .treeUlChild ). i tried a lot and try to find solution but couldn't. I am new and this is my first project in javascript.
here is my html code.
<div id="treeList" class="treeDiv">
<ul class="treeUl">
<li>
GUIDELINES
<ul class="treeUlChild treeLevel2">
<li> Guidlines 1</li>
<li> Guidlines 2</li>
<li> Guidlines 3</li>
<li> Guidlines 4</li>
</ul>
<!-- End Child Ul -->
</li>
<li>
AFTER-SALES
<ul id="test" class="treeUlChild treeLevel2">
<li>xyz</li>
<li>
def
<ul class="treeUlChild treeLevel3">
<li>
ASSETS
<ul class="treeLevel4">
<li>DIGITAL</li>
<li>OOH</li>
<li>POS</li>
<li>PRINT</li>
<li>SOCIAL GIF</li>
<li>SOCIAL VIDEOS</li>
</ul>
<!-- End Child Ul -->
</li>
</ul>
<!-- End Child Ul -->
</li>
</ul>
<!-- End Child Ul -->
</li>
</ul>
<!-- End treeUl -->
</div>
This is my javascript code.
document.querySelector('#treeList ul li a').addEventListener("click", function(){
document.querySelector('.treeUlChild').nextSibling.classList.toggle('done');
});

One issue is nextSibling returns a node object, it's better you use nextElementSibling which returns an element node. The other issue is querySelector will always return the first element with the specified selector, so the changes will always be reflected on the same element whichever link you clicked. You may rather use querySelectorAll which returns all the elements as a node list, and loop through each element and apply the changes. Another thing is, it's better to use event.target to get clicked element and rather than using a selector again.
document.querySelectorAll('#treeList ul li a').forEach(elem => elem.addEventListener("click", function(){
event.target.nextElementSibling.classList.toggle('done');
}));

There is very simple way using Bootstrap by the way.
But if you want to do that with pure Javascript, you're on the right way to it.
So first, transform your query selector into a object e.g:
var el = document.querySelector('#treeList ul li a');
forEach method, querying the single object clicked in the array of multiple objects:
el.forEach(yourFunctionName());
Add functions to your elements:
<li><a onclick="yourFunctionName()" href="#"> Guidlines 1</a></li>
<li><a onclick="yourFunctionName()" href="#"> Guidlines 2</a></li>
<li><a onclick="yourFunctionName()" href="#"> Guidlines 3</a></li>
<li><a onclick="yourFunctionName()" href="#"> Guidlines 4</a></li>
ps: you can simplify this.
Structure your function:
function myFunctionName(){
document.querySelector('.treeUlChild').nextSibling.classList.toggle('done');
}

Finding what child the nested ul is based on link clicked inside it

I have a setup like this
<ul>
<li> link
<ul>
<li> link
<ul> ... etc
</ul>
</li>
</ul>
So several nested uls, I need to figure out some way to find what level of nesting the ul has based on link that was clicked inside it, is it a top (1st) middle (2nd) etc.. one

If you have clicked element <li> (in your event handler) you can just count all parent <ul> elements
element.parents('ul').length

You can use
$("a").click(function(){
alert($(this).parents("ul").length);
});
Fiddle

Cufon (jQuery?) selector not to select children

I have a very basic and usual list menu with a submenu:
<ul>
<li>Home</li>
<li>
About
<ul id="sub-menu">
<li>Child1</li>
<li>Child2</li>
</ul>
</li>
</ul>
And then I have a Cufon selector applying a font to the menu:
Cufon.replace('ul li a');
Is there any way to select only the first level of the menu and disregard the other? Right now both levels get the font, but I would like to use something else for submenu.
I am very much a beginner with Javascript, Cufon and jQuery, I tried using child selectors but I had no luck with that. How can I achieve this?

It appears that your JavaScript library uses CSS-style selectors; you can just use
<ul class='containingMenu'>
<li>Home</li>
<li>
About
<ul id="sub-menu">
<li>Child1</li>
<li>Child2</li>
</ul>
</li>
</ul>
with this selector
ul.containingMenu > li > a
where the > causes the selector to apply only to a's that are direct children of li's that are direct children of the ul.containingMenu.
↪ See this example in action at JSFiddle.

How to extract certain <a> elements out of a div container?

I'm on a project that requires me to extract certain <a> elements (can be in Object type) from a div container. By using JavaScript, I'm able to get all <a> objects from the div. But the problem is, I only want the objects in the "first level" of <ul>, not the ones contained in another <ul> within one of its <li>.
For example, in the code below, I only want AAA, BBB, CCC, DDD. Not CCC-sub1 nor CCC-sub2. How do I achieve this via javascript/jquery?
Help is highly appreciated! Thanks.
<div id="sampleList">
<ul>
<li>
AAA
</li>
<li>
BBB
</li>
<li>
CCC
<ul>
<li>
CCC-Sub1
</li>
<li>
CCC-Sub2
</li>
</ul>
</li>
</li>
DDD
</li>
</ul>
</div>

Since you tagged this jQuery:
$('#sampleList > ul > li > a');

Code:
$(function(){
var links = $('#samplelist>ul>li>a').map(function(){
return $(this).text();
}).get();
alert(links);
});
Try it.

Finding previous and next li with Javascript

I have an uncertain amount of nested ul and li tags like:
<ul>
<li>5
<ul>
<li>2
<ul>
<li>1
</li>
<li>4
<ul>
<li>3
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li>7
<ul>
<li>9
<ul>
<li>14
<li>
</ul>
<li>11
</li>
</ul>
</li>
</ul>
I'm using Kendo ui treeview and it returns me the element where the l was dropped (it might be a element inside the li because I have some spans in each one).
What I need is to know the previous and next li through DOM and Javascript to save the new order of elements.
Can anyone help please?

You didn't specify which event you were using, but it should be "dragend". That way you should be able to detect the parent li and then just get all of it's children to reorder.
Check out this fiddle here. Is this closer to what you are looking for?
http://jsfiddle.net/burkeholland/CrRUz/

Using jQuery:
var parentLi = $(e).closest('li');
var previousLi = parentLi.prev()
var nextLi = parentLi.next();
Where e is the element receiving the drop.