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JQuery. apply css to each element with a class using delay

I've just take a look on a lot of answer on stack but nothing seems can work on this.
I'me trying to apply a style to all element of a list li sequentially using delay. The script show just the last item of the list. What's the problem? thanks in advance for your help
$('ul li').each(function(i){
licont = this
setTimeout(function(){
$(licont).css('opacity','1')
},i * 10);
});
li{
opacity:0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
<li>ITEM 1</li>
<li>ITEM 2</li>
<li>ITEM 3</li>
<li>ITEM 4</li>
</ul>

You can pass the current element as a jQuery object as a parameter to setTimeout to reference current jQuery object within .each() when function passed to setTimeout is called
$('ul li').each(function(i) {
setTimeout(function(el) {
el.css('opacity', '1')
}, i * 1000, $(this));
});
li {
opacity: 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
<li>ITEM 1</li>
<li>ITEM 2</li>
<li>ITEM 3</li>
<li>ITEM 4</li>
</ul>

Jquery Nested Accordion to Show Only one Level

Suppose I have a following structure:
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3
<ul>
<li>Item11</li>
<li>Item12</li>
<li>Item13</li>
</ul>
</li>
This tree structure can have many levels.
Initially, I want to show following list:
Item 1
Item 2
Item 3 +
When I click on + list becomes
Item 3 -
Item 11
Item 12
Item 13
So, parent list disappears and sublist is shown.
If I click -, then everything is returned to the previous list.
Is there some jquery plugin for doing this?
Perhaps, some options in accordion?
Thanks in advance.

Used Dkouk his version to create what you need.
EDIT 1: Hide other menu items
EDIT 2: Second level menu
$(function () {
$('ul li').each(function () {
if ( $(this).find('ul').length > 0 ){
$(this).addClass('child');
}
});
$('ul li.child span').click(function() {
$(this).parent().toggleClass('open').find('ul').first().slideToggle();
$(this).parent().siblings().slideToggle();
});
});
ul {
list-style:none;
}
ul li.child span:after {
content:"+";
}
ul li.child.open span:after {
content:"-";
}
li ul { display:none; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<ul class="main">
<li>Item 1</li>
<li>Item 2</li>
<li>
<span>Item 3</span>
<ul>
<li>Item 1</li>
<li>
<span>Item 2</span>
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
</ul>
</li>
<li>Item 3</li>
</ul>
</li>
</ul>

You can add a class to your list when it's have a sublist, and toggle the list and toggle another class for parent of list so can change the '+' to '-'.
You can as many levels, and the code will work,
I've add a span to the list have child, but so can trigger the click only at text, if you trigger click for LI list and have sublist open then will close again.
You can style the content.
Here a simple example :
$(function () {
$('ul li').each(function () {
if ( $(this).find('ul').length > 0 ){
$(this).addClass('child');
}
});
$('ul li.child span').click(function() {
$(this).toggleClass('open').parent().find('ul:first').slideToggle();
$(this).parent().siblings().slideToggle();
});
});
ul {
list-style:none;
}
ul li.child span:after {
content:"+";
}
ul li.child span.open:after {
content:"-";
}
ul li ul { display:none; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>
<span>Item 3</span>
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>
<span>Item 3</span>
<ul>
<li>Item 1</li>
<li>Item 2</li>
</ul>
</li>
</ul>
</li>
</ul>

Having problems using $.each and wrapInner() in jQuery Mobile

I'm trying to iterate through a list of elements and wrap them in a link tag. However, my list displays differently than I want to.
Here is what it should look like: http://jsfiddle.net/eMexU/
HTML
<div id="list" data-role="listview">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
</div>
Here is what it looks like when I use $.each and wrapInner(): http://jsfiddle.net/zpFDa/1/
HTML
<div id="list" data-role="listview">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
</div>
JS
$("#list li").each(function () {
$(this).wrapInner('')
});

The only way to do this, is replacing existing li with new ones and then call .listview('refresh') to apply styles / enhance markup.
Demo
$("#list li").each(function () {
var text = $(this).text();
$(this).replaceWith('<li>' + text + '</li>')
});
$('#list').listview('refresh');

JQuery - How to move a li to another position in the ul? (exchange 2 li's)

What is a cool way to apply this? I need a script that exchange two < li>'s position in an < ul>.
It think that should be possible to achieve. Thanks for your response.
HTML
<div id="awesome">
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
</ul>
</div>
Pseudo Javascript (JQuery)
$("#awesome ul li:eq(1)").exchangePostionWith("#awesome ul li:eq(3)");
HTML Result
<div id="awesome">
<ul>
<li>Item 1</li>
<li>Item 4</li>
<li>Item 3</li>
<li>Item 2</li>
<li>Item 5</li>
</ul>
</div>

You can use jQuery's .after() for moving elements around. I cloned one of them so the original can remain as a placeholder. It's like if you wanted to switch variables a and b, you'd need a third temporary variable.
$.fn.exchangePositionWith = function(selector) {
var other = $(selector);
this.after(other.clone());
other.after(this).remove();
};
Now your pseudocode $("#awesome ul li:eq(1)").exchangePositionWith("#awesome ul li:eq(3)"); isn't so pseudo :-)

$("ul li a").click(function () {
$(this).parent().insertBefore('ul li:eq(0)');
});
<ul>
<li><a>a</a></li>
<li><a>b</a></li>
<li><a>c</a></li>
<li><a>d</a></li>
<li><a>e</a></li>
<li><a>f</a></li>
</ul>

Expand list with slideToggle

I have an unordered list like this one:
Show the rest
<ul id="myList">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
<li>Item 7</li>
<li>Item 8</li>
<li>Item 9</li>
<li>Item 10</li>
</ul>
and this jQuery code:
var list = $('#myList li:gt(4)');
list.hide();
$('a#myList-toggle').click(function() {
list.slideToggle(400);
return false;
});
The problem is that it slides each individual li item, i need to slide the rest of the list, like i would slide the whole list.
How can I do that?

your method didn't work because it would find the height with height: auto.
After a lot of fail and try, I came up with something that works, almost.
Do you have any comment on my code, I would really appreciate it.
And how would I do it, if I want the same link to collapse the list again
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
var list = $('ul#myList');
var original_height = list.height();
list.css({height:$('#myList li').height()*5});
$('a#myList-toggle').click(function() {
list.animate({height:original_height})
return false;
});
});
</script>
<style type="text/css">
ul#myList {
overflow: hidden;
}
</style>
</head>
<body>
Show the rest
<ul id="myList">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li>Item 4</li>
<li>Item 5</li>
<li>Item 6</li>
<li>Item 7</li>
<li>Item 8</li>
<li>Item 9</li>
<li>Item 10</li>
</ul>
</body>
</html>

Pretty clumsy solution IMHO, but if it works for you - it works for you...
For the list to collapse and expand by clicking on the same link:
$(document).ready(function() {
var list = $('ul#myList');
var original_height = list.height();
var new_height = $('#myList li').height()*5;
list.css({height:new_height});
$('a#myList-toggle').click(function() {
if( list.height() == original_height ) {
list.animate({height:new_height});
} else {
list.animate({height:original_height});
}
return false;
});
});

Quick & not-so-dirty way: wrap it with a div element and slideToggle('#myList div.wrapper').

You can give a height to UL tag with overflow:hidden. Then you use animation({height:auto}) to show all. Otherwise, you don't have any viable solution.

Whats the problem with simply toggeling the list instead of the elements?
$(function(){
var listheight = $("#mylist").height();
$("a#myList-toggle").toggle(function(){
$("#mylist").slideToggle();
},function(){$("#mylist").animate({height:listheight})});
});