Floated elements jump when hiding another floated elements

Floated elements jump when hiding another floated elements - javascript

I have grid of floated elements, for which I created a filter. I want this filter to hide and show the items and while doing so I want the items to re adjust with transitions and fades.. At the moment the items just jump around.
As you can see here:
JSFIDDLE
How can I make the items slide to their position?
Heres the code:
HTML
<ul class="filters">
<li data="1">filter 1</li>
<li data="2">filter 2</li>
<li data="3">filter 3</li>
<li data="4">filter 4</li>
</ul>
<br>
<ul class="items">
<li data="1">1</li>
<li data="2">2</li>
<li data="1">3</li>
<li data="3">4</li>
<li data="4">5</li>
<li data="2">6</li>
<li data="3">7</li>
<li data="4">8</li>
</ul>
CSS
ul {
list-style: none;
padding: 0;
}
.filters li {
float:left;
margin-right: 10px;
cursor: pointer;
}
.items li {
width: 100px;
height: 100px;
background: #ccc;
float: left;
margin: 20px;
}
JQUERY
$(document).ready( function() {
$('.filters li').click( function () {
var data;
data = $(this).attr('data');
$('.items li').each( function() {
if($(this).attr('data') !== data) {
$(this).fadeOut();
}
else {
$(this).fadeIn();
}
});
});
});

As I mentioned in the comments you would need a different operation than fadeIn/Out as that involves the display property and that cannot be animated or transitioned.
Animating non-display values seems more optimal.
Something like this:
$(document).ready(function() {
$('.filters li').click(function() {
var data;
data = $(this).attr('data');
$('.items li').each(function() {
if ($(this).attr('data') !== data) {
$(this).addClass('hidden');
} else {
$(this).removeClass('hidden');
}
});
});
});
ul {
list-style: none;
padding: 0;
}
.filters li {
float: left;
margin-right: 10px;
cursor: pointer;
}
.items li {
width: 100px;
height: 100px;
background: #ccc;
float: left;
margin: 20px;
transition: all .5s ease;
}
li.hidden {
height: 0;
width: 0;
margin: 0;
opacity: 0;
font-size: 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class="filters">
<li data="1">filter 1</li>
<li data="2">filter 2</li>
<li data="3">filter 3</li>
<li data="4">filter 4</li>
</ul>
<br>
<ul class="items">
<li data="1">1</li>
<li data="2">2</li>
<li data="1">3</li>
<li data="3">4</li>
<li data="4">5</li>
<li data="2">6</li>
<li data="3">7</li>
<li data="4">8</li>
</ul>

You could set a delay for the fade in to ensure the fade out has completed.
The 500ms delay below is is a slightly longer duration as the fade in.
$(document).ready(function() {
$('.filters li').click(function() {
var data;
data = $(this).attr('data');
$('.items li').each(function() {
if ($(this).attr('data') !== data) {
$(this).fadeOut();
} else {
$(this).delay(525).fadeIn();
}
});
});
});
ul {
list-style: none;
padding: 0;
}
.filters li {
float: left;
margin-right: 10px;
cursor: pointer;
}
.items li {
width: 100px;
height: 100px;
background: #ccc;
float: left;
margin: 20px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class="filters">
<li data="1">filter 1</li>
<li data="2">filter 2</li>
<li data="3">filter 3</li>
<li data="4">filter 4</li>
</ul>
<br>
<ul class="items">
<li data="1">1</li>
<li data="2">2</li>
<li data="1">3</li>
<li data="3">4</li>
<li data="4">5</li>
<li data="2">6</li>
<li data="3">7</li>
<li data="4">8</li>
</ul>

It's the overlap of fadeOut and fadeIn that makes it look like they are jumping.
Try hiding the filtered out items quick and slideDown the applicable boxes:
$(document).ready( function() {
$('.filters li').click( function () {
var data;
data = $(this).attr('data');
$('.items li').each( function() {
if($(this).attr('data') !== data) {
$(this).slideUp();
}
else {
$(this).delay(525).slideDown();
}
});
});
});

Related

dropdown menu not opening and closing correctly

I have gotten it to open and close when hovering over the nav link but how do I keep it open so I can access the content on the menu? I need it to work exactly how a dropdown menu works.
This is what I have done so far I also need the html layout to stay the same.
$('.nav-link--dropdown').mouseover(function() {
$('.dropdown-menu').css('display', 'block');
});
$('.nav-link--dropdown').mouseleave(function() {
$('.dropdown-menu').css('display', 'none');
});
ul {
list-style: none;
padding: 0px;
display: flex;
}
li {
margin-right: 10px;
}
.dropdown-menu {
display: none;
}
.dropdown-menu ul {
display: block;
background-color: grey;
color: white;
padding: 10px;
text-align: center;
width: 200px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="nav">
<ul>
<li class="nav-link">home</li>
<li class="nav-link--dropdown">dropdown</li>
</ul>
</div>
<div class="dropdown-menu">
<ul>
<li class="dropdown-menu__link">random text</li>
<li class="dropdown-menu__link">random text</li>
<li class="dropdown-menu__link">random text</li>
</ul>
</div>
View on jsFiddle

Should remove margin use padding for that, if not when we enter that margin area mouse leave event will trigger.
$('.nav-link--dropdown').mouseover(function () {
$('.dropdown-menu').css('display', 'block');
});
$('.dropdown-menu').mouseover(function () {
$('.dropdown-menu').css('display', 'block');
});
$('.nav-link--dropdown').mouseleave(function () {
$('.dropdown-menu').css('display', 'none');
});
$('.dropdown-menu').mouseleave(function () {
$('.dropdown-menu').css('display', 'none');
});
* {
box-sizing: border-box;
margin: 0;
padding: 0;
}
ul {
list-style: none;
padding: 0px;
display: flex;
}
li {
padding: 10px;
}
.dropdown-menu {
display: none;
}
.dropdown-menu ul {
display: block;
background-color: grey;
color: white;
padding: 10px;
text-align: center;
width: 200px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<div class="nav">
<ul>
<li class="nav-link">home</li>
<li class="nav-link--dropdown">dropdown</li>
</ul>
</div>
<div class="dropdown-menu">
<ul>
<li class="dropdown-menu__link">random text</li>
<li class="dropdown-menu__link">random text</li>
<li class="dropdown-menu__link">random text</li>
</ul>
</div>

The problem you have here is that you leave the nav-link--dropdown when you move to your dropdown-menu. The simple solution: Include your dropdown-menu in your nav item.
$('.nav-link--dropdown').mouseover(function() {
$('.dropdown-menu').css('display', 'block');
});
$('.nav-link--dropdown').mouseleave(function() {
$('.dropdown-menu').css('display', 'none');
});
ul {
list-style: none;
padding: 0px;
display: flex;
}
li {
margin-right: 10px;
}
.dropdown-menu {
display: none;
}
.dropdown-menu ul {
display: block;
background-color: grey;
color: white;
padding: 10px;
text-align: center;
width: 200px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="nav">
<ul>
<li class="nav-link">home</li>
<li class="nav-link--dropdown">
dropdown
<div class="dropdown-menu">
<ul>
<li class="dropdown-menu__link">random text</li>
<li class="dropdown-menu__link">random text</li>
<li class="dropdown-menu__link">random text</li>
</ul>
</div>
</li>
</ul>
</div>

You can achieve this by bundling the menu item you want to hover over and it's dropdown in the same div.
<div class="nav">
<ul>
<li class="nav-link">home</li>
<div class="innerNav">
<li class="nav-link--dropdown">dropdown</li>
<div class="dropdown-menu">
<ul>
<li class="dropdown-menu__link">random text</li>
<li class="dropdown-menu__link">random text</li>
<li class="dropdown-menu__link">random text</li>
</ul>
</div>
</div>
</ul>
</div>
And:
$('.innerNav').mouseover(function () {
$('.dropdown-menu').css('display', 'block');
});
$('.innerNav').mouseleave(function () {
$('.dropdown-menu').css('display', 'none');
});
See this JSFiddle: https://jsfiddle.net/rmdfqh6c/

Since your problem is the mouseleave event will trigger when you try to move the mouse to the bellow dropdown menu, if you really must keep the elements separated, add the dropdown-menu to the class that keeps the display:block
$('.nav-link--dropdown, .dropdown-menu').mouseover(function () {
$('.dropdown-menu').css('display', 'block');
});
$('.nav-link--dropdown, .dropdown-menu').mouseleave(function () {
$('.dropdown-menu').css('display', 'none');
});
And remove margin/padding from menu items. Use line-height instead if you want some spacing:
.nav ul li {
line-height: 40px;
}
ul {
list-style: none;
margin: 0; // <--- I changed this from padding: 0px;
display: flex;
}
Otherwise the other suggested solutions to include the dropdown within you parent <ul> element is the best.
JSFiddle

Rotate the arrow as menu is expanded instead of doing at the end of the animation

As soon as I click the menu is expanded and then arrow is rotated. What I want is as soon as I click, menu should expand and arrow should rotate in parallel. How can I achieve that?
$(document).ready(function() {
$(".r-product-page #menu > li > a").click(function() {
$('ul.sub-menu').not($(this).siblings()).slideUp("slow").parents('.product-menu').removeClass('active');
$(this).siblings("ul.sub-menu").slideToggle("slow", function() {
if ($(this).parents('.product-menu').hasClass('active')) {
$(this).parents('.product-menu').removeClass('active')
} else $(this).parents('.product-menu').addClass('active');
});
});
$(".r-product-page #menu #one").click(function() {
$(".product-container").load("productOne.html");
})
});
.r-product-page {
width: 100%;
height: 100%;
display: flex;
flex-direction: row;
}
.r-product-page #menu {
height: 100%;
width: 300px;
}
.r-product-page #menu .product-menu {
color: #4d4d49;
font-size: 18px;
}
.r-product-page #menu .product-menu .sub-menu {
display: none;
}
.r-product-page #menu .product-menu .sub-menu li {
color: #898989;
font-family: 18px;
}
ul {
list-style: none;
}
.product-menu .dropdown-arrow {
transition: transform .2s;
}
.product-menu.active .dropdown-arrow {
transform: rotate(180deg)
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="r-product-page container">
<ul style="margin-top:5rem;" id="menu">
<li class="product-menu"><img class="dropdown-arrow" src="https://s1.postimg.org/211j5w7oqn/products_dropdown_arrow.png" alt="New york">
template A
<ul class="sub-menu">
<li>x</li>
<li>y</li>
<li>z</li>
<li>l</li>
<li>m</li>
<li>n</li>
</ul>
</li>
<li class="product-menu"><img class="dropdown-arrow" src="https://s1.postimg.org/211j5w7oqn/products_dropdown_arrow.png" alt="New york">
Template B
<ul class="sub-menu">
<li>3.1
</li>
</ul>
</li>
<li class="product-menu" id="one">Template C
</li>
<li class="product-menu">Template D
</li>
<li class="product-menu">Template E
</li>
<li class="product-menu">Template F
</li>
</ul>
<div class="product-container" />
</div>

The issue is because you're toggling the class in the callback of the animation, so it happens when the animation ends. Simply move that logic in to the outer click event handler.
Also note that you can simplify the whole if condition by just calling toggleClass(). Try this:
$(document).ready(function() {
$(".r-product-page #menu > li > a").click(function() {
var $a = $(this);
$('ul.sub-menu').not($a.siblings()).slideUp("slow").closest('.product-menu').removeClass('active');
$a.closest('.product-menu').toggleClass('active');
$a.siblings("ul.sub-menu").slideToggle("slow");
});
$(".r-product-page #menu #one").click(function() {
$(".product-container").load("productOne.html");
})
});
.r-product-page {
width: 100%;
height: 100%;
display: flex;
flex-direction: row;
}
.r-product-page #menu {
height: 100%;
width: 300px;
}
.r-product-page #menu .product-menu {
color: #4d4d49;
font-size: 18px;
}
.r-product-page #menu .product-menu .sub-menu {
display: none;
}
.r-product-page #menu .product-menu .sub-menu li {
color: #898989;
font-family: 18px;
}
ul {
list-style: none;
}
.product-menu .dropdown-arrow {
transition: transform .2s;
}
.product-menu.active .dropdown-arrow {
transform: rotate(180deg)
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="r-product-page container">
<ul style="margin-top:5rem;" id="menu">
<li class="product-menu"><img class="dropdown-arrow" src="https://s1.postimg.org/211j5w7oqn/products_dropdown_arrow.png" alt="New york">
template A
<ul class="sub-menu">
<li>x</li>
<li>y</li>
<li>z</li>
<li>l</li>
<li>m</li>
<li>n</li>
</ul>
</li>
<li class="product-menu"><img class="dropdown-arrow" src="https://s1.postimg.org/211j5w7oqn/products_dropdown_arrow.png" alt="New york">
Template B
<ul class="sub-menu">
<li>3.1</li>
</ul>
</li>
<li class="product-menu" id="one">Template C</li>
<li class="product-menu">Template D</li>
<li class="product-menu">Template E</li>
<li class="product-menu">Template F</li>
</ul>
<div class="product-container" />
</div>

Is there a cleaner way to write JS to show and hide?

Hi I have a fiddle setup here that has 2 list items and when clicked they display by toggle a show/hide div - each with different content.
My worry is the way I have written the JS to control it. Is there a better way to do this?
Thanks
https://jsfiddle.net/b0xamuj8/
html:
<ul>
<li class="revealerone">item 1</li>
<li class="revealertwo">item 2</li>
</ul>
<div class="revealed one">this is some content one</div>
<div class="revealed two">this is some content two</div>
css:
ul {
list-style-type: mome;
margin: 0;
}
li {
display: inline-block;
margin: 0 10px;
}
.revealed {
display: none;
background: green;
}
JS:
$(document).ready(function() {
$(".revealerone").click(function() {
$(".one").slideToggle("slow");
});
});
$(document).ready(function() {
$(".revealertwo").click(function() {
$(".two").slideToggle("slow");
});
});

You could use a data attribute to determine which "revealer" goes with which "revealed":
$(document).ready(function() {
$(".revealer").click(function() {
var id = "#" + $(this).data('item');
$(id).slideToggle("slow");
});
});
ul { list-style-type: none; margin: 0; }
li { display: inline-block; margin: 0 10px; }
.revealed { display: none; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
<li class="revealer" data-item="one">item 1</li>
<li class="revealer" data-item="two">item 2</li>
</ul>
<div class="revealed" id="one">this is some content one</div>
<div class="revealed" id="two">this is some content two</div>

You can store the target of the "revealer" in a data attribute and make your toggle code reusable like this:
HTML
<li class="revealer" data-target=".one">item 1</li>
<li class="revealer" data-target=".two">item 2</li>
JavaScript
$(".revealer").click(function() {
var target = $(this).data("target");
$(target).slideToggle("slow");
});
Demo: https://jsfiddle.net/alan0xd7/b0xamuj8/2/

In your case if HTML markup is consistent, you could use the index:
$(document).ready(function() {
$(".revealer").click(function() {
$(".revealed").eq($(this).index()).slideToggle("slow");
});
});
ul {
list-style-type: mome;
margin: 0;
}
li {
display: inline-block;
margin: 0 10px;
}
.revealed {
display: none;
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<ul>
<li class="revealer">item 1</li>
<li class="revealer">item 2</li>
</ul>
<div class="revealed">this is some content one</div>
<div class="revealed">this is some content two</div>

HTML:
<ul>
<li data-content-id="one" class="revealer">item 1</li>
<li data-content-id="two" class="revealer">item 2</li>
</ul>
<div class="revealed one">this is some content one</div>
<div class="revealed two">this is some content two</div>
JS:
$(document).ready(function() {
$(".revealer").click(function() {
var contentId = $(this).data("content-id");
$(".revealed." + contentId).slideToggle("slow");
});
});

Responsive drop downs not activating until resize

So I have tried to setup a responsive menu using the code here
http://webdesigntutsplus.s3.amazonaws.com/tuts/378_tessa/tessa-lt-dropdowns-21c7868/index.html
The problem I'm having is that the js seems to only activate when I resize the browser otherwise the larger version does not show the sub menu li when hovering and the smaller version has the li showing without clicking them first.
JS
var ww = '100%';
$(document).ready(function() {
$(".nav li a").each(function() {
if ($(this).next().length > 0) {
$(this).addClass("parent");
};
})
$(".toggleMenu").click(function(e) {
e.preventDefault();
$(this).toggleClass("active");
$(".nav").toggle();
});
adjustMenu();
})
$(window).bind('resize orientationchange', function() {
ww = document.body.clientWidth;
adjustMenu();
});
var adjustMenu = function() {
if (ww < 768) {
$(".toggleMenu").css("display", "inline-block");
if (!$(".toggleMenu").hasClass("active")) {
$(".nav").hide();
} else {
$(".nav").show();
}
$(".nav li").unbind('mouseenter mouseleave');
$(".nav li a.parent").unbind('click').bind('click', function(e) {
// must be attached to anchor element to prevent bubbling
e.preventDefault();
$(this).parent("li").toggleClass("hover");
});
}
else if (ww >= 768) {
$(".toggleMenu").css("display", "none");
$(".nav").show();
$(".nav li").removeClass("hover");
$(".nav li a").unbind('click');
$(".nav li").unbind('mouseenter mouseleave').bind('mouseenter mouseleave', function() {
// must be attached to li so that mouseleave is not triggered when hover over submenu
$(this).toggleClass('hover');
});
}
}
CSS
body, nav, ul, li, a {margin: 0; padding: 0;}
body {font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; }
a {text-decoration: none;}
.container {
width: 90%;
max-width: 900px;
margin: 10px auto;
}
.toggleMenu {
display: none;
background: #666;
padding: 10px 15px;
color: #fff;
}
.nav {
list-style: none;
*zoom: 1;
background:#175e4c;
}
.nav:before,
.nav:after {
content: " ";
display: table;
}
.nav:after {
clear: both;
}
.nav ul {
list-style: none;
width: 9em;
}
.nav a {
padding: 10px 15px;
color:#fff;
}
.nav li {
position: relative;
}
.nav > li {
float: left;
border-top: 1px solid #104336;
}
.nav > li > .parent {
background-image: url("images/downArrow.png");
background-repeat: no-repeat;
background-position: right;
}
.nav > li > a {
display: block;
}
.nav li ul {
position: absolute;
left: -9999px;
}
.nav > li.hover > ul {
left: 0;
}
.nav li li.hover ul {
left: 100%;
top: 0;
}
.nav li li a {
display: block;
background: #1d7a62;
position: relative;
z-index:100;
border-top: 1px solid #175e4c;
}
.nav li li li a {
background:#249578;
z-index:200;
border-top: 1px solid #1d7a62;
}
#media screen and (max-width: 768px) {
.active {
display: block;
}
.nav > li {
float: none;
}
.nav > li > .parent {
background-position: 95% 50%;
}
.nav li li .parent {
background-image: url("images/downArrow.png");
background-repeat: no-repeat;
background-position: 95% 50%;
}
.nav ul {
display: block;
width: 100%;
}
.nav > li.hover > ul , .nav li li.hover ul {
position: static;
}
}
HTML
<div class="container">
<a class="toggleMenu" href="#">Menu</a>
<ul class="nav">
<li>
Shoes
<ul>
<li>
Womens
<ul>
<li>Sandals</li>
<li>Sneakers</li>
<li>Wedges</li>
<li>Heels</li>
<li>Loafers</li>
<li>Flats</li>
</ul>
</li>
<li>
Mens
<ul>
<li>Loafers</li>
<li>Sneakers</li>
<li>Formal</li>
</ul>
</li>
</ul>
</li>
<li>
Shirts
<ul>
<li>
Mens
<ul>
<li>T-Shirts</li>
<li>Dress Shirts</li>
<li>Tank Tops</li>
</ul>
</li>
<li>
Womens
<ul>
<li>T-Shirts</li>
<li>Blouses</li>
<li>Dress Shirts</li>
<li>Tunics</li>
<li>Camisoles</li>
</ul>
</li>
</ul>
</li>
<li>
Pants
<ul>
<li>
Mens
<ul>
<li>Trousers</li>
<li>Slacks</li>
<li>Jeans</li>
</ul>
</li>
<li>
Womens
<ul>
<li>Trousers</li>
<li>Slacks</li>
<li>Jeans</li>
<li>Leggings</li>
</ul>
</li>
</ul>
</li>
<li>
Skirts
<ul>
<li>
Long
<ul>
<li>Denim</li>
<li>Knits</li>
</ul>
</li>
<li>
Short
<ul>
<li>Denim</li>
<li>Knits</li>
</ul>
</li>
<li>
Mini
<ul>
<li>Denim</li>
<li>Knits</li>
</ul>
</li>
</ul>
</li>
<li>
Dresses
<ul>
<li>
Casual
</li>
<li>
Formal
<ul>
<li>Wedding</li>
<li>Party</li>
</ul>
</li>
</ul>
</li>
<li>
Sweaters
<ul>
<li>
Mens
<ul>
<li>Wool</li>
<li>Knitwear</li>
<li>Light Sweaters</li>
<li>Cardigans</li>
<li>Hoodies</li>
</ul>
</li>
<li>
Womens
<ul>
<li>Wool</li>
<li>Knitwear</li>
<li>Light Sweaters</li>
<li>Cardigans</li>
<li>Hoodies</li>
</ul>
</li>
</ul>
</li>
<li>
Accessories
<ul>
<li>
Womens
<ul>
<li>Belts</li>
<li>Bags</li>
<li>Jewelery</li>
<li>Hats</li>
<li>Eyewear</li>
</ul>
</li>
<li>
Mens
<ul>
<li>Belts</li>
<li>Hats</li>
<li>Eyewear</li>
</ul>
</li>
</ul>
</li>
<li>
Outerwear
<ul>
<li>
Womens
<ul>
<li>Winter</li>
<li>Spring/Fall</li>
</ul>
</li>
<li>
Mens
<ul>
<li>Winter</li>
<li>Spring/Fall</li>
</ul>
</li>
</ul>
</li>
<li>
Shipping Info
</li>
</ul>
</div>

The initial value of ww is '100%', which is a string.
On $(document).ready you call the adjustMenu() method, which reads the value of ww.
Both conditions (ww < 768 and ww >= 768) evaluate to false, so adjustMenu() does nothing on DOMready.
You can avoid this to call $(window).trigger('resize') instead of calling adjustMenu() in your $(document).ready(function() { ... } method so that ww has a numeric value:
$(document).ready(function() {
$(".nav li a").each(function() {
if ($(this).next().length > 0) {
$(this).addClass("parent");
};
})
$(".toggleMenu").click(function(e) {
e.preventDefault();
$(this).toggleClass("active");
$(".nav").toggle();
});
$(window).bind('resize orientationchange', function() {
ww = document.body.clientWidth;
adjustMenu();
});
$(window).trigger('resize');
});

how to make mouseenter function with fade in effect and stays there

I want to create a tab and when someone hover on that tab someway below a new ul items should display with fade in and fade out effect. Till now I have used mouseenter and the new diplay items should stay there to choose other options.
HTML
<ul class="sector-nav">
<li>Residential</li>
<li>Commerical</li>
<li>Private</li>
</ul>
<ul class="res-pro residential-pro">
<li>rProject 1</li>
<li>rProject 2</li>
<li>rProject 3</li>
</ul>
<ul class="com-pro commercial-pro">
<li>cProject 1</li>
<li>cProject 2</li>
<li>cProject 3</li>
</ul>
JS
$(document).ready(function() { $('.residential-main').mouseenter(function() { $('.residential-pro').show(); }); $('.residential-main').mouseleave(function () { $('.residential-pro').hide(); }); });
$(document).ready(function() { $('.commercial-main').mouseenter(function() { $('.commercial-pro').show(); }); $('.commercial-main').mouseleave(function () { $('.commercial-pro').hide(); }); });
See jsFiddle

You don't need javascript for this as you can do it using CSS only with the :hover psuedo selector.
First you need to make the related ul elements children of their parent li:
<ul class="sector-nav">
<li>
Residential
<ul class="res-pro residential-pro">
<li>rProject 1</li>
<li>rProject 2</li>
<li>rProject 3</li>
</ul>
</li>
<li>
Commerical
<ul class="com-pro commercial-pro">
<li>cProject 1</li>
<li>cProject 2</li>
<li>cProject 3</li>
</ul>
</li>
<li>Private</li>
</ul>
Then amend the following selectors to hide/show the relevant ul elements on hover:
.sector-nav > li {
display: inline;
padding-right: 20px;
border-right-width: 1px;
border-right-style: solid;
border-right-color: #999;
padding-left: 20px;
position: relative;
}
.sector-nav li > ul {
display: none;
position: absolute;
}
.sector-nav > li:hover > ul {
display: block;
}
Example fiddle

The better way would be to use CSS. Here is fiddle a with fadeIn animation example.
.fadeIn {
border: 1px solid #48484A;
font-size: 18px;
opacity:0;
-webkit-transition : all 2s ease-out;
-moz-transition : all 2s ease-out;
-o-transition : all 2s ease-out;
transition : all 2s ease-out;
}
.thisText:hover .fadeIn {
opacity: 1;
}
But since your are using JQuery, you can also use his fadein function which provide animation.
Here is an example from the JQuery documentation:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>fadeIn demo</title>
<style>
p {
position: relative;
width: 400px;
height: 90px;
}
div {
position: absolute;
width: 400px;
height: 65px;
font-size: 36px;
text-align: center;
color: yellow;
background: red;
padding-top: 25px;
top: 0;
left: 0;
display: none;
}
span {
display: none;
}
</style>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>
<p>
Let it be known that the party of the first part
and the party of the second part are henceforth
and hereto directed to assess the allegations
for factual correctness... (click!)
<div><span>CENSORED!</span></div>
</p>
<script>
$( "a" ).click(function() {
$( "div" ).fadeIn( 3000, function() {
$( "span" ).fadeIn( 100 );
});
return false;
});
</script>
</body>
</html>
See the doc for more examples (JQuery doc)

If you want to use js, your solution is very close.
Just replace jquery show,hide with fadeIn and fadeOut respectively and initially hide the elements from css. However you also need to modify your html, so that children are presented under their parents.
HTML
<ul class="sector-nav">
<li class="residential-main">Residential<ul class="res-pro residential-pro">
<li>rProject 1
</li>
<li>rProject 2
</li>
<li>rProject 3
</li>
</ul>
</li>
<li class="commercial-main"><a href="#" >Commerical</a>
<ul class="com-pro commercial-pro">
<li>cProject 1
</li>
<li>cProject 2
</li>
<li>cProject 3
</li>
</ul>
</li>
<li>Private
</li>
</ul>
CSS
.sector-nav li {
display: inline;
}
.residential-pro , .commercial-pro{
display:none;
position:absolute;
padding:0;
}
.residential-pro li, .commercial-pro li{
display:block;
}
JS
$(document).ready(function () {
$('.residential-main,.residential-pro').mouseenter(function () {
$('.residential-pro').stop(false,true).offset({left:$('.residential-main').offset().left}).fadeIn();
});
$('.residential-main').mouseleave(function () {
$('.residential-pro').stop(false,true).fadeOut();
});
});
$(document).ready(function () {
$('.commercial-main,.commercial-pro').mouseenter(function () {
$('.commercial-pro').stop(false,true).offset({left:$('.commercial-main').offset().left}).fadeIn();
});
$('.commercial-main').mouseleave(function () {
$('.commercial-pro').stop(false,true).fadeOut();
});
});
http://jsfiddle.net/tEMQj/7/

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how to make mouseenter function with fade in effect and stays there

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