Develop Reference

How to prevent get over other divs?

I have a problem...In the following example i don't want that the div who is fixed get over the div with the background red.
Here is the example:
http://jsfiddle.net/HFjU6/3645/
#fixedContainer
{
background-color:#ddd;
position: fixed;
width: 200px;
height: 100px;
left: 50%;
top: 0%;
margin-left: -100px; /*half the width*/
}

Alright, I think I get what the OP wants. He wanted a container that stays fixed on the top of the viewport, but remains confined by a parent. This behaviour is known as a conditional sticky behaviour, and is actually implemented in both Firefox (without vendor prefix) and macOS/iOS Safari (with -webkit- prefix): see position: sticky.
Therefore the easiest (but also the least cross-browser compatible) way is simply to modify your markup, such that the sticky element stays within a parent, and you declare position: sticky on it:
* {
margin: 0;
padding: 0;
}
#fixedContainer {
background-color: #ddd;
position: -webkit-sticky;
position: sticky;
width: 200px;
height: 100px;
left: 50%;
top: 0%;
transform: translate(-50%, 0); /* Negative left margins do not work with sticky */
}
#div1 {
height: 200px;
background-color: #bbb;
}
#div1 .content {
position: relative;
top: -100px; /* Top offset must be manually calculated */
}
#div2 {
height: 500px;
background-color: red;
}
<div id="div1">
<div id="fixedContainer">I am a sticky container that stays within the sticky parent</div>
<div class="content">Sticky parent</div></div>
<div id="div2">Just another element</div>
An alternative would be to use a JS-based solution. In this case, you do not actually have to modify your markup. I have changed the IDs for easier identification of the elements, however.
The gist of the logic is this:
When the scroll position does not exceed the bottom of the parent minus the outer height of the sticky content, then we do not do anything.
When the scroll position exceeds the bottom of the parent minus the outer height of the sticky content, we dynamically calculate the top position of the sticky content so that it remains visually in the parent.
$(function() {
$(window).scroll(function() {
var $c = $('#sticky-container'),
$s = $('#sticky-content'),
$t = $(this); // Short reference to window object
if ($t.scrollTop() > $c.outerHeight() - $s.outerHeight()) {
$s.css('top', $c.offset().top + $c.outerHeight() - $t.scrollTop() - $s.outerHeight());
} else {
$s.css('top', 0);
}
});
});
* {
margin: 0;
padding: 0;
}
div {
height: 500px;
background-color: red;
}
#sticky-container {
background-color: #bbb;
height: 200px;
}
#sticky-content {
background-color: #ddd;
position: fixed;
width: 200px;
height: 100px;
margin-left: -100px;
left: 50%;
top: 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="sticky-content">Sticky content that stays within the bounds of #div1</div>
<div id="sticky-container">Sticky confinement area</div>
<div>Other content</div>
Old answer before OP clarified the question appropriately:
Just give them the appropriate z-index values. In this case, you want to:
Do not use static positioning. This can be done by using position: relative for the large elements, in conjunction with the originally position: fixed element.
Assign the appropriate stacking order. The grey <div> element to have the lowest z-index, followed by the position fixed element, and then by the red element.
There are some catchalls to stacking though: the stacking context is reset when you traverse up or down the node tree. For example, the example will not work if the elements are not siblings.
Here is a proof-of-concept example, modified from your fiddle so that inline CSS is removed.
* {
margin: 0;
padding: 0;
}
#fixedContainer {
background-color: #ddd;
position: fixed;
width: 200px;
height: 100px;
left: 50%;
top: 0%;
margin-left: -100px;
z-index: 2;
}
#div1 {
height: 200px;
background-color: #bbb;
position: relative;
z-index: 1;
}
#div2 {
height: 500px;
background-color: red;
position: relative;
z-index: 3;
}
<div id="fixedContainer">z-index: 2</div>
<div id="div1">z-index: 1</div>
<div id="div2">z-index: 3</div>

Just give the z-index.
Hope it helps...
http://jsfiddle.net/HFjU6/1/#run
#fixedContainer {
background-color:#ddd;
position: fixed;
width: 200px;
height: 100px;
left: 50%;
top: 0%;
margin-left: -100px; /*half the width*/
z-index: 2;
}
.div-red {
position: relative;
z-index: 5;
}
<div id="fixedContainer"></div>
<div style="height:200px;background-color:#bbb;"></div>
<div style="height:500px;background-color:red;" class="div-red"></div>

jQuery - Text and Image scrolling effects are not working

http://honghanhdinh.com/
I am currently developing my website and I am running into some troubles with some of the parallax tutorials I am learning.
As you can see, the plane and the words to my name "Hong" appears on on the opening page but the other 2 parts of my name "Hanh Dinh" only appears when beginning to scroll down. In addition, the plane also disappears upon scrolling and flys out from the right to the left.
I don't want the plane to appear upon entering the website but for it to naturally slide out to the left when scrolling down. I also want my full name "Hong Hanh Dinh" to appear upon entering the website--not just the Hong part.
I've tried many things to fix it but I think I'm missing something.
Here is the beginning of HTML code:
<BODY>
<!--Begin about info--!>
<MAIN>
<section id="bg" data-speed="10" data-type="background">
<div id="plane">
<img src="http://www.locanto.info/classifieds/images/airplane.png">
</div>
<div id="parallax2">
<h2 id="center" class="parallax2">Hong</h2>
<h2 id="left" class="parallax2">Hanh</h2>
<h2 id="right" class="parallax2">Dinh</h2>
</div>
</section>
Here is my CSS:
#bg {
background-color: #FFFFFF;
background-size
}
#parallax2 {
height: 800px;
margin-bottom: 600px;
overflow: hidden;
padding-top: 200px;
}
/* Parallax Scrolling text */
#center.parallax2 {
font-size: 175px;
color: #CC3333;
opacity: 0.5;
text-align: center;
left: 200px;
padding: 0;
position: relative;
bottom: 100px;
}
#left.parallax2 {
color: #336699;
font-size: 200px;
text-align: left;
left: 400px;
opacity: 0.75;
overflow: hidden;
position: relative;
}
#right.parallax2 {
color: #C5C3DE;
font-size: 250px;
text-align: right;
opacity: 0.5;
overflow: hidden;
position: relative;
width: 1200px;
bottom: -300px;
}
This is the jQuery for the "Hong Hanh Dinh" scrolling:
$(document).ready(function() {
var controller = $.superscrollorama();
controller.addTween(
'#parallax2',
(new TimelineLite()).append([
TweenMax.fromTo($('#left.parallax2'), 1, {
css: {
top: 200
},
immediateRender: true
}, {
css: {
top: -900
}
}),
TweenMax.fromTo($('#right.parallax2'), 1, {
css: {
top: 500
},
immediateRender: true
}, {
css: {
top: -1800
}
})
]), 1000 // scroll duration of tween
);
});
This is the jQuery for the flying plane:
$(document).ready(function() {
$(window).scroll(function() {
console.log($(this).scrollTop());
$('#plane').css({
'width': $(this).scrollTop(),
'height': $(this).scrollTop()
});
});
});
Please let me know if my error is in the CSS or in the jQuery. Thank you!

I think you could fix this by adding width: 0; and overflow: hidden; to your div#plane. Otherwise, follow these steps:
Step 1:
Remove the img tag from the plane div, it is not needed. Add the id to the img tag itself.
<img id="plane" src="http://www.locanto.info/classifieds/images/airplane.png">
Step 2:
#plane{
position: fixed;
right: -WIDTH OF IMAGE;
}
Step 3:
$(document).ready(function() {
$(window).scroll(function() {
$('#plane').css({
'right': $(this).scrollTop() - WIDTH OF IMAGE,
});
});
});

Your name "Hanh Dinh" does exist when it loads but it is out of our range of sight, change this line:
css: {
top: 200
}
To a number like -400 and you'll see it'll appear on screen.
(That is for Hanh, for Dinh you'll need a larger number like -900.

.toggleClass not toggling a certain class, but is working on all others

So I have a page on my website that has some navigation elements that stick on the page when the user scrolls past a certain point. There are three of them, one on the top, one on the left, and one on the right. HTML and CSS is as follows:
<div id="nav" class="nav">
<!--STUFF CONTAINED IN TOP NAV BAR-->
</div>
<div class="right" id="right">
<!--STUFF CONTAINED IN RIGHT NAV-->
</div>
<div class="left" id="left">
<!--STUFF CONTAINED IN LEFT NAV BAR-->
</div>
.nav {
position: absolute;
top: 108px;
height: 45px;
width: 100%;
left: 0;
right: 0;
}
.nav_sticky {
position: fixed;
top: 0;
height: 45px;
left: 0;
right: 0;
background-image: url(images/backgrounds/stardust_#2X.png);
z-index: 10;
}
.right {
width: 200px;
height: 900px;
position: absolute;
right: 50%;
margin-right: -538px;
top: 153px;
}
.right_sticky {
width: 200px;
height: 900px;
position: fixed;
right: 50%;
margin-right: -538px;
top: 45px;
}
.left {
width: 200px;
height: 900px;
position: absolute;
left: 50%;
margin-left: -538px;
top: 153px;
}
.left_stick {
width: 200px;
height: 900px;
position: fixed;
left: 50%;
margin-left: -538px;
top: 45px;
}
I then use the follow JQuery to cause these elements to stick.
<script>
$(document).ready(function(){
var navPos = $('#nav').offset().top;
$(window).scroll(function () {
var scrollTop = $(this).scrollTop();
if (scrollTop >= navPos) {
var classNamee = $('#nav').attr('class');
console.log(classNamee);
if (classNamee === "nav") {
$("#nav").toggleClass('nav nav_sticky');
$("#right").toggleClass('right right_sticky');
$("#left").toggleClass('left left_stick');
}
}
if (scrollTop <= navPos) {
var className = $('#nav').attr('class');
console.log(className);
if (className === "nav_sticky") {
$("#nav").toggleClass('nav_sticky nav');
$("#right").toggleClass('right_sticky right');
$("#left").toggleClass('left left_stick');
}
}
});
});
</script>
Here's my problem. This works perfectly for the top and right navs, however no matter what I try, the left nav continues to scroll when the others have stopped. I thought it may have been a typo in the css class, but when I looked in the inspector, the .toggleClass function doesn't even change the class on the #left element when it does on the other two. Any ideas as to what could be causing this?

If I copy/paste your sample code as-is to jsFiddle and run it, when you scroll down far enough, it does correctly toggle everything to *_sticky classes, but something about the negative margin-right on the right class element seems to reset the scroll to the top (at least in Chrome) when it flips between .right and .right-stick. When the scroll gets reset, it also reruns your event handeler and changes all the classes back.
Try removing these lines from your CSS and see if the behavior works right (it does in Chrome in a jsFiddle)
.right {
...
/*margin-right: -538px;*/
.right-stick {
...
/*margin-right: -538px;*/

How to get the position of an element relative to another using jQuery?

Please have a look at this:
http://liveweave.com/5bhHAi
If you click the "Get Pos" link you will see the red div's position relative to the image.
Now say this image's size has changed at some point down the line. How can I get the new position for the red div based on the initial data?
HTML:
<div id="watermark"></div>
<img src="http://placekitten.com/g/320/270" class="small-img">
<div><br><br>Get Pos</div>
jQuery:
$(document).ready(function() {
var $watermark = $('#watermark');
$('.get-pos').on('click', function(e) {
e.preventDefault();
var watermark_position = {
top: $watermark.position().top - $('.small-img').position().top,
left: $watermark.position().left - $('.small-img').position().left
};
alert(watermark_position.top + 'px from the top');
alert(watermark_position.left + 'px from the left');
});
});
CSS:
#watermark { background: red; position: absolute; top: 215px; left: 265px; width: 50px; height: 50px; }

Here is a solution to what I understand you want from question/comments:
http://jsfiddle.net/tXT2d/
var imgPos = $(".image img").offset();
var wmPos_tmp = $(".watermark").offset();
var watermarkPosition = {
top: wmPos_tmp.top - imgPos.top,
left: wmPos_tmp.left - imgPos.left
}

You can accomplish your intended goal (placing the watermark at the right place even after size changes) without using javascript at all if you do just a little reworking. A working example of the following solution is here
(just change the width of the .img-container to see it function).:
.watermark {
background: red;
width: 50px;
height: 50px;
}
.img-container {
width: 295px;
height: auto;
position: relative;
}
.img-container img {
width: 100%;
}
.img-container .watermark {
position: absolute;
right: 10px;
bottom: 10px;
}
<div class="img-container">
<div class="watermark"></div>
<img src="http://placekitten.com/g/320/270" class="small-img">
</div>
Your html containing the image will look basically like this:
<div class="img-container">
<div class="watermark"></div>
<img src="http://placekitten.com/g/320/270" class="small-img">
</div>
And the css to get the placement to happen looks like this:
.watermark { background: red; width: 50px; height: 50px; }
.img-container {
width: 275px;
height: auto;
position: relative;
}
.img-container img {
width: 100%;
}
.img-container .watermark {
position: absolute;
right: 10px;
bottom: 10px;
}
Here, the image will always match the width of its container, and the watermark will always place itself ten pixels from the right and ten pixels from the bottom of the container.

div popup not working

What I am doing wrong?
When you click on class divtop, it should show a div popup in the middle of the page. At that time back page should become not clickable. escape or a button in popup will close it.
<html lang="en" class=" en">
<head>
<title>My Test Popup</title>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<style type="text/css">
.divtop
{
width: 800px;
height: 300px;
border:solid;
}
.divbottom
{
top: 400px;
}
.localmenu {
border: 1px solid black;
background: #fff;
margin-left : auto;
top: 50px; width: 300px;
padding-top: 25px;
margin-top: 100px;
height: 150px;
}
.appContent{
width: 800px;
border:solid;
height: 600px;
display: block;
margin-left: auto;
margin-right: auto;
}
.maincontent{
width: 100%;
}
</style>
</head>
<body>
<div class="appContent" >
<div class="maincontent" >
<div class="divtop" >Top</div>
<div class="divtop divbottom" >Bottom</div>
</div>
<div id="popup" style="width : 100%; height: 600px;display: none;">
<div class='localmenu'>
Text in Div Popup<br/>
<button id="btnHide">Close</button><br/>
</div>
</div>
</div>
<script>
$(document).ready(function() {
$('.divtop').click(function() {
$('#popup').show().css("top", "500px").animate({top: 50}, 200);
$('.mainContent').css("background-color", "grey");
});
$('#btnHide').click(function() {
$('#popup').hide();
});
});
</script>
</body>
</html>

Fiddle
I added some CSS to your #popup and it's now all in the CSS (not inline in the html). Changed also your jQuery animate to 50px, instead of just 50.
I think you have small adjustments to do to the CSS, like in .localmenu I'm not sure why you have both padding-top: 25px; margin-top: 100px;.
CSS
#popup {
position:absolute;
display: none;
float: left;
left:30%;
z-index:1;
}
#popoverlay {
position: fixed;
display:none;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: #000;
opacity: 0.5;
}
jQuery
$(document).ready(function () {
$('.divtop').click(function () {
$('#popoverlay').show();
$('#popup').show().css("top", "500px").animate({
top: "50px"
}, 200);
$('.mainContent').css("background-color", "grey");
});
$('#btnHide').click(function () {
$('#popup').hide();
$('#popoverlay').hide();
});
});
HTML
<div class="appContent">
<div class="maincontent">
<div class="divtop">Top</div>
<div class="divtop divbottom">Bottom</div>
</div>
<div id="popup">
<div class='localmenu'>Text in Div Popup
<br/>
<button id="btnHide">Close</button>
<br/>
</div>
</div>
</div>

To get it to work properly, even if there is a vertical scroll bar, you have to use position "fixed". Place popup as a direct child of body and make it's position: fixed, and width and height 100%. Place localmenu as a direct child of body as well. Working example at jsbin.
Html:
<div id="popup">
<!--// This is to stop the user from interacting with the content in the back
// and to give a visual clue about that
-->
</div>
<div class='localmenu'>
<div>
Text in Div Popup<br/>
<button id="btnHide">Close</button><br/>
</div>
</div>
<div class="appContent" >
<div class="maincontent" >
<div class="divtop" >Top</div>
<div class="divtop divbottom" >Bottom</div>
</div>
</div>
CSS:
//Use opacity to give a visual clue. Please note that this doesn't work in -all- browsers
#popup {
position: fixed;
width: 100%;
height: 100%;
display: none;
background: black;
opacity: .5;
top: 0;
left: 0;
}
//This is just to be able to center the actual menu
.localmenu {
top: 20%;
left: 0;
width: 100%;
position: fixed;
height: 150px;
display: none;
}
.localmenu > div {
border: 1px solid blue;
background: #fff;
margin-left : auto;
margin-right: auto;
width: 300px;
height: 150px;
}
Javascript: (This is mostly the same, although I removed the animate, because I don't know exactly how it works and it needs to end at 'top: 0'. As localmenu and popup are seperate, we show them seperate as well.)
$(document).ready(function() {
$('.divtop').click(function() {
$('#popup').show().animate(200);
$('.localmenu').show();
//$('.mainContent').css("background-color", "grey");
});
$('#btnHide').click(function() {
$('#popup').hide();
$('.localmenu').hide();
});
});

To block the div tags at the back from being clickable:
Add a div with the following style in your HTML. Im gonna call it overlay.
.overlay {
width: 100%;
height: 100%;
background-color: #000;
left: 0;
opacity: .8;
position: absolute;
top: 0;
z-index: 10000;
display: none;
}
This will essentially cover up your page when shown up.
To center your popup:
I added some extra styles to #popup and removed some from .localmenu. You were missing position: absolute and z-index, added those in. (z-index of popup must be > z-index of overlay)
#popup {
background: #fff;
position :absolute;
left : 40%;
width : 300px;
height: 600px;
height: 150px;
display: none;
z-index: 10001;
}
.localmenu
{
border: 1px solid black;
}
Then, in your JS,
In your animate method, I changed 50px to 30% to center div#popup
Added code to hide and show .overlay along with #popup.
After the changes,
$(document).ready(function () {
$('.divtop').click(function () {
$('#popup').show().css("top", "500px").animate({
top: "30%"
}, 200);
$('.overlay').show();
});
$('#btnHide').click(function () {
$('#popup,.overlay').hide();
});
});
Demo
http://jsbin.com/olasog/1
Code
http://jsbin.com/olasog/1/edit

Try this:
$(document).ready(function() {
$('.divtop').click(function() {
var div = $('.appContent');
$('.localmenu').css({'margin': '200px auto'});
$('#popup').show().css({top: "500px", position: 'absolute', width: div.width(), height: div.height()}).animate({top: 0}, 200);
$('.mainContent').css("background-color", "grey");
});
$('#btnHide').click(function() {
$('.mainContent').css("background-color", "");
$('#popup').hide();
});
});