I'm currently making a website with a "Support is Live" div which will be following the user when scrolling. So I gave it Position: Fixed; and all works fine.
But when the user scrolls back up, I want the Support div to stop so it doesn't "touch" the header.
Here is a picture that hopefully makes it easier to understand:
http://gyazo.com/2694b03181a39c3b6673901b42b5952d
I want the yellow div to stop in line with the orange field on the picture. But when the user starts to scrolling down again, it will follow.
My Best Regards
Philip
This will need some JQuery to work properly:
JSFIDDLE
JQuery
$(document).on("scroll", function() {
if($(document).scrollTop() < 100) {
$('#alert').addClass("absolute");
} else if($(document).scrollTop() > 100) { //100 is the height of your header. Adjust if needed
$('#alert').removeClass("absolute");
}
});
CSS
.absolute {
top: 100px; //same as the value in the conditions
position: absolute;
}
#alert{
background-color: #FF0;
float: left;
height: 400px;
width: 230px;
margin-left: 20px;
position: fixed;
z-index:999;
}
HTML
<div id="alert" class="absolute"> </div>
/!-- add the class so that it doesn't mess up the layout when you load the page --!/
The srolltop function checks how much space is between your viewport and the top of your document. When it reaches the height of the header, a class absolute is applied in order to keep the #alert div in its place.
Related
I'm trying to replicate this overlay phone effect from this website:
https://www.beemit.com.au/
Basically, when you scroll down, the contents inside the fixed div (phone) also change.
I cannot grasp my head around the revealing effect created when you scroll down. I have only managed to create the fixed div and the various sections on the webpage.
Here's a simple version of the overlay-on-scroll.
There are 3 elements, the first image you want to be shown in the 'phone', the second image which gradually gets revealed and the footer element. They have different z-indexes so footer is behind both first and second and second is behind first.
The phone has a fixed position so it doesn't move on scrolling. The footer is placed relative to the body (or whatever container you have) just out of view at 100%.
We introduce a simple event listener on scrolling which tests whether there is an overlap between the footer and the phone. If there is then we set the height of the first image element to be its original height minus the overlap. This reveals the bottom part of the second element.
Without seeing your code I can't tell whether you need more sophistication (for example, you have to be aware of stacking contexts if your phone and footer are not in the same one).
const footer = document.querySelector('.footer');
const first = document.querySelector('.first');
const firstBottom = first.getBoundingClientRect().bottom;
const firstHeight = firstBottom - first.getBoundingClientRect().top;
function checkOverlay() {
const top = footer.getBoundingClientRect().top;
if ( top < firstBottom) {
first.style.height = firstHeight - firstBottom + top + 'px';
}
}
body {
width:100vw;
height: 100vh;
overflow-y: scroll;
overflow-x: hidden;
}
.first, .second {
position: fixed;
top: 50%;
left: 50%;
border: 1px solid black;
width: 20vmin;
height: 30vmin;
overflow:hidden;
}
.first {
background-image: linear-gradient(magenta, pink);
z-index: 0;
}
.second {
background-image: linear-gradient(cyan, lime);
z-index: -1;
}
.footer {
width: 100%;
height: 50%;
background-image: linear-gradient(red,blue);
position: relative;
top: 100%;
z-index: -2;
}
<body onscroll="checkOverlay();">
<div class="first"></div>
<div class="second"></div>
<div class="footer"></div>
</body>
What do i want to achive?
I want to remove a div which isnt visible(for the user not the css atribute) anymore on the screen because i let the html and body scroll to a div with jquery(scrollTop). Now i want to remove the div which was visible beforr i scrolled down with jquery.
Edit: After removing the .header div, the #begining should be the top of the page and the .header div should be removed forever.
What is the problem?
After i scrolled down and removed the div with the following line of code: $('.header').css('display','none'); the scroll position changes.
Code to scroll down and remove the div.
function scrollToBegining(){
$('html, body').animate({
scrollTop: $("#begining").offset().top
}, 750);
setTimeout(function(){
$('.header').css('display','none');
},750);
}
Problem visualized:
GIF of the problem (Watch to understand better)
This is odd, but I think a better choice is to slideUp the div instead of scrolling:
function scrollToBegining(){
$('.header').slideUp(750);
}
Obviously, rename the function since it's no longer scrolling.
You can use visibility: hidden to hide the div but reserve its space. Also, sometimes the scroll position has to be changed when you use display: none.
visibility: hidden
is what you are looking for, but another solution I use with this kind of issue is instead of scrolling down to your second div, have the initial div shrink its height in a uniform animation until it is 0. This prevents the weird shuddering scroll issue you are experiencing
document.querySelector('#header h1').addEventListener('click', closeHeader)
function closeHeader(){
document.querySelector('#header').classList.add("hidden");
}
#header {
height: 300px;
width: 100%;
background: red;
text-align: center;
}
#content {
height: 1000px;
width: 100%;
background: yellow;
text-align: center;
}
.hidden {
display: none !important;
margin: 0 !important;
padding: 0 !important;
}
<div id="header">
<h1>
HEADER
</h1>
</div>
<div id="content">
CONTENT
</div>
I have a header, in which i put my h1 and h2 headings at top. The problem is that header scrolls along the scroll bar which is of course normal but i want to fixed it at some point when all the headings on header scroll away. At this point I want header to stop and stays fixed.
I already tried fixed position but of course it fixed heading as well which exactly I don't want.
I also tried this JavaScript but no luck.
JavaScript
$(window).scroll(function() {
var _height = 120 - (120 * $(this).scrollTop() / $('body').height());
if (_height >= 80) {
$('.header_container').height(_height);
}
});
and here qre my HTML and CSS codes respectively.
HTML
<div class="header_container" id="header_container">
<div id="header_titles">
<h1 class="homepage-heading">Browse</h1>
<h2 class="homepage-heading-subtle">GENRES & MOODS</h2>
</div>
</div>
CSS
#header_container {
background-color: black;
width: 100%;
height: 120px;
top: 0;
left: 0;
right: 0;
}
#header_titles {
position: absolute;
width: 100%;
font-size: 35px;
text-align: center;
padding-top: 10px;
}
So, let me see if I get this...you want your header to be scrolled normally with the page until a certain point where it becomes fixed?
EDIT
Ok, well, you could determine the element on the page that you want the position to be triggered at. Like, the top of a certain paragraph, and use that position in your condition.
var condition = $(element).offset().top;
if($(window).scrollTop > condition) { //add a fixedClassName } else { remove the fixedClassName }
and have header.fixedClassName have those proprieties ( with position fix, top 0 and width: 100% to your header etc). Be sure to add and remove a class on the body that gives it padding-top with the height of your displaced header.
Used some similar effect here http://goodmen.se/ after a point the logo shows up in the header, then there's a background change. You do something similar with your position.
EDIT 2
Here's an example fiddle http://jsfiddle.net/Corsico/vpskd8hd/
So you want a sticky header?
In your javascript create a code:
var $header_container = $('#header_container');
var header_height = $header_container.outerHeight(true);
if($(window).scrollTop() < header_height){
$header_container.removeClass('sticky');
} else{
$header_container.addClass('sticky');
}
$(window).on('scroll', function(){
if($(window).scrollTop()< header_height){
$header_container.removeClass('sticky');
} else{
$header_container.addClass('sticky');
}
});
This will add a sticky class to your header, and then you can set the header to be fixed:
.sticky{
position:fixed;
top:0;
left:0;
width:100%;
display:block;
}
This should do it. When you scroll pass the height of the header, you'll get the 'sticky' class, if not, you'll remove the sticky class...
I have html sturcture
<div id="bg" class="layer">
<img id="trackmap" src="images/back_2416.jpg" width="1208" height="768" class=" ui-draggable map-icon" usemap="#main-map" data-zoom-image="images/background_zoom.jpg" data-big="images/background_zoom.jpg" style="position: relative; left: -439px; top: -272.6px; margin: 0px; display: inline-block; height: 1327.2px; width: 2088px;">
<div id="nav-text">LOREM IPSUM.</div>
</div>
Jquery
var windowHeight = $("#trackmap").height();
var windowWidth = $("#trackmap").width();
var text_height=((windowHeight)-(100));
$("#nav-text").css("top",windowHeight);
Css
.layer {
position: absolute;
width: 1208px;
height: 768px;
}
#nav-text{
z-index: 200;
color: white;
position: absolute;
font-size: 10px;
margin-left: 715px;
width: 310px;
height: 10px;
position: fixed;
bottom: 5px;}
I just want to fix the nav-text to the bottom right whatsoever.. Now i problem i am facing is theres zoom function on the trackmap.. which increases the height and width of the image ..so the text comes in between of the image ..intereferring with the image.. I have tried taking the image width height using jquery ..but somehow its not working
I am not sure I am following your issue here, but it sounds like you are trying to get a div to be in the bottom-right of another div no matter what size it is. That can be done by setting the parent div position to relative which you have, and the child div position to absolute. You have that set but then override it by setting the position to fixed lower in the CSS. You will also want to set the bottom to 0 and the right to 0.
This will position the child div to the bottom right of the parent div. Then you can get rid of your jQuery. Hopefully this helps.
Ok.. I am in a hurry to catch the bus.. but here's a fiddle that illustrates the idea..
basically you will need to use the scrolltop and left parameters to do so:
$(".container").on("scroll", function() {
$(".nav-text").css("top", $(this).prop("scrollTop") + 130);
$(".nav-text").css("left", $(this).prop("scrollLeft") + 120);
});
but move the scrolls first.. sorry I need to go now..
You can achieve this by not fixing the .layer width and height, using display:inline-block; to prevent the div from filling the whole container width. At that point, the .layer size will match the image size whatever it is.
Finally you just need to set the text to absolute position and bottom and right properties too.
.parent{
display:inline-block;
position:relative;
}
.children{
position:absolute;
bottom:0;
right:0;
}
Here is the fiddle explaining
And here is the proof it works even if the image size is changed(click on the image).
Fiddle 2
Im trying to add a footer at the bottom of this content that doesn't overlay the content but moves it up.
The only way I can see it working would be something like, when browser is at the bottom remove 'fixed' class on the left red '#work'.
js fiddle DEMO
Updated js fiddle DEMO
HTML
<div id="header-block">
Header-block, this sits here in the background
</div>
<div id="content">
<div id="work">
This content should be fixed when at the top
</div>
<div id="description">
This content should scroll -
</div>
</div><!-- end content -->
<div id="footer">
This should appear at the bottom
</div>
CSS
body {
margin: 0px;
padding: 0px;
}
#header-block {
background: green;
width: 100%;
position: fixed;
z-index: 1;
height: 300px;
top: 0;
}
#content {
margin-top: 300px;
width: 100%;
position: relative;
z-index: 2;
}
#work {
background: red;
width: 50%;
height: 100vh;
float: left;
position: absolute;
}
#description {
background: blue;
width: 50%;
height: 1200px;
float: right;
font-size: 30px;
}
#footer {
background: black;
width: 100%;
height: 100px;
position: absolute;
z-index: 3;
bottom: 0;
}
If I understand your question correct, this should do the trick (although it depends very much on JavaScript unfortunately).
// Fix work column on scroll
contentStart = $("#content").offset().top ;
contentSize = $("#content").height() ;
window.onscroll = function(){
if( window.XMLHttpRequest ) {
var position=window.pageYOffset;
// calculate the position of the footer and the actual seen window
var docViewTop = $(window).scrollTop();
var docViewBottom = docViewTop + $(window).height();
var elemTop = $("#footer").offset().top;
if ( position > 300 && !(docViewBottom >= elemTop)) {
$('#work').css({'position':'fixed', 'top':'0', 'height':'100vh'});
} else {
// if the footer is visible on the screen
if(docViewBottom >= elemTop) {
$('#work').css({ 'top': 0 - (docViewBottom - elemTop) }); // scroll the #main div relative to the footer
} else {
$('#work').css({'position':'relative', 'top': 'auto'}) ;
}
}
}
}
For further informations about the calculations, perhaps this question on stackoverflow is useful.
Edit: Andrew Haining posted his answer in between of my answer, perhaps give his link a try and maybe it's a better (more proper) solution. Unfortunately I haven't actualised this page when I was testing your code in JSFiddle and I didn't see his answer.
If you want to use my script, make sure you can test it with different resolutions. It works just fine for my resolution in JSFiddle, I didn't test any other.
I'm not 100% sure what you want, but if you remove the position: absolute and the bottom: 0 from the footer, and put a div with class='clearboth' above the footer, it seems to do what you need.
CSS
.clearboth {
clear: both;
}
This is a drawing of what I see on your fiddle;
Do you want the red and the blue to always be touching the black?
I don't see the red overlying the black
You should use jQuery to add a class containing the position:fixed value when the scroll position of the page is less than the inline position of the #work div. Once it scrolls past the position, remove the class and have the element fall back in line.
You can achieve this using the following jQuery methods.. .scrollTop() .offset().top() and $(window).height().
This tutorial will give you an understanding of what you need to do to achieve the necessary results, you will just have to change the calculation slightly using $(window).height(), $('#footer').height() and a few other changes to get what you desire.
Based on the question you asked i think this is what you mean. The red div should be fixed when it gets to the top but be absolute when it is below the top for scrolling and the black footer should be below the red while scrolling, check this code i have done for you. just add this jquery script and run it.
<script type="text/javascript" src="js/jquery.js"></script>
<script>
$(document).ready(function() {
$(window).scroll(function () {
console.log($(window).scrollTop());
if ($(window).scrollTop() >= 322) {
$('#footer').css("z-index","1");
$('#work').css(
{
"background": "red",
"width": '50%',
'height': '100vh',
'float': 'left',
'position': 'fixed',
'top': '0'
});
}
if ($(window).scrollTop() <= 322)
{
$('#work').css(
{
"background": "red",
"width": "50%",
"height": "100vh",
"float": "left",
"position": "absolute"
});
};
});
});
</script>
If not exactly a parallax, this is somewhat close to how parallax works, containers moving at different speeds, and some containers sitting fixed or scrolling when they attain a particular top/bottom offset in the viewport.
There's plugin that can do it. Skrollr
You can use Skrollr along with skrollrcss, and it'll make sure how the containers take position on screen based on scrolltop of the window and the container specifically.