i have tried to replicate the sibebar scrolling used on wired.com but no luck yet :/
link - https://www.wired.com/story/the-bike-share-war-is-shaking-up-seattle-like-nowhere-else/
few things i have noticed-
the sidebar changes height dynamically depending on the content(can be a big picture or an ad) which is wider than the content in the middle portion
then it gets pushed up by that content.
After all have moved up, the sidebar appears again and sticks until it comes in contact with any such content.
i checked the source and it seems the sidebar is finding the height of the wider content and matching to it , and then the next , and in the last its 100%
PS - i am new to web development and any help would be immensely appreciated :) , thanks:
this is what i have tried
$(function(){
var d = $('#sidebar');
var dPosTop = d.offset().top;
var win = $(window);
win.scroll(function(e){
var scrollTop = win.scrollTop();
if(scrollTop >= dPosTop){
d.fadeIn(500);
}
else{
d.fadeOut(200);
}
});
});
$(document).ready(function(){
$("#sidebar").height( $("#content").height() );
});
Related
I have seen various forms of this problem but nothing really helped me to solve the partial sticky sidebar/Bootstrap column behaviour. Let me start with the problem itself.
There is a big image close to the top of my page. Because of the page complexity, I am using Bootstrap column grid. The image spans over, let's say, 10 columns and I have left 2, belonging to the same row, on the left side to store a sidebar. This also allows me to vertically align the sidebar next to the image.
Now, the sidebar, what is now a Bootstrap column, should go sticky and should stay vertically aligned to the viewport once the scrollbar passes by. You can see in the fiddle that it kind of "jumps" instead of transitioning smoothly.
The other problem is that the sticky element/column should only remain sticky as long as its parent/container is visible. Which means that it should transition/be relative to the end of that container. Right now I have only managed to keep it sticky till the end of the page. It should stop above the red line (depicted in the fiddle).
Here is my jQuery logic so far.
$(document).ready(function(){
$(window).scroll(function(){
var elem = $("#refScroller").offset().top - ($("#refScroller").height() / 2);
var windowvalue = $(window).scrollTop();
if (elem <= windowvalue) {
$("#wannabeSticky").addClass("sticky");
}
else {
$("#wannabeSticky").removeClass("sticky");
}
});
});
I would really appreciate some ideas and hints as this has been bothering me for two days. I would love to keep the Bootstrap grid structure if possible, but feel free to give any suggestions, even those who depict the sidebar as a pure absolute div, as long as the sticky-ness works.
Thanks in advance!
EDIT: I know there is a similar problem already here, but it seems I can't make the JS logic work for my case.
So, having spent another day on it, it seems I reached a decent jQuery version that gets the job done. There is my updated fiddle.
$(document).ready(function(){
var passedMobileNavi = false;
function stickySocialNavi(reference, valueExtracted) {
var refTop = $(reference).offset().top - valueExtracted;
var scrollTop = $(window).scrollTop();
return (refTop <= scrollTop);
}
$(window).scroll(function() {
if (stickySocialNavi($("#refScroller"), $("#refScroller").height())) {
if (!passedMobileNavi) {
passedMobileNavi = true;
$("#wannabeSticky").addClass("sticky");
}
}
else {
passedMobileNavi = false;
$("#wannabeSticky").removeClass("sticky");
}
if (stickySocialNavi($("#end"), $(window).height())) {
var var1 = $(window).scrollTop(),
var2 = $("#end").offset().top,
var3 = $(window).height();
var calculateOffset = (var2 - var3) - var1;
$("#wannabeSticky").css("top", "calc(50% + " + calculateOffset + "px)");
}
else {
$("#wannabeSticky").css("top", "50%");
}
});
});
For the sticky-ness to start, I took the reference point (which is the non-moving element right next to it) and its height. The sticky element gets a fixed position as long as the scrollbar goes past the reference point's center.
As the stick element is centered, it gets additional top offset values when the end of its container is reached. It is still fixed, but its top property's value takes the scroll difference, thus slowly depicting it towards the end of the container.
I don't know if this is the most elegant, straightforward, or easy to implement/understand solution, but it worked for me.
I have a sticky sidebar that when you scroll becomes fixed when the bottom of the sidebar is in view.
If the sidebar exceeds the length of the page as it does in this demo all works fine when you scroll and is exactly what you would expect.
However if the sidebar is shorter than the window height as in this demo, it seems to be jumping when you scroll and I can't work out how to get it to stop jumping and to be smooth. In other words it should only be fixed when the base of the sidebar hits the base of the window.
I'm not great with jQuery so any help would be greatly appreciated.
$(function () {
if ($('.leftsidebar').offset()!=null) {
var top = $('.leftsidebar').offset().top - parseFloat($('.leftsidebar').css('margin-top').replace(/auto/, 0));
var height = $('.leftsidebar').height();
var winHeight = $(window).height();
var footerTop = $('#footer').offset().top - parseFloat($('#footer').css('margin-top').replace(/auto/, 0));
var gap = 7;
$(window).scroll(function (event) {
// what the y position of the scroll is
var y = $(this).scrollTop();
// whether that's below the form
if (y+winHeight >= top+ height+gap && y+winHeight<=footerTop) {
// if so, ad the fixed class
$('.leftsidebar').addClass('leftsidebarfixed').css('top', winHeight-height-gap +'px');
}
else if (y+winHeight>footerTop) {
// if so, ad the fixed class
$('.leftsidebar').addClass('leftsidebarfixed').css('top', footerTop-height-y-gap + 'px');
}
else {
// otherwise remove it
$('.leftsidebar').removeClass('leftsidebarfixed').css('top', '0px');
}
});
}
});
Is it possible to combine the two instances? So if its shorter stay relative till the sidebar reaches the bottom, then act as it is now if the sidebar is longer?
The code works just as intended. This is actually a conceptual problem.
Picture how it would work first. The way you described it working seems to be exactly how it's working in your demo. When the sidebar is longer than the page, the scrolling page reaches the bottom of the sidebar before the leftsidebarfixed is added. That would be impossible with a shorter sidebar.
You may want to consider fixing the sidebar to the top, instead of the bottom (as most websites with sticky sidebars do) or having a taller header, so that the sidebar starts at the bottom.
I'm working on this site (http://styleguide.co/medhelp/) that has 5 sections. For one of the sections (Styles), I've got a sidenav I'm trying to get to stick in the visible frame only as long as users are scrolling in that section.
Here's what I've done thus far - I'm telling the section title & sidenav to stick after the top of the section has begun:
$(window).scroll(function(event) {
var sw = $('.fixed'),
pg = $('.styles'),
diff = pg[0].offsetTop - window.pageYOffset;
if (diff < 80 ) {
$('.fixed').css('position', 'fixed');
$('.fixed').css('top', '160px');
$('.styles').css('position', 'fixed');
$('.styles').css('top', '70px');
}
else {
$('.fixed').css('position', 'relative');
$('.fixed').css('top', '0px');
$('.styles').css('position', 'relative');
$('.styles').css('top', '0px');
}
});
I can't seem to figure out a good way to make the section title "Style" and the sidenav appear/disappear while I scroll to/from that section. Any advice? What could I do better? A simple solution demo in jsfiddle would really help!
Please click on this link & scroll down/up to know what I'm referring to: http://styleguide.co/medhelp/
I'm not going to give you a fiddle, but you need to determine when the next section would stick based on its offset from the top. At the moment what you are doing is:
// if difference top and element < 80 -> fix to top, else position is relative
First of all this means the condition will never be undone. What you need to do in order to continue is:
// once next contact section comes into screen
//(offset from the top of the screen <= screen height), give
var winHeight = $(window).height();
var calcTop = 80 - (winHeight - (winHeight - $('#nextSelector').offset().top);
$('.fixed').css('top', calcTop);
This will give the illusion of your text scrolling up as the new section comes up. I hope this helps. Also, when scrolling back up it doesn't re-stick, but you probably are aware of that.
Let me start of by saying, I'm just now learning JS and Jquery, so my knowledge is very limited.
I've been looking around for 2 days now, and tried all sorts of combinations. But I just can't get this to work.
Below is an example of the layout
I'm looking for a way to trigger an event when div 1 is X px from the top of the screen. Or when div 1 collides with div 2.
What I'm trying to accomplish is to change the css of div 2 (the fixed menu) when div 1 is (in this case) 100px from the top of screen (browser window). Alternatively, when div1 passes div2 (I'm using responsive design, so the fixed height from top might become a problem on smaller screens right? Seeing as the header for example won't be there on a hand held.). So maybe collision detection is better here? Would really appreciate some thoughts and input on this matter.
Another issue is, div2 has to revert back to is previous css once div1 passes it (going back (beyond the 100px)).
This is what I have but it has no effect
$(document).ready(function() {
var content = $('#div1');
var top = $('#div2');
$(window).on('scroll', function() {
if(content.offset().top <= 100) {
top.css({'opacity': 0.8});
}else{
top.css({'opacity': 1});
}
});
});
I am not sure of the reason but $("#content").offset().top was giving a constant value on console. So I added window.scrollTOp() to check its distance from top, here is how it works,
$(document).ready(function() {
var top = $("#menu");
$(window).on('scroll', function(){
if(($('#content').offset().top - $(window).scrollTop()) <= 100){
top.css({'opacity': 0.4});
}else{
top.css({'opacity': 1});
}
});
});
And DEMO JSFIDDLE....
Here is the fiddle I'm working with: http://jsfiddle.net/fz5Yk/5/
As you can see, it has a one-page scrolling navigation. I want to achieve a highlighting effect (preferably using .animate function) to the headings in <strong> </strong> tags when scrolling to a section. Just scroll the page manually and you will see a highlighting in the navigation menu; item of the scrolled section, but I can't quite resolve the js codes in order to apply the same to the headings, and an intervention in it with .animate function seems much more difficult to me. Can you help me?
The plugin-page seems well-documented; https://github.com/davist11/jQuery-One-Page-Nav.
Just put an animation on the location you scroll to inside the end: definition;
$('#nav').onePageNav({
end: function() {
//I get fired when the animation is ending
}
});
Test update
$(window).scroll(function() {
var visible_start = window.pageYOffset;
var window_height = window.innerHeight;
var section3_height = $('#section-3').height();
var section3_start = $('#section-3')[0].offsetTop;
if ((visible_start - window_height >= section3_start) &&
$('#section-3').css('background-color', 'yellow');
}
});