Navigation fade in after scroll down? - javascript

I would like to get a navigation exactly like this website : http://www.interviewmagazine.com/
A navigation bar appears after scrolling down about 700 pixels or so.. its a fixed nav with fade in effect and has a fade out effect when you scroll back to top.
I tried to see how they did their code but i couldnt figure it out.
sounds like mootools tho?
If someone can help that would be awesome. thanks!

You can create such a menu using jQuery and CSS, swapping classes as needed when:
var posit = window.scrollTop();
if (posit == [your designated fadein location]) {
//do something;
}
CSS: position : fixed, opacity : 0, height : 0; overflow : hidden
swap class to change height to fixed amount
animate({opacity : 1.0}, 'fast', function() {
//callback;
});
You'll have to set a listener for when user scrolls, but this should get you started. All you need is jQuery and a browser, a logical approach to cut the project up into manageable parts, and time.
EDIT: Here's your fiddle.
http://jsfiddle.net/lazerblade01/fNn7K/26/

For anyone searching through stackoverflow here is my try:
$(function(){
// Check the initial Poistion of Sticky Header
var stickyHeaderTop = $('#stickyheader').offset().top;
$(window).scroll(function(){
if( $(window).scrollTop() > stickyHeaderTop ) {
$('#stickyheader').css({position: 'fixed', top: '0px'});
$('#stickyheader').css('opacity', '1');
} else {
$('#stickyheader').css({position: 'static', top: '600px'});
$('#stickyheader').css('opacity', '0');
}
});
});
Here is a Fiddle DEMO http://jsfiddle.net/uFq2k/297/
It is a little modified version of this code: how can I stick the div after scrolling down a little

David Walsh has a thing he calls ScrollSpy - much like twitter's scroll spy - only it does a different thing.
the twitter one can react to a particular element of interest coming into view.
walsh's plugin can react and give you events when a user scrolls to a particular threshold and back.
http://davidwalsh.name/mootools-scrollspy

You could try Twitter's Bootstrap. Check out their second toolbar.

Related

How to make Bootstrap header that changes size on scroll down?

I've seen a few different threads seemingly about this but none of the answers in them have a working solution for me.
Here's what I want:
Big transparent header with a big logo on the top.
Small colored header with a small logo when user has scrolled past the topmost area.
I'm using navbar-fixed-top and and Bootstrap's scrollspy to add and remove certain classes from the header.
Here's why it hasn't worked so far:
$(window).scrollTop() doesn't return anything meaningful at all.
It seems wrong to change at a certain amount of pixels from the top anyway, since it can vary between screen resolutions.
Initiating a change based on what activate.bs.scrollspy captures works rather well except it shows the wrong header when I load the page for the first time.
It seems impossible to place a <div id="whatever"> at a certain spot and have the header change when scrollspy finds it. I've tried making the div 1px in dimension and placed at the absolute top of the page, but the scrollspy still identifies it from way off.
Here's my jQuery code at the moment, which is very imprecise AND shows the wrong header at the first load of the page (remember, you're not always at the top of the page when loading (reloading) the page!).
$(document).ready(function() {
$('body').scrollspy({ target: '.navbar-inverse' });
$('#main-header').on('activate.bs.scrollspy', function () {
var currentItem = $('.nav li.active > a').text();
var header = $('.navbar');
var logosmall = $('.small-brand');
var logobig = $('.big-brand');
if (currentItem == 'top' && header.hasClass('navbar-small')) {
header.removeClass('navbar-small');
header.addClass('navbar-big');
logosmall.css('display', 'none');
logobig.css('display', 'inline-block');
}
else if (currentItem != 'top' && header.hasClass('navbar-big')) {
header.removeClass('navbar-big');
header.addClass('navbar-small');
logobig.css('display', 'none');
logosmall.css('display', 'inline-block');
}
});
});
Wrap your code into window scroll event as mentioned below then only $(window).scrollTop() will work as you expecting.
$(window).scroll(function () {});
Here is a great example of your problem, it is a bit tricky to shrink your navbar but not impossible. You have to take into account a lot of things. I found this a while ago: http://www.bootply.com/109943
It is really strange that $(window).scrollTop() does not return anything by the way. What browser are you on? And your problem with reloading the browser:
$(window).load(function{
//logic to check how far scrolled
})

Change scrollTop offset

I am using bootstrap 3 and have a fullscreen hero unit at the top of my page, below that is my navigation. I have some js which allows my navbar to stick to be fixed at the top after you scroll past the full screen hero. Also some js for my smooth scrolling links.
The problem is the offset is different before you scroll past the full screen hero and after. But it works fine when you are past the jumbotron. I have tried a bunch of different things but I can seem to get this to work exactly.
Check out the fiddle here.
Here is my js for the smooth scrolling links:
$(document).ready(function() {
// navigation click actions
$('.scroll-link').on('click', function(event){
event.preventDefault();
var sectionID = $(this).attr("data-id");
scrollToID('#' + sectionID, 750);
});
// scroll to top action
$('.scroll-top').on('click', function(event) {
event.preventDefault();
$('html, body').animate({scrollTop:0}, 1200);
});
// mobile nav toggle
$('#nav-toggle').on('click', function (event) {
event.preventDefault();
$('#main-nav').toggleClass("open");
});
});
// scroll function
function scrollToID(id, speed){
var offSet = 95;
var targetOffset = $(id).offset().top - offSet;
var mainNav = $('#main-nav');
$('html,body').animate({scrollTop:targetOffset}, speed);
if (mainNav.hasClass("open")) {
mainNav.css("height", "1px").removeClass("in").addClass("collapse");
mainNav.removeClass("open");
}
}
if (typeof console === "undefined") {
console = {
log: function() { }
};
}
By changing var offSet = 95; I am able to adjust the offset but what would be the best way to use 180 before the navbar sticks to the top but 95 when it does?
Also here is the js I am using for my navbar:
$(function () {
/* $(".navbar-fixed-top").css({"top":$(".jumbotron").height()});
$(window).resize(function (e) {
$(".navbar-fixed-top").css({"top":$(".jumbotron").height()});
});*/
$(document).on( 'scroll', function(){
console.log('scroll top : ' + $(window).scrollTop());
if($(window).scrollTop()>=$(".jumbotron").height())
{
$(".navbar").addClass("navbar-fixed-top");
}
if($(window).scrollTop()<$(".jumbotron").height())
{
$(".navbar").removeClass("navbar-fixed-top");
}
});
});
Are you open to angular.js? I have a directive i use for this. As seen here.
I'll grab the plunker link for you. you might find the code helpful.
Essentially you need to create a ghost dom element to take the place of the menu when you pull it to an new layout position.
EDIT: Here it is
I won't suggest grabbing angular just for this. But you can use the basis of the events and logic to build your own solution.
This here is creating an element and placing in its place
$scope.spacer = $element.after(
'<div class="spacer" style="height:' + $element[0].clientHeight + 'px"> </div>').next();
then this element is removed when the menu is back to its static position.
Inspect the dom and watch how it changes, this will probably help you see the events and changes that need to take place.
EDIT 2 SOLUTION:
HERE is the concepts applied to your JSFiddle
It's not the best solution but by adding margin: 0 0 -100px 0; to your .navbaryou lose the spacing issue.
Also you're getting 22 console errors because of missing images. I'm not saying that this is causing any major problems but you would be better off losing them.
The problem is that when you have not scrolled past the hero, navigation is still part of the layout and pushes content bellow it a little lower. When you scroll past (either manually or via a script) the hero, navigation is removed and fix positioned. That makes everything which was bellow to "jump up" exactly of the navigation height.
That means if portfolio was 1000px from the top, on click you say: go 1000px from top; but then porfolio moves 100px up (as explained above) meaning it is now 900px from the top while the window scrolled 1000px as you asked.
When you have scrolled past the hero, nothing changes its position.

How to slowly move header while user scrolls the page?

I want to achieve the effect that is used on this Header on this example website:
http://anchorage-theme.pixelunion.net/
You will notice that as you scroll the page, the header slowly moves upward until it disappears from view. I want to achieve this same effect. I believe it will need some JS and CSS positioning but still have no clue how to achieve this. Is this done with parallax scrolling?
Would appreciate if someone could give me a quick example of the code used to do this with a element. So I can then use it on my own site.
Cheers.
the $(window).scroll(function () {...}) is the one you need here
$(document).scrollTop() is the amount of scrolled distance from the top
Use this:
$(window).scroll(function(){
if ($(this).scrollTop() > x){ // x should be from where you want this to happen from top//
//make CSS changes here
}
else{
//back to default styles
}
});

JQuery create a scroll follow div

ok I have seen people using position:fixed to have a div follow the scroll.
I have also seen the following solution which is good ( Jquery follow scroll ) but I was wondering how I can accomplish 2 effects :
create a smooth scroll for the box
scroll the box inside a div (so if the scroll is higher than the holder div, the box should be on top of the div, and when you scroll down it should scroll inside)
an example of these features can be found here : http://www.limestonenetworks.com/dedicated_servers/order.html?id=47
but I cant figure out what they used and even if they used a library.
As a slight alternative to Adam Hutchinson's
http://jsfiddle.net/HelloJoe/JjuQu/
It's pretty self explanatory but just say if you need anything explained.
This div in the example is not polsition:fixed, or absolute. What they do is to animate the margint-top attribute on scroll relatively
Looks like you need to map an event to the document scrolling and then move a div relative to the scroll. Something along these lines may give you somewhere to start.
$(document).scroll(function(){
$('#divtomove').css('top', $(document).scrollTop());
})
Also, this is the code in the example page, just to get an idea
var $scrollingDiv = $("#customize");
$(window).scroll(function () {
if ($(window).scrollTop() > 490) {
if (($("#maincontentbox").height() - $(window).scrollTop()) > 0) {
$scrollingDiv.stop().animate({
"marginTop": ($(window).scrollTop() - 500) + "px"
}, "slow");
}
} else {
$scrollingDiv.stop().animate({
"marginTop": "0px"
}, "slow");
}
});
Simpler solution:
$('#divtomove').scrollFollow();

JQuery UI Tabs Causing Screen to "Jump"

I'm using the latest version of the jQuery UI tabs. I have tabs positioned toward the bottom of the page.
Every time I click a tab, the screen jumps toward the top.
How can I prevent this from happening?
Please see this example:
http://5bosses.com/examples/tabs/sample_tabs.html
If you're animating your tab transitions (ie. .tabs({ fx: { opacity: 'toggle' } });), then here's what's happening:
In most cases, the jumping isn't caused by the browser following the '#' link. The page jumps because at the midpoint of the animation between the two tab panes, both tab panes are fully transparent and hidden (as in display: none), so the effective height of the whole tabbed section becomes momentarily zero.
And if a zero-height tabbed section causes the page to be shorter, then the page will appear to jump up to compensate, when in reality it's simply resizing to fit the (momentarily) shorter content. Makes sense?
The best way to fix this is to set a fixed height for the tabbed section. If this is undesirable (because your tab content varies in height), then use this instead:
jQuery('#tabs').tabs({
fx: { opacity: 'toggle' },
select: function(event, ui) {
jQuery(this).css('height', jQuery(this).height());
jQuery(this).css('overflow', 'hidden');
},
show: function(event, ui) {
jQuery(this).css('height', 'auto');
jQuery(this).css('overflow', 'visible');
}
});
It will set the computed height of the pane before the tab transition. Once the new tab has appeared, the height is set back to 'auto'. Overflow is set to 'hidden' to prevent content from breaking out of the pane when going from a short tab to a taller one.
This is what worked for me. Hope this helps.
If you have something along these lines:
Tab 1
Try adding return false; after the tab activation command:
Tab 1
My guess is that you are animating your tab transitions? I am having the same problem, where the page scroll jumps back to the top with every click.
I found this in the jquery source:
// Show a tab, animation prevents browser scrolling to fragment,
Sure enough, if I have this:
$('.tab_container > ul').tabs();
$('.tab_container > ul').tabs({ fx: { height: 'toggle', opacity: 'toggle', duration: 'fast' } });
my code jumps to the top and is annoying (but there's animation). If I change that to this:
$('.tab_container > ul').tabs();
//$('.tab_container > ul').tabs({ fx: { height: 'toggle', opacity: 'toggle', duration: 'fast' } });
there is no tab animation, but switching between tabs is smooth.
I found a way to make it scroll back, but it's not a proper fix, as the browser still jumps to the top after clicking a tab. The scroll happens between the events tabsselect and tabsshow, so the following code jumps back to your tab:
var scroll_to_x = 0;
var scroll_to_y = 0;
$('.ui-tabs-nav').bind('tabsselect', function(event, ui) {
scroll_to_x = window.pageXOffset;
scroll_to_y = window.pageYOffset;
});
$('.ui-tabs-nav').bind('tabsshow', function(event, ui) {
window.scroll(scroll_to_x, scroll_to_y);
});
I'll post any more progress I make.
I was given a solution for this...
How to stop screen from jumping up when tab is clicked:
Wrap the div that contains the tabs in a div with a fixed height.
See example here: http://5bosses.com/examples/tabs/sample_tabs.html
I had the same problem with jquery ui's menu - a preventDefault() on the anchor's click event stops the page from scrolling back to the top:
$("ul.ui-menu li a").click(function(e) {
e.preventDefault();
});
Mike's solution demonstrated the principle greatly but it has a big drawback - if the resultant page is short, the screen will jump to the top anyway! The only solution is to remember the scrollTop, and restore it after the tabs are switched. But before the restoration, enlarge the page (html tag) appropriatelly:
(edit - modified for new Jquery UI API + small improvement for large pages)
$(...).tabs({
beforeActivate: function(event, ui) {
$(this).data('scrollTop', $(window).scrollTop()); // save scrolltop
},
activate: function(event, ui) {
if (!$(this).data('scrollTop')) { // there was no scrolltop before
jQuery('html').css('height', 'auto'); // reset back to auto...
// this may not work on page where originally
// the html tag was of a fixed height...
return;
}
//console.log('activate: scrolltop pred = ' + $(this).data('scrollTop') + ', nyni = ' + $(window).scrollTop());
if ($(window).scrollTop() == $(this).data('scrollTop')) // the scrolltop was not moved
return; // nothing to be done
// scrolltop moved - we need to fix it
var min_height = $(this).data('scrollTop') + $(window).height();
// minimum height the document must have to have that scrollTop
if ($('html').outerHeight() < min_height) { // just a test to be sure
// but this test should be always true
/* be sure to use $('html').height() instead of $(document).height()
because the document height is always >= window height!
Not what you want. And to handle potential html padding, be sure
to use outerHeight instead!
Now enlarge the html tag (unfortunatelly cannot set
$(document).height()) - we want to set min_height
as html's outerHeight:
*/
$('html').height(min_height -
($('html').outerHeight() - $('html').height()));
}
$(window).scrollTop($(this).data('scrollTop')); // finally, set it back
}
});
Works with the fx effect too.
Try using event.preventDefault();. On the click event which is switching the tabs. My function looks like this:
$(function() {
var $tabs = $('#measureTabs').tabs();
$(".btn-contiue").click(function (event) {
event.preventDefault();
$( "#measureTabs" ).tabs( "option", "active", $("#measureTabs").tabs ('option', 'active')+1 );
});
});
Thanks for your help. Good suggestion, but I tried before with no luck. I think JQuery UI may be overriding my efforts.
Here is the code per tab:
<li class=""><span>Two</span></li>
I already tried this with no success:
<li class=""><span>Two</span></li>
Here is a simple example (without return false): http://5bosses.com/examples/tabs/sample_tabs.html
Any other suggestions?
Try just adding a min-height using css to each of the tab content areas ( not the tabs themselves ). That fixed it for me. :)
> var scroll_to_x = 0; var scroll_to_y =
> 0;
> $('.ui-tabs-nav').bind('tabsselect',
> function(event, ui) {
> scroll_to_x = window.pageXOffset;
> scroll_to_y = window.pageYOffset; }); $('.ui-tabs-nav').bind('tabsshow',
> function(event, ui) {
> window.scroll(scroll_to_x, scroll_to_y); });
Thanks for your help! Please let me know what else you find.
The above function works (screen doesn't move permanently)... but, the screen is very wobbly on click.
Here is a simple example showing how clicking a tabs causes the screen to jump toward the top (without the above code):
http://5bosses.com/examples/tabs/sample_tabs.html
Note that there's no animation being used.
I prefer to have an href="#" in my links that do not take the user anywhere, but you can do this as long as you add an onclick="return false;". The key, I guess, is not sending the user to "#", which depending on the browser seems to default as the top of the current page.
There is a much more simple way which I discovered from the comments on this page that is to simply remove the href="#" and it will not jump to the top any more! I verified and it works for me. Cheers
I had such a problem. My code was:
$("#tabs").tabs({
hide: {
effect: "fade",
duration: "500"
},
show: {
effect: "fade",
duration: "500"
}
});
I have simply removed show and it worked like a charm!
$("#tabs").tabs({
hide: {
effect: "fade",
duration: "500"
}
});
I had the same problem, plus mine were rotating on their own so if you were at the bottom of the page, the browser window would be scrolled up tot he top. Having a fixed height for the tab container worked for me. Kind of a weird thing still is that if you leave the window or tab and go back, it will still scroll. Not the end of the world, though.
replace the href="#" with href="javascript:void(0);" in 'a' element
works 100%
I found in my case the tab href=#example1 was causing the page to jump to the position of the id. Adding a fixed height to the tabs made no difference so I just added:
$('.nav-tabs li a').click( function(e) {
e.preventDefault();
});
Did you tryed:
fx: {opacity:'toggle', duration:100}

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