Develop Reference

How would I make my Bootstrap navbar "collapse"?

I am trying to replicate the scrolling effect from here: http://www.altisliferpg.com/
I have a feeling that they are using a heavily modified version of Bootstrap Navbar, which I have taken from here: http://www.enjin.com/forums/page/1/m/10826/viewthread/8514993-boot-strap-30-navbar-full-module and have changed it to fit into my specific case.
How would I make it so when you scroll down the page, the bar on the top gets "smaller" and scrolls along with the page as you scroll? Thanks

You can use css transitions for the height, font size and whatever else you want changed. Then simply set a scroll listener, which adds a class to the header so the size changes. Quick (and very ugly) example. jsFiddle
$(window).scroll(function () {
if ($(this).scrollTop()) {
$('#header').addClass('small');
}
else {
$('#header').removeClass('small');
}
});

Maybe you should detect the scroll event of the window, after that, set the position of the navbar to fixed and then, perform the animation. Here's an example of the javascript part and a link see it in action:
$(function(){
var performingDownAnimation = false,
performingUpAnimation = false;
var performScroll = function(){
if($("body").scrollTop() > 0) {
if(performingUpAnimation) {
$('#logo').stop();
performingUpAnimation = false;
}
if(!performingDownAnimation){
$('#navbar').addClass('navbar-fixed');
$('#logo').animate({ 'font-size': "12px" }, 1000, function(){
performingDownAnimation = false;
});
performingDownAnimation = true;
}
}else if($("body").scrollTop() == 0){
if(performingDownAnimation) {
$('#logo').stop();
performingDownAnimation = false;
}
if(!performingUpAnimation){
$('#navbar').removeClass('navbar-fixed');
$('#logo').animate({ 'font-size': "48px" }, 1000, function(){
performingUpAnimation = false;
});
performingUpAnimation = true;
}
}
}
$(document).on('scroll', performScroll);
});
On scroll event and position fixed
I edited my response for adding support for the "up" direction too. About using bootstrap for the animation, I have no idea how to do it, and I think it can't be done, because bootstrap is based mainly on applying CSS classes to different elements. CSS classes are discrete, but you are asking for animating something numerical, as the font-size property is. As much, you could create an animation that looks "staggered".

jQuery - on window scroll run a function without any delay

I have an issue with a jquery function. You can see a working demo here - http://dev.sreejesh.in/menuissue/ . As you can see when the user scrolls down to the page, I have written a jQuery function(which will triger on scroll) to check scroll pixel. When the browser scrolls to a certain pixel(height of the sidemenu block), the Menu block will stay fixed & rest of the content scrolls as normal.
The functionality is working now, however the problem is menublocks makes a jumps when this function runs. I think this is because of the delay in running the function. Hope you guys have any nice trick to fix this.
I used an if/else function to check the scroll pixel, so when the scrolled pixel is greater than menublock height it will add a class "fixed" .
I use the following code.
HTML
<div id="globalwrapper">
<div id="menubar">
---- Menu List items-----
</div>
<div id="mainblock">
----Main content area----
</div>
</div>
jQuery
$(document).ready(function(){
$(window).scroll(function() {
adjustScroll();
});
});
function adjustScroll(){
var windowHeight = $(window).height();
var menublockHeight = $('#menubar').height();
var scrollValue = $(document).scrollTop();
var posValue = menublockHeight - windowHeight;
var menuStatus = $('#menubar').css('left');
$('#menubar').css('minHeight', windowHeight);
$('#menubar').css('height', menublockHeight);
console.log(menuStatus);
$(document).scroll(function() {
if(menuStatus == '0px') {
if(scrollValue > posValue){
$('#menubar').addClass('fixed');
$('#menubar').css('marginTop', -posValue);
}else {
$('#menubar').removeClass('fixed');
$('#menubar').css('marginTop', '0px');
}
}
});
}

I think only CSS can solve this issue, add this style:
#menubar{
position: fixed;
}
just test on Google Chrome,you can have a try.

Push footer to bottom when page is not full

I'm developing a mobile web app. This is the main structure from top to bottom: header div, menu div, content div, footer div. The header, menu and footer are constant and pages are loaded into the content div using ajax.
Some of the pages have lots of content and they fill out the page so scroll is needed. Some of the pages have only one or two lines of content so they leave a big empty part (Not necessarily different pages - one page for example shows a list of orders, you can have no orders and you can have hundreds...).
This is what i want to achieve: If the page is not full with content, the footer will be in the bottom of the page. If the page is full and scroll is needed, the footer will be immediately after the content (so you scroll down the page and in the end you reach the footer).
The sticky footer solutions are not good for me because i don't want the footer to stick to the bottom always, only when the page is not full of content.
Is there anyway to achieve that? Thanks.

Then you have to use javascript for that - calculate the height of the content - substract it from the window height and set the margin-top of the footer from that distance:
jsfiddle
jsfiddle show
HTML
<div id="header" class="header">Header</div>
<div id="content" class="content">Content</div>
<div id="footer" class="footer">Footer</div>
JS (This example uses jQuery, it should be included before this script.)
$('#footer').css('margin-top',
$(document).height()
- ( $('#header').height() + $('#content').height() )
- $('#footer').height()
);
You can put an onresize window that call this function on any resize of the window.
[edit blag :]
Here is the onResize method (but with a min-height and not a margin-top)
Check the JSFiddle
// function to set the height on fly
function autoHeight() {
$('#content').css('min-height', 0);
$('#content').css('min-height', (
$(document).height()
- $('#header').height()
- $('#footer').height()
));
}
// onDocumentReady function bind
$(document).ready(function() {
autoHeight();
});
// onResize bind of the function
$(window).resize(function() {
autoHeight();
});
Borders, padding and margin
If you want to have borders and padding included in the calculation you can use outerHeight() instead of height(). Alternatively outerHeight(true) also includes margins.

A CSS Sticky footer should solve your problem.
Here's an example
That is super easy to setup and use. It will force the footer down the page with the content, and if the content isn't big enough to fill the page it will stick to the bottom.

function autoHeight() {
var h = $(document).height() - $('body').height();
if (h > 0) {
$('#footer').css({
marginTop: h
});
}
}
$(window).on('load', autoHeight);

The following solution works for me, based on the answer from Александр Михайлов. It finds the bottom of the footer and determines if it is less than the document height and uses top margin on the footer to make up the shortfall. This solution might give issues if your content is being resized on the go.
$(function () {
updateFooterPosition();
});
$(window).resize(function () {
updateFooterPosition();
});
function updateFooterPosition() {
var bottomOfFooter = $('footer').offset().top + $('footer').outerHeight(true);
var heightShortage = $(document).height() - bottomOfFooter;
if (heightShortage < 0) heightShortage = 0;
$('footer').css('margin-top', heightShortage);
}

Here's the solution i came to on my project
function autoHeight() {
if ( document.body.clientHeight < window.innerHeight ) {
document.querySelector('#footer').style.position = 'absolute';
document.querySelector('#footer').style.bottom = '0';
}
}
document.addEventListener("DOMContentLoaded", function() {
autoHeight();
});

This solution worked for me. I think this is perfect if you have more than only a #header and #footer. It just push the content down with a padding-bottom if body is smaller than the viewport.
function autoHeight() {
var bodyHeight = $("body").height();
var vwptHeight = $(window).height();
var gap = vwptHeight - bodyHeight;
if (vwptHeight > bodyHeight) {
$("#content").css( "padding-bottom" , gap );
} else {
$("#content").css( "padding-bottom" , "0" );
}
}
$(document).ready(function() {
autoHeight();
});
$(window).resize(function() {
autoHeight();
});

Change div height with buttons

I need some scripting like the TYPO3 extension / module that runs on this site : http://nyati-safari.dk/index.php?id=125 (Scroll to: Detaljeret Dagsprogram (inkluderet)).
The div is shown with a pixelspecific height and when the arrow is clicked the div changes to contentspecific height also the arrow changes when the div toggles.

Do this:
var div = $('#div');
$('#arrow').click(function () {
if (div.height() == 100) {
autoHeight = div.css('height', 'auto').height();
div.height(100).animate({
height: autoHeight
}, 500);
} else {
$('#div').animate({
height: '100'
}, 500);
}
});
JSFiddle: http://jsfiddle.net/ZG8ug/5/
Can even do something like this: http://jsfiddle.net/ZG8ug/6/ where the 'hidden' div is small on page load but when viewed and returned it is bigger. Might be useful to help users distinguish what has already been viewed. Could even do it the other way around too so the div takes up even less space when it has been viewed.

Jquery tabs: autoHeight for expanding content

I am using jquery sliding tabs from this SITE, which work very nice. The only problem is that the autoHeight jquery function does not adjust to expanding content. Rephrase: The tab container will ajust to the height of the inactive content but the issue is that once the content inside container becomes active and expands vertically it will no longer fit and not be seen <--- It fails to adjust to that. Here is the example JSFFIDLE
I try doing this to adjust the height to expanding content but it is not working:
<script>
var height = 50 // Set to the height you want
$('.st_view').css('height', height+'px')
});​
</script>
Overall Jquery
<script>
$(document).ready(function() {
$('div#st_horizontal').slideTabs({
// Options
contentAnim: 'slideH',
autoHeight: true,
contentAnimTime: 600,
contentEasing: 'easeInOutExpo',
tabsAnimTime: 300
});
var height = 50 // Set to the height you want
$('.st_view').css('height', height+'px')
});​
</script>

If it is only togglers that cause the content to expand, you can modify your toggler code like this:
$('#title').click(function() {
$(this).toggleClass('active');
$('#content').toggle();
var $tab = $(this).closest('.st_tab_view');
$tab.closest('.st_view').css('height', $tab.height());
});
For a more general solution, get the jQuery resize plugin, and add this code:
$('.st_tab_view').resize(function() {
var $this = $(this);
$this.closest('.st_view').css('height', $this.height());
});