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A method to determined can Scroll in X or Y [duplicate]

What's the fastest way of checking whether an element has scroll bars?
One thing of course is checking whether element is larger than its viewport, which can easily be done by checking these two values:
el.scrollHeight > el.offsetHeight || el.scrollWidth > el.offsetWidth
but that doesn't mean that it has scrollbars as well (so it can actually be scrolled by humans).
Question
How do I check for scrollbars in a 1 cross browser and 2 javascript only (as in no jQuery) way?
Javascript only, because I need as small overhead as possible, because I'd like to write a very fast jQuery selector filter
// check for specific scrollbars
$(":scrollable(x/y/both)")
// check for ANY scrollbar
$(":scrollable")
I suppose I'd have to check for overflow style settings but how do I do that in a cross browser way?
Additional edit
Not only overflow style settings. Checking whether an element has a scrollbar isn't as trivial as it seems. The first formula I've written above works fine when element doesn't have a border, but when it does (especially when border is of considerable width), offset dimension can be larger than scroll dimension but the element can still be scrollable. We actually have to subtract borders from offset dimension to get the actual scrollable viewport of the element and compare that to scroll dimension.
For future reference
:scrollable jQuery selector filter is included in my .scrollintoview() jQuery plugin. Complete code can be found in my blog post if anybody needs it. Even though it didn't provide the actual solution Soumya's code considerably helped me solve the problem. It pointed me in the right direction.

I found this somewhere a couple of weeks ago. It worked for me.
var div = document.getElementById('container_div_id');
var hasHorizontalScrollbar = div.scrollWidth > div.clientWidth;
var hasVerticalScrollbar = div.scrollHeight > div.clientHeight;
/* you'll get true/false */

Try:
For vertical scroll bar
el.scrollHeight > el.clientHeight
For horizontal scrollbar
el.scrollWidth > el.clientWidth
I know this works for IE8 and Firefox 3.6+ at least.

This may seem (or be) a little hackish, but you could test the scrollTop and scrollLeft properties.
If they're greater than 0, you know there are scrollbars. If they're 0, then set them to 1, and test them again to see if you get a result of 1. Then set them back to 0.
Example: http://jsfiddle.net/MxpR6/1/
function hasScroll(el, direction) {
direction = (direction === 'vertical') ? 'scrollTop' : 'scrollLeft';
var result = !! el[direction];
if (!result) {
el[direction] = 1;
result = !!el[direction];
el[direction] = 0;
}
return result;
}
alert('vertical? ' + hasScroll(document.body, 'vertical'));
alert('horizontal? ' + hasScroll(document.body, 'horizontal'));
I believe there's a different property for IE, so I'll update in a minute with that.
EDIT: Appears as though IE may support this property. (I can't test IE right now.)
http://msdn.microsoft.com/en-us/library/ms534618(VS.85).aspx

Here is yet another solution:
As a few people pointed out, simply comparing offsetHeight and scrollHeight is not enough since they differ on elements with overflow hidden, etc., that still don't have scrollbars. So here I'm also checking if overflow is scroll or auto on the computed styles for the element:
var isScrollable = function(node) {
var overflowY = window.getComputedStyle(node)['overflow-y'];
var overflowX = window.getComputedStyle(node)['overflow-x'];
return {
vertical: (overflowY === 'scroll' || overflowY === 'auto') && node.scrollHeight > node.clientHeight,
horizontal: (overflowX === 'scroll' || overflowX === 'auto') && node.scrollWidth > node.clientWidth,
};
}

I maybe a little late to the party, but...
I believe you can detect for scrollbars with e.offsetWidth vs. e.clientWidth. Offset width includes borders and scrollbars, padding and width. Client width includes padding and width. Please see:
https://developer.mozilla.org/en/DOM/element.offsetWidth (second image)
https://developer.mozilla.org/en/DOM/element.clientWidth (second image)
You need to check:
Whether or not the element has overflow set to auto/scroll (including overflowX/Y) using the computed/cascaded/current style.
If the element does have overflow set to auto/scroll. Establish the offsetWidth and clientWidth.
If the clientWidth is less than the offsetWidth - right border (found again through the computed/cascaded/current style), then you know you have a scrollbar.
Do the same for the vertical (offset/clientHeight).
IE7 reports a clientHeight of 0 for some elements (I haven't checked why), therefore you always need the first overflow check.
Hope this helps!

There are several problems in case of checking the existence of scrollbars one of which is that in mac you don't have any visible scrollbar so both all the solutions above wouldn't give you an accurate answer.
So because the browser's rendering isn't very frequent you can check the having scroll with changing scroll and then setting it back:
const hasScrollBar = (element) => {
const {scrollTop} = element;
if(scrollTop > 0) {
return true;
}
element.scrollTop += 10;
if(scrollTop === element.scrollTop) {
return false;
}
// undoing the change
element.scrollTop = scrollTop;
return true;
};

For IE11 (Internet Explorer 11) I had to change the logic to:
// Subtract 3 (a small arbitrary number) to allow for IE reporting a difference of 1 when no scrollbar is present
var hasVerticalScrollbar = div.scrollHeight - 3 > div.clientHeight;
This is because IE reports scrollHeight as 1 larger than clientHeight when no scrollbar is present but approx 9 larger when a scrollbar is present

If you need to know if theres a scrollbar present for the whole webpage and with full browser support you can use this:
const hasScrollbar = document.body.scrollHeight > window.innerHeight
It's important to use window.innerHeight instead of document.body.clientHeight because in some mobile browsers clientHeight will not get the size of the address bar but scrollHeight will, so you get wrong calculations.

Is isn't for horizontal scrollbar it will be of height based calculation something like
element.offsetHeight - element.clientHeight
?
To conclude, for horizontal scrollbars, do height based calculation and for vertical scrollbars vice versa.

Just messing around here as none of the above solutions worked out for me (so far).
I have found some success with comparing a Div's scrollheight against its offsetHeight
var oh = $('#wrapDiv').get(0).offsetHeight;
var sh = $('#wrapDiv').get(0).scrollHeight;
It seems to give me an acurate comparison...so far. Does someone know if this is legitimate?

none of this answers are correct. you have to use this :
var div = document.getElementById('container_div_id');
var hasHorizontalScrollbar = (div.offsetWidth > div.clientWidth);
var hasVerticalScrollbar = (div.offsetHeight > div.clientHeight);

Javascript How to keep DIV in window boundary

Hey I have a "box" div which can move its position based on clicking of arrows. How can I keep the Box from going outside the window's bounds or in other words just go to the borders and not cross the boundaries.
Fiddle provided:
var elementStyle = document.getElementById("divId").style;
JSFiddle

I updated your fiddle basically you need to add checks and if your check doesn't pass then set the new position to 0.
if (newPosition < 0) {
elementStyle.top = 0;
} else {
elementStyle.top = newPosition + px;
}
Fiddle here:
https://jsfiddle.net/8t9cqyqd/7/
for bottom and right the window will keep scrolling. If that's not desirable then you need to get the window size and do the same kind of check and then set the right and bottom positions to the container size minus the size of your moving box. I can update the fiddle for that if you'd like.
updated fiddle to handle the "right" direction:
https://jsfiddle.net/8t9cqyqd/9/

Something along these lines:
var x = $("#divID").position();
if(x.left > $(window).width())
//disable up arrow movement
Just do that for all positions changing out width() with height() for the Y position

How to get the actual width available for content on the browser window?

I'm positioning my elements using JavaScript. In order to do it perfectly I have to get the amount of horizontal space available. Badly, $(window).width() does not take in account the scrollbar width. The result is this:
bad http://dl.dropbox.com/u/62862049/Screenshots/fb.png
Here, "Pagina 1" is contained in a small div that was supposed to align with the right border of the window. Well, it does - literally - ignoring the scrollbar, which covers part of the div, throwing the "1" of "Página 1" to the next line.

use this function
function scrollbar_width() {
var calculation_content = $('<div style="width:50px;height:50px;overflow:hidden;position:absolute;top:-200px;left:-200px;"><div style="height:100px;"></div>');
jQuery('body').append(calculation_content);
var width_one = jQuery('div', calculation_content).innerWidth();
calculation_content.css('overflow-y', 'scroll');
var width_two = jQuery('div', calculation_content).innerWidth();
jQuery(calculation_content).remove();
return (width_one - width_two);
}
now calculate available with
var availableWidth = $(window).width() - scrollbar_width();

This is similar to two previous questions:
how to get innerWidth of an element in jquery WITHOUT scrollbar
and
How to get screen width without (minus) scrollbar?

div centered vertically with specific margin when resize

I really need some help.
I have this test-web: www.sfrpsicologia.com/inicio.html
As you can see, I have centered the green box in the middle of the screen. The problem is that when I resize the height of the window, this box is above the logo and the footer. And what I want is that ALWAYS this div respect the height of the logo and the footer. I need a margin top and bottom that this box never overpass.
Any help please? I dont know much about javascript. I have tried with css styles but as it is positioned absolutely I cant do it.
Thank you very much

Don't use absolute positioning in this case.
You are trying to solve poor design problem with javascript and that's not a good practise.
Use sticky footer approach http://ryanfait.com/resources/footer-stick-to-bottom-of-page/
and overthink your page structure based on that technique.
OK I got what you meant.
Do this , however I don't guarantee it will work because I can't test it on your site but it's supposed to if any obstacles occure you should modify it to work.
I'm useing jQuery you should be familiar with it.
So step 1(get the div) <div id=wrapp> and take it's height
var wrapp = jQuery('#wrapp');
var h = wrapp.outerHeight();
step 2(Set some other variables)
var winH = 0;
var pos = null;
var footerH = 34;
var headerH = 74;
These heights are the elements besides your <div id=wrapp> in your case they might be a few more or less.
var footerH = 34;
var headerH = 74;
The idea is when there's no room for all of them on the screen stop <div id=wrapp> from going upwards.
step 3 (All this is bind to window resize event):
jQuery(window).resize(function(){
winH = jQuery(this).height();
pos = wrapp.position();
if(winH < h + headerH + footerH )
wrapp.css({'top' : pos.top});
else
wrapp.css({'top' : '50%'});
});
Update window height on resize, also get <div id=wrapp> position object
and if(there's no more room according to all the heights you put) fix the top position to current top position of <div id=wrapp> else put it back to percentage.
Here's an example: http://jsfiddle.net/F7mrf/44/
If you got the idea with very little modifications it should work, you'll just have to do the math and put the right numbers, good luck

Scroll a div vertically to a desired position using jQuery

This is a followup question for this:
Scrollpane on the bottom, css is hacky, javascript is hard
I ended up doing the scrolling in the same way explained in the accepted answer.
Now there is a request that one item is selected somehow (eg. as an url parameter or by some javascript calls) I should scroll the pane to the item with the corresponding ID in the scrollpane. Like a link to an anchor () would work!
I want to make a javascript call like this
function scrollTo(id) {
$('#middle').magicallyScrollThatItemWouldBeVisible(itemid);
}
But this is not in jQuery (or at least I don't know of it). So is there a way to make it?
I'll post a simple jsFiddle here:
http://jsfiddle.net/ruisoftware/U6QdQ/4/
Help me write that scrollTo function!
A .animate would be fine too.
UPDATE: If it was not clear I would like it to only align to the left or right side of the panel, it it was overflowed on that side (so the minimum possible amount of scrolling happens)

It's not jQuery, just JavaScript, and I've actually never used it all, so I'm not sure how you would have to mess with it to get it to work in this situation, but there is a scrollIntoView function:
yourElement.scrollIntoView();

Since the elements have a fixed width, you can count the number of elements by using .index() + 1, and animate to this value (after subtracting the container's width).
If you want the element to be centered, use - Math.round(middle.width()/100)*50.
Fiddle: http://jsfiddle.net/U6QdQ/17/
//This code should be run on load / DOMReady
(function($){ //Run on load / DOMReady
$.fn.magicScrollTo = function(){
var middle = $("#middle");
var currentScrollLeft = middle.scrollLeft();
var width = middle.width();
var newScrollLeft = this.offset().left + currentScrollLeft - middle.offset().left;
if(newScrollLeft >= currentScrollLeft && newScrollLeft <= currentScrollLeft + width - this.outerWidth()) return;
if(newScrollLeft > currentScrollLeft){ //If the element is at the right side
newScrollLeft = newScrollLeft - width + this.outerWidth();
}
middle.animate({
scrollLeft: newScrollLeft,
}, 'fast')
}
})(jQuery);
Usage:
//Select the 4rd element, and scroll to it (eq is zero-based):
$('.item').eq(3).magicScrollTo();

Something along these lines would be a good start:
http://jsfiddle.net/vHjJ4/
This will bring the target into the centre of the carousel. I think you will have to add in some extra checks to make sure that it didn't scroll to far, for example if you targeted the first or last element...unless this is built into the scroll function (it might be).

I'm not sure I understand your question exactly, but it sounds like you're asking how to scroll horizontally to the selected item in the bottom pane. If so, try something like this:
//get the position of the element relative to the parent ("middle")
var pos = $("#itemid").position();
if (pos){
$("#middle").scrollLeft(pos.left);
}
From here, you can use the width of middle to center the item if needed.