I have a position:fixed div that serves as a container for a top menu. I want the following div, which is the container for the rest of the contents, to be placed exactly after the fixed div, to avoid content being hidden under the top div, but also avoid some sort of "blank space" between them.
The basic workaround this is setting a fixed "margin-top" value, but i was wondering if it's possible to set the contents container "margin-top" value to the height of the fixed top menu div using CSS, or is it preferable to do it with JavaScript?
Here's the basic layout example:
<div id="divTopFixed" style="width: 100%; position: fixed; top: 0px;">Some DIVs<br>That create variable height</div>
<div style="margin-top: 40px; width:100%;">CONTENTS<br>...</div>
And a JSFiddle: http://jsfiddle.net/zzcbajtz/
Setting margin-top to a fixed value is usually the right way to go about this.
If you're not sure about the height of the fixed top menu or it changes dynamically based on contents, you can use JavaScript/DOM events to adapt the margin value dynamically (e.g. in case the menu changes height when you resize the window, you could watch for the resize event and adjust the margin value).
I've updated the JSFiddle to show an example of how to tap into the resize event and set the margin by querying the offsetHeight of the fixed element: http://jsfiddle.net/zzcbajtz/2/
window.addEventListener('resize', (function resize(){
document.getElementById('the_div').style.marginTop =
document.getElementById('divTopFixed').offsetHeight + 'px';
return resize;
})());
This code fires when the document is loaded and then again whenever the window is resized.
CSS can't calculate complex layouts like this for you, unfortunately. There's some better support for layouts coming in the future (but I think even that doesn't solve the problem you're experiencing here).
Related
Similar question, without a great answer:
How can I include the width of "overflow: auto;" scrollbars in a dynamically sized absolute div?
I have a <div> of fixed height that acts as a menu of buttons of uniform width. Users can add/remove buttons from the menu. When there are more buttons than can fit vertically in the <div>, I want it to become scrollable - so I'm using overflow-y:auto, which indeed adds a scrollbar when the content is too large in y. Unfortunately, when the scrollbar shows up it overlaps the menu buttons, and adds a horizontal scroll bar as a result - the big problem is it just looks horrible.
Is there a "right" way to fix this? I'd love to learn some style trick to make it work right (i.e. the scrollbar sits outside the div rather than inside, or the div automatically expands to accommodate the scroll bar when necessary). If javascript is necessary, that's fine - I'm already using jQuery - in that case, what are the right events are to detect the scrollbar being added/removed, and how do I make sure to use the correct width in a cross-browser/cross-style way?
JSFiddle: http://jsfiddle.net/vAsdJ/
HTML:
<button type="button" id="add">Add a button!</button>
<div id="menu">
</div>
CSS:
#menu{
background:grey;
height:150px;
overflow-y:auto;
float:left;
}
Script:
$('#add').button().click(function(){
var d = $('<div/>');
var b = $('<button type="button">Test</button>');
d.appendTo($('#menu'));
b.button().appendTo(d);
});
First: To remove the horizontal scrollbar set overflow-x: hidden; as Trent Stewart has already mentioned in another answer.
CSS Approach:
One thing I have done in the past is to add a wider wrapping div around the content div to make room for the scrollbar. This, however, only works if your container width is fixed... and may need to be adjusted (by serving different styles) in various browsers due to variable rendering of scrollbars.
Here a jsfiddle for your case. Note the new wrapper <div id="menu-wrap"> and its fixed width width: 95px;. In this case the wrapper div is doing the scrolling.
You could probably also solve this by giving the wrapper some padding on the right, and thereby avoid the fixed width problem.
jQuery Approach:
Another option is to detect the overflow using jquery as described here, and then increasing the width or padding of the div to make space. You may still have to make browser-specific adjustments though.
Here a jsfiddle with a simplified version for your example. This uses your click function to check the div height after every click, and then adds some padding to make room for the scrollbar; a basic comparison between innerHeight and scrollHeight:
if($('#menu').innerHeight() < $('#menu')[0].scrollHeight){
$('#menu').css( "padding", "0 15px 0 0" );
}
To make this more cross-browser friendly you could check for the scrollbar width (as outlined here) and then add the returned value instead of the fixed padding. Here another jsfiddle to demonstrate.
There are probably many other methods, but this is how I would go about it.
Have you tried simply using overflow-x: visible; or hidden
As asked and explained in this question, the problem with the DIV's width set to 100% is that it'll get the window's width and not the enclosed BODY element.
The solution suggested is to place an auxiliary DIV between BODY and the actual DIV and make its width fix. But that just puts the issue to the next level, doesn't it?
Since I don't know the screen size of my users' viewers (let's call it platform independence - a term I've heard somewhere is good to keep in mind when developing for the web, hehe), I need the main-all-mighty-rooted-and-parentest DIV to be filling out all available space without sticking out.
Of course, setting fix width on BODY won't work. Should I go ugly and pull the width of the part of the window that isn't the window, double it (once for each side) and retract that to set the fix width of some root DIV element?!
And if so - how?! I'm unclear on how to obtain the magic width (which, however, might be googleable) but mostly I'm unsure how to enter that parameter into the static CSS file. Will I have to do that dynamically using jQuery and ready function?
Edit
I executed this line from the console.
$("body")[0].outerHTML
The result was as follows - still displaying the scroll bar.
<body style="width: 600px;">
<div id="mapDiv" style="width: 100%; height: 100%; position: absolute;">!</div>
</body>
Then I executed this line.
$("#mapDiv")[0].style.position = ""
Poof, the scroll bar is gone. I thought absolute was the default setting... Apparently it isn't. There's the problem.
Based on your edit if you have that code then you are stretching your body tag to 600px and the <div> inside with absolute position and width 100%.
First the default for position is static.
Since you are using absolute position this happen, is taken off the DOM and search for a new containing block:
The containing block for a positioned box is established by the nearest positioned ancestor
If you don't set the body with any position value then the div is off and takes values in relation to another parent in this case is the window or <html> tag.
Then if you inspect the element is with the dimensions of html tag but positioned where he was in this example http://jsfiddle.net/wZ57C/. Is causing scroll because has 100% dimensions but positioned where body begins wich is at margin 8px aprox. Here you solve the scroll just adding position top:0 left:0 check here http://jsfiddle.net/wZ57C/1/.
But if you want the div be 100% of the body and position:absolute then make the body the relative parent http://jsfiddle.net/wZ57C/2/.
I am currently trying to position an element in a way that it always is at the bottom of it's parent. What's special here is that none of the heights or widths are known. I'd like to do this without tables, if at all possible (my superior is against using those. In a very religious way).
I tried the approach of using position:relative on the parent and position:absolute; bottom:0; on the box I want to have at the bottom. This, however, causes the box to overlap with the other content of the parent div since absolute positioning causes the parent to ignore the height of the positioned element. Some JavaScript is used to align the heights of the floating divs to each other. But disabled JavaScript should not completely break the layout (as in: cause content to overlap or break the "flow" of the page).
Here's the fiddle with the exact structure of my markup: http://jsfiddle.net/vbeC2/27/
I did read the "float: bottom" question on SO, but none of the answers really adressed my problem, hence the new question.
It's not the cleanest solution, but since you were already using the maxHeight bit to calculate the sizes, I just added a second each loop to check the max-height of the bottom section, and added it, so that the relative, absolute positioning would work.
http://jsfiddle.net/robsterlini/svcGB/ or http://codepen.io/robsterlini/pen/BcDyt
EDIT When you resize your browser it won't work, but you could just add a resize event that recalculated it, and you'd need to think about creating some javascript-less fallbacks, either using modernizr, or just some simple
Please find the working demo here: JS Enabled
Modified the jquery logic to calculate the height of the maximum height of the container as shown below:
$(document).ready(function(){
//Set the height of the columns to the highest value of all columns
var maxHeight = 0;
$(".same-height").each(function(){
var k = $(this).children('.headline').innerHeight() + $(this).children('.description').innerHeight()+$(this).children('.bottom').innerHeight();
maxHeight = Math.max(maxHeight,k);
});
$(".same-height").css({"height" : maxHeight});
});
If JavaScript is disabled then you should apply different styles as shown in demo here:
JS Disabled
Here is something similar to what you want to atchive but the demo is centering the
http://css-tricks.com/centering-in-the-unknown/
You should use the same trick : using css ::after/::before pseudo classes to set your footer content in your parent div
This is a followup to my question here. I would like to understand why applying position:absolute to the CSS of a div via jQuery fails, while applying it in a static style works. Here are two jsfiddle examples:
Works: http://jsfiddle.net/jasper/Ty6Af/2/
No worky: http://jsfiddle.net/Ty6Af/3/
Note that the only difference between the two is where I apply position:absolute. Vertical centering always works, but horizontal centering does not work when the page loads for the first time. If you manually re-size the window the div will center correctly.
All of my testing has been on Chrome under Ubuntu thus far.
Anyway, I'm just now delving into the world of web development and these are exactly the kinds of 'quirks' that I need to begin understanding.
EDIT:
#Jasper found something interesting. If you make two calls to .css(), first applying position and subsequently applying a margin, it works. I would love to understand why. Here is an example: http://jsfiddle.net/jasper/Ty6Af/5/
So the issue is with how the width of the div is calculated by the browser depending on its position.
If the div is set to position : static (by default) then it's width is 100% of it's parents width and the element is not allowed to move around the page.
If the div is set to position : relative then it's width is 100% of it's parents width but it can be moved around with left.
If the div is set to position : absolute then its width is determined by the actual content of the div, for instance if there is only a 200px wide <span> element within the div then the div will be 200px wide.
You can test these observations by changing the CSS of your jsfiddle to specify position : relative (etc...) and remove the JavaScript that makes the div position : absolute, then use your Developer Tools to inspect the element and it's calculated width.
The problem with your code is that it sets the position : absolute at the same time it sets the margin of the element by using its width/height (which are calculated differently depending on the position of the element).
If you want to set the position of the div in JavaScript then you can do something like this:
$(function() {
//notice I cached the selector so it can be used in the future as well as set the position of the div
$signuparea = $('#signuparea').css({position : 'absolute'});
$(window).resize(function() {
$signuparea.css({
'margin-top' : '-' + Math.round($signuparea.height() / 2) + 'px',
'margin-left' : '-' + Math.round($signuparea.width() / 2) + 'px',
});
}).trigger('resize');
});
Here's a jsfiddle: http://jsfiddle.net/jasper/Ty6Af/8/
I believe the problem is that when you apply your left and right in your second fiddle, you have yet to add position absolute to the div. Hence, the browser has no idea what do with the left and right values and ignores them initially.
Practically speaking in your second fiddle, you only actually add the position:absolute on the resize trigger. So before you resize your actual div has no positioning.
If you instead add the position absolute on load it works fine:http://jsfiddle.net/Ty6Af/9/
Notice that if you give it position:relative from the start (like this http://jsfiddle.net/Ty6Af/11/ ) it allready applies both the left and right value. The reason you can't actually see the effect of "left" is because it is a block element.
I hope that answers your question, I'm not quite clear on where you are stuck.
http://jsfiddle.net/Ty6Af/7/ this should work, the trigger function in jquery has bugs with chrome so you have to run the function on load too.
The problem seems to be that position:absolute; negates the current layout and requires you to position it.....
See: http://jsfiddle.net/ZHaRD/
Which Jasper explains much more eloquently than myself!
I am using JQuery Tools Scrollable to build a full-page-width scrollable form, such that each page of the form scrolls all the way across the page, replaced by the next page sliding in from the right.
The problem I'm having is how to center each page such that it stays centered amidst browser resizing and in-browser zooming (Ctrl +/-). My code is based upon: http://flowplayer.org/tools/demos/scrollable/site-navigation.html
I've tried encasing my code in a div like this:
<div style="margin-left:-440px; padding-left:50%; width:50%; min-width:880px;">
But, because this div is itself positioned in the middle of the page, the scrolling pages don't slide all the way to the left edge - they cut out at the div's edge about 30% away from left, which looks bad.
The only conclusion I can think of is to dynamically alter the margin-left I've defined on div class="items" to make sure it's always equal to 50% - 440px but no less than 0.
How can I do this using javascript?
is the container div absolute or relative positioned? If it has a specific width, let's say "800px", then centering it horizontally is easy with auto margins on left and right, e.g. margin: 0 auto. Otherwise it gets tricker.
If you want to respond to resize in Javascript, in jquery I do something like $(window).resize(function() {}) (docs here) and inside of the handler function update some value in CSS. If you just want to increase the width but still have auto-margins, you could select your div and update the width property, e.g. $('.mydiv').css('width', '900px');. This would fire any time the window is resized.