I would like to know how can make make an ELEMENT float according to scroll .
For example , when I scroll down , the element that is position:fixed and left:0 will slowly come down into viewable top left area.
Can this be done using jQuery?
the floating type of menu/bar you are searching for is little old style. Why dont you try something like this
Fixed floating elements
http://jsfiddle.net/dueWG/9/
http://static.jqueryfordesigners.com/demo/fixedfloat.html
There is a jquery plugin
http://plugins.jquery.com/plugin-tags/floating
OR take a look at this tutorial
http://net.tutsplus.com/tutorials/html-css-techniques/creating-a-floating-html-menu-using-jquery-and-css/
if you need your element to follow the scroll relative to your window you can use
position:fixed;
instead of absolute;
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
how to make a div stays in place while scrolled without jquery?
I wanted to make something like the The New Stuff | The Next Big Thing | What's Hot
header part of mashable without using jquery (only javascript)
can someone please help me with this?
Did you try CSS position:fixed with top and left set? It is the only way to make it happen without scripting.
Use this HTML:
<div id="myElement" style="position: absolute">This stays at the top</div>
Javascript:
$(window).scroll(function() {
$('#myElement').css('top', $(this).scrollTop() + "px");
});
It attaches an event to the window's scroll and moves the element down as far as you've scrolled.
You can very well do that using css.
#id_name{position:fixed;top:some_value;left:some_value;}
this will fix the div at the corresponding value you have given for left and top position
You can use the CSS Fixed position :
position:fixed;
And then position the element in relation to the window
left:50px;
top:50px;
This will fix the element in the window 50px from the top left corner.
You can manipulate this in Javascript in the onscroll event if you only want it to occur if they scroll to a certain height.
use css to place a div as fixed so that it will not scroll:
position:fixed
Have a look at the below demo. Hope this help
Js Fiddle Demo
<div class = "hello">
<ul>
<li>Welcome </li>
</ul>
</div>
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
Any idea how make a layout like google plus or facebook. You can see at google plus home as example,
at the beginning, if you scroll the page in the main content, they will scroll together (friend post and sidebar), but when you scroll until the bottom of sidebar (in the right of friend post), that sidebar will stop scrolling , but the another content (friend post) will still scrolling. can explain to me how to make layout like that? sample code or demo will be very help.
Fixed positioning with CSS is a very limited approach. There are a number of ways to do this style of "fixed" areas, many of which have already been given in answers to similar questions on here (try the search above?).
One technique (which many are based on) is like so (in brief)..
Capture the browser's scrolling
Get the position from top of chosen element (x)
Check if the scrolling > x, if so apply a class to the element to fix it to a certain position.
The same will work in reverse, for example:
var target = $('#div-to-stick');
var div_position = target.offset().top;
$(window).scroll(function() {
var y_position = $(window).scrollTop();
if(y_position > div_position) {
target.addClass('fixed');
}
else {
target.removeClass('fixed');
}
}
Note: Depending on how you chose to complete the code above, the page will often "jump" as the div's position is modified. This is not always a (noticeable) problem, but you can consider getting around this by using .before with target.height() and appending a "fake" replacement div with the same height.
Hope this helps.
The new approach with css3 is reduce your effort. use single property to get it.
position:sticky;
here is a article explained it and demo.
article
Demo
You are looking for CSS position:fixed (for the scroll-along sidebar), you can set the location with left:[length], right:[length], top:[length], bottom:[length] and the normal width and height combos
You will need to augment it with a window resize and scroll listener that applies the position:fixed property after the window has scrolled past the top of the sidebar.
Use css property (position:fixed). This will keep the position of the div fixed even if you scroll down or scroll up.
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!