Dealing with scroll bars and jquery .width() method - javascript

jQuery's .width() method doesn't seem to account for scroll bars. This is problematic for me, since I'd like to set the width of some children to equal the width of their parent. I used jQuery similar to the following:
$('#contentDiv').width($('#containerDiv').width())
In this example, #contentDiv is the element I'd like to size, and I want to set it to have the width of #containerDiv, which is its parent element. My problem is that this cuts off the side of #contentDiv, as seen in this fiddle.
In my actual code, I have several elements that I'm sizing with jQuery, which all need to fit in the scrollable div, so just setting the css of #contentDiv to 100% is not an option. What's the best way of dealing with scroll bar widths of divs in jQuery?

The best solution I found while working around this solution is this:
http://chris-spittles.co.uk/?p=531
jQuery is all powerful and everything but sometimes a small dash of native JS is all you need to render pixel perfect pages... I hope you will find this solution helpful!

UPDATED:
None of the jQuery width-finding methods account for the scroll bar. In my original example, using .innerWidth(true) LOOKS like it works, but only because it returns and object, which causes width to fail and the inner contents size themselves to fit in the available space, because the example wasn't very good. However, it's possible to write a function to compute the available space in a div with a scroll bar in it, which can then be used to position the contents as you wish.
To write that function, I took advantage of the fact that, when a div is appended to a div with a scroll bar in it, it takes up the full available width (i.e. the inner width of the parent minus the width of the scroll bar).
The function looks like this:
function noScrollWidth(div){
var measureDiv = $('<div id="measureDiv">');
div.append(measureDiv);
var width = measureDiv.outerWidth();
measureDiv.remove();
return width
};
I then use this to size my content div:
$('#contentDiv').width(noScrollWidth($('#containerDiv')));
Working fiddle.

Try this:
$('#contentDiv').width($('#containerDiv')[0].clientWidth)
For more information about that solution, see this StackOverflow answer.

Another approach I'd try is setting both elements' box-sizing property to 'border-box', and see whether setting your contentDiv's width to 100% then works the way you want.
Now that fewer projects worry about crufty old browsers anymore, 'border-box' can make things easier to work with. Be sure to test multiple browsers on multiple platforms, though, because I'm not sure they all handle scrollbars the same way.

Related

Weird flicker in jQuery toggle

I have a weird problem and i cant find a solution no matter what i tried.
I have a simple menu that toggles few divs (slide up/down), like this:
<div class="navigation">
<ul class="left">
<li>lorem1</li>
<li>lorem2</li>
<li>lorem3</li>
</ul>
</div>
and a few divs that are being toggled.Pretty simple but there is a lot of code, so i wont paste it here.
Script that makes it work is:
$('.navigation a').click(function() {
var $requested = $(this.getAttribute('href'));
$('.top-drawer').not($requested).slideUp('slow');
$requested.slideToggle('slow')
});
Once the user clicks on the link, the div slides down more than it should, flickers and then it becomes the real height (the height is should be).
Here is a Fiddle. Please be sure to have the "Result" Window at at least 1000+ px wide otherwise it wont work (the error wont be shown).
See my suggestion on this JSFIDDLE
Here an explanation of the changes in there:
The Problem
With all those floating elements inside each .top-drawer jQuery has a lot of issues calculating the height of the div because the elements will move around while sliding up and down.
Suggestion
Switching to inline-block instead. But for that to work with your CSS, particularly with the padding on each .top-drawer, you need to use box-sizing: border-box; on anything that is using padding, inline-block and width with %. If curious you can read about this HERE.
New problem
If you go the route of inline-block (best practice now). You will need to use jQuery 1.8.xx or higher. I noticed in your fiddle you use 1.7.2, which has a bug with border-box that was fixed in versions after that.
Try to understand the code you are using.
This is the way I think jQuery's slideUp(), and slideDown() works; mainly the algorithm changes the height of the element, and display after the height is equal to the height of the element or at "0".
So when you will have your element's position set to relative you will see what you're calling "flickers", specially when you have multiple element at the same position. You will also see these "flickers" when you use fadeIn(), fadeOut() etc, because the display of the element is not instantly set to "none" or anything visible in these cases, but after the animation completes.
Solution:
Set the element's position to absolute. That should solve your issue;
example.

Any way to change the width of an element in real time?

So Im trying to change the width of a specific element in real time. Meaning that as you scale the browser window, the element changes width along with it.
Now, the way im calculating this width is by using another element as a reference point. So i just basically copy the reference element's width and apply it to my own element. However the problem is that this is only applied after every page refresh instead of a real time change.
Im using the following jquery code:
$("#lists ul").css("width", $("#lists").width());
As you can see, the code is pretty simple. #lists ul is the elements whose width I am attempting to change and #lists is the reference element. My question is, is there a way to achieve this effect? or should I use a different approach? thanks for the help!
No need to use JavaScript to adjust widths. This should be all you need:
#lists ul { width: 100%; }
What you're trying to do sounds crazy. As others have pointed out, using a percentage in CSS is probably much smarter.
If you insist on doing it this way though... I'm guessing your event is firing within $(document).ready(). Instead, try this.
$(window).resize(function(){
$("#lists ul").css("width", $("#lists").width());
});
You can use a combination of JavaScript and CSS. I don't know what your specific needs are, but you can easily set the width of an object like this:
var element=document.getElementById("my_element");
element.style.width=10+"px";// Simple as that.
If you just want to scale your element based on its parent element's size, this is best done with CSS percent width and height.
CSS:
#my_element{
width:20%;
}
Then CSS takes care of all your scaling needs whenever the parent element is resized.
CSS by itself may not look like what you want it to be, but if you make sure to define all applicable CSS properties of your element (like margin, padding, border, etc...) and then bolster the layout with JavaScript, you can do quite a bit.

Getting a div's "scrollWidth" when it has an absolute positioned child-div

I have a problem getting the width of a div's content (of the content, not the div itself).
The usual approach would be Javascript's scrollWidth property, I think.
The problem: within this div, another div is positioned absolute and has a negative right value (-350px). I can't change this (it's a menu, sliding in when you click a button, overlapping other elements. It needs to be positioned like that).
The scrollWidth returns the width of the outer div's content PLUS the negative right-value (in Chrome, didn't test other browsers).
Here's a short example:
/* ... */
http://jsfiddle.net/R4Cs5/12/
But I need the content's width that is accessible by scrollbars.
Any ideas?
Please use Jquery, no plain Javascript.
Thanks in advance.
I see that your jsfiddle doesn't import any jQuery library, while you wanted to use it. Anyway, with jQuery you can use .width to get an element's width see here: jsfiddle.

javascript getelementbyid ... how to 'get' the "html" variable

function allowscroll()
{
if (screen.width<1200){document.getElementById('html').style.cssText='overflow-x: scroll !important;';};
}
<body onLoad="allowscroll();">
hi there, the above code works for any element, e.g. subbing "html" for "wrapper", but how is it possible to edit the css applied to html? Basically, because of overflow:hidden not inheriting in ie7 - which causes a big empty righthand margin and horizontal scrollbar (only in ie7, ie 8 compatibilty), ive set the css to
html {overflow-x:hidden;}
this is the only way to fix it without losing necessary functionality, e.g. overflowed graphics visibilty.
and this is all well and good, however, lower screen resolutions need the horizontal scroll just to see all of the page itself, so I'm attempting to restore the horizontal scrollbar for those users - and restore the big right margin for anyone who happens to be, for example ie7 1024 by 768 - I can live with that (unless anyone happens to have a superdupa solution).
document.getElementById('html').style.cssText='overflow-x: scroll !important;';
So the above code works for editing the CSS of any element, but not the CSS of the html.
I've also tried:
function allowscroll()
{
if (screen.width<1200){document.getElementByName('html').style.cssText='overflow-x: scroll !important;';};
}
and
function allowscroll()
{
if (screen.width<1200){window.style.cssText='overflow-x: scroll !important;';};
}
I would really appreciate any help, - if it helps in seeing the solution, the link where this applies is: delight design, basically, its how to take out:
html {overflow-x:hidden;}
from the css when in lower screen resolutions...
many thanks
Will
There are a bunch of different ways to get the html element:
document.documentElement
document.getElementsByTagName('html')[0]
document.body.parentNode
But in all honesty, there must be a better way. I don't have time right now to track down what exactly happened here, but from what I can tell, adding position:relative to whatever needs the overflow might help.
Try document.getElementsByTagName("html")[0]
Note I just edited the answer as getElementsByTagName returns an array. You want the first element in that array.
Just use the documentElement:
document.documentElement
It has full browser suport.

Fixed Header/Scrollable Table with Variable Width

I realize this question has been asked quite a bit on Stack Overflow; however, after looking through a number of them, I believe my question has one more requirement. I want to transform a regular html table, into a table that can be scrolled both vertically and horizontally, while the the header remains at the top. The width of this table exceeds the width of the page, so I need the headers to move horizontally as the table is scrolled. I would prefer to use a pure CSS method; however, I will use Javascript if necessary. Have yet to find a solution that does all of this.
This solution might work for you depending on the style of your headers. It's pure CSS.
http://salzerdesign.com/blog/?p=191
Why would you not just use a and set a height and width for it allowing overflow. Then just simply place your table in there and you are good to go.
To me that just seems like the most logic and easiest way to go about it...
well you can use JQuery to do this in few lines of code,
you can see my other post to create a table with fix header
and scrollable body
Create Table with scrollable body
after that lets imagine you have one div for the headers with class name = "Top1" and one div for the body with class name = "Top2", you can bind the scroll of one to the other
$('.Top2').bind('scroll', function(){
$(".Top1").scrollLeft($(this).scrollLeft());
});
$('.Top1').bind('scroll', function(){
$(".Top2").scrollLeft($(this).scrollLeft());
});
jsFliddle demo
Here is a good jQuery plugin, working in all browsers! (check out the demo)
The result is a table with a fixed header, scrolling (for the moment..) only vertically, but with a variable width.
I develop this plugin to meet the problem of fixed header + flexible width.
Check it: https://github.com/benjaminleouzon/tablefixedheader

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