Question

clientWidth reports an error with div's

Asked by: andre72

Hi,

in a JavaScript function I need to get the width of a div container to calculate the width of an other one.
It works fine at all but when I startmy project I ever get an error message - however, the result is correct.
As I'm a novice with JS I hope somebody here can help me to make it crossbrowser able ...

Thanks,

Andre

var divLeft = document.getElementById("divLeft"); // get div container
var divLeftScroll = document.getElementById("divLeftScroll"); // get div container
var padding = 10;
 
divLeftScroll.style.width = divLeft.clientWidth - padding + "px";  // get error here

                                  
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Asked On
2009-08-07 at 01:58:20ID24634151
Tags

HTML

,

CSS

,

JavaScript

,

DOM

Topics

Document Object Model

,

Hypertext Markup Language (HTML)

,

JavaScript

Participating Experts
1
Points
500
Comments
7

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Answers

 

by: mplungjanPosted on 2009-08-07 at 02:07:46ID: 25040966

since I cannot see if you call your code after the elements on the page exists, I can only guess your error might be


divLeftScroll.style.width = (divLeft.clientWidth - padding) + "px";  // add the px after calculation

 

by: andre72Posted on 2009-08-07 at 02:23:51ID: 25041026

No that doesn't solve the problem.
I can set a breakpoint to the line after this one and can check out that divLeft is an {Object} with clientWidth=250.
divLeftScroll is also type of Object.

To make it more kurrios:
The next line in the code ist divLeftScroll.style.height = divLeft.clientHeight - padding + "px";.

Sample:
divLeftScroll.style.width = divLeft.clientWidth - padding + "px"; // Error
divLeftScroll.style.height = divLeft.clientHeight - padding + "px";

VS stopps at the error and when I continue I get no more errors.

But:
// divLeftScroll.style.width = divLeft.clientWidth - padding + "px"; // no error for sure
divLeftScroll.style.height = divLeft.clientHeight - padding + "px"; // Error now in this line

So when I delete this line I get the error at the next one ...

 

by: mplungjanPosted on 2009-08-07 at 02:26:22ID: 25041040

Can you show the actual code in context. Perhaps make a small example to show what the issue is?
What is VS? Virtual Studio?

 

by: andre72Posted on 2009-08-07 at 02:43:12ID: 25041133

Yes you're right VS is Visual Studio

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head id="Head1" runat="server">
<!-- Copyright (c) 2008 Jeffrey Bazinet, http://www.vwd-cms.com -->
<title>Example 11: VwdCms Vertical and Horizontal SplitterBars - Full Screen </title>
<script type="text/javascript">
<!-- #include virtual="VwdCmsSplitterBar.js" -->
</script>
<script language="javascript" type="text/javascript"><!--
function splitterOnResize(splitterBar, width)
{
// custom resizing ...
var divOuter = document.getElementById("divOuter");
var divLeft = document.getElementById("divLeft");
var divLeftScroll = document.getElementById("divLeftScroll");
var divTop = document.getElementById("divTop");
var divTopScroll = document.getElementById("divTopScroll");
var tabcontainer1 = document.getElementById("TabContainer1");
var totalWidth = divOuter.clientWidth;
var totalHeight = divOuter.clientHeight;
var padding = 5*2; // scrolling divs have padding of 5px
 
// if the vertical splitter fired this event, resize the right side and reconfigure the horizontal splitter
if ( splitterBar && splitterBar.id == "vsbSplitter" )
{
// make sure the width is in number format
if (typeof width == "string")
{
width = new Number(width.replace("px",""));
}
var test = divLeft.getAttribute("width");
var left = width + splitterBar.splitterWidth;
var rightWidth = totalWidth-left;
divLeftScroll.style.width = divLeft.clientWidth - padding + "px";
divLeftScroll.style.height = divLeft.clientHeight - padding + "px";
divTop.style.left = left + "px";
divTop.style.width = rightWidth + "px";
divTopScroll.style.width = divTop.clientWidth - padding + "px";
divTopScroll.style.height = divTop.clientHeight - padding + "px";
}
else
{
sbar_vsbSplitter.minWidth = 200;
sbar_vsbSplitter.maxWidth = totalWidth-600;
divLeft.style.height = totalHeight + "px";
divLeftScroll.style.width = divLeft.clientWidth - padding + "px";
divLeftScroll.style.height = divLeft.clientHeight - padding + "px";
divTop.style.left = divLeft.clientWidth + sbar_vsbSplitter.splitterWidth + "px";
divTop.style.width = (totalWidth - divLeft.clientWidth - sbar_vsbSplitter.splitterWidth) + "px";
divTopScroll.style.width = divTop.clientWidth - padding + "px";
divTopScroll.style.height = divTop.clientHeight - padding + "px";
sbar_vsbSplitter.configure();
}
}
function onPageLoad()
{
var divOuter = document.getElementById("divOuter");
divOuter.onresize = onWindowResize;
splitterOnResize(null, null);
}
function onWindowResize()
{
    splitterOnResize(null, null);
}
// -->
</script>
<style type="text/css">
.divouter{position:absolute;left:0px;top:0px;width:100%;height:100%;margin:0px;padding:0px;}
.divleft{position:absolute;left:0px;top:0px;background-color:Gray;width:250px;height:300px;overflow:hidden;}
.divtop{position:absolute;left:106px;top:0px;width:300px;height:100%;overflow:hidden;background-color:Gray;}
.divscroll{width:100%;height:100%;overflow:auto;padding:5px;}
</style>
</head>
<body style="margin:0px;padding:0px;overflow:hidden;background-color:Gray;" onload="onPageLoad();" scroll="no">
<div id="divOuter" class="divouter">
<form id="form1" runat="server">
<div id="divLeft" class="divleft"><div id="divLeftScroll" class="divscroll">
</div></div>
<div id="divTop" class="divtop"><div id="divTopScroll" class="divscroll">
 
</div></div>
<VwdCms:SplitterBar runat="server" ID="vsbSplitter" Orientation="vertical"
OnResize="splitterOnResize" LeftResizeTargets="divLeft" MinWidth="200"
BackgroundColor="lightsteelblue" BackgroundColorLimit="firebrick" BackgroundColorHilite="steelblue"
BackgroundColorResizing="purple" SaveWidthToElement="txtWidth"
style="background-image:url(vsplitter.gif);background-position:center center;background-repeat:no-repeat;"/>
</form>
</div>
</body>
</html>
                                              
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Select allOpen in new window

 

by: andre72Posted on 2009-08-07 at 02:51:58ID: 25041179

Also needed the JS include...

 

by: mplungjanPosted on 2009-08-07 at 04:14:30ID: 25041530

Sorry. I do not know what oto do with VwdCms:SplitterBar
Can you post the actual HTML produced?

Alternatively load it into firefox and look in the Js console.

 

by: andre72Posted on 2009-09-21 at 00:00:27ID: 31612798

I think Visual Studio is just a little bit confused - somethimes it report an error and somethimes not ... In the browser is no JS error reported so I think nothing more to do here ...

20120131-EE-VQP-002

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