Solved

Moving box from right to left in jQuey

Posted on 2011-09-08
7
250 Views
Last Modified: 2012-05-12
Hi. I'm experimenting with jQuery.

I'm trying to move a 80px x 80px green box from right to left across a webpage using the setInterval method.

Here is the HTML:
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <link href="StyleSheet.css" rel="stylesheet" type="text/css" />
    <script type="text/javascript" src="jquery-1.6.2.js"></script>
    <script type="text/javascript" src="JScript.js"></script>
</head>
<body>
    <form id="form1" runat="server">
    <div class="box">
    
        Go!</div>
    </form>
    
</body>
</html>

Open in new window


Here's the CSS:
.box
{
    
    width: 80px;
    height: 80px;
    background-color: green;
    margin-left: 861px;
}

Open in new window


And here's the jQuery:
$(function () {
    var greenLeft = $('.box').offset().left;
    setInterval(function () {
        $('.box').css('left', --greenLeft);
    }, 200);
});

Open in new window


When I run the webpage, nothing happens. Would it be easier to use the 'animate' method?
0
Comment
Question by:WhyDidntItWork
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2
7 Comments
 
LVL 19

Accepted Solution

by:
Albert Van Halen earned 500 total points
ID: 36504771
Set margin-left style property instead of left style property.
Since the box isn't absolute positioned; setting the style property left doesn't do anything.
$(function () {
    var greenLeft = $('.box').offset().left;
    setInterval(function () {
        $('.box').css('margin-left', --greenLeft);
    }, 200);
});

Open in new window

0
 
LVL 40

Expert Comment

by:gurvinder372
ID: 36505153
why not use animate function of jquery
http://api.jquery.com/animate/
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
	<style>
		.box
		{
			width:80px;
			height:80px;
			position:absolute;
			left:1000px;
			border:1px solid #ccc;
			background-color:pink;
		}
	</style>
	<script src="jquery-1.4.2.min.js"></script>
	<script>
		$(document).ready(function(){
			
			$(".box").animate({"left":"0px"}, "slow");

		});
	</script>
</HEAD>

<BODY>
	<div class="box">Box</div>
</BODY>
</HTML>

Open in new window

0
 

Author Closing Comment

by:WhyDidntItWork
ID: 36505939
Thanks Albert.

It worked like you said it would.

What is the importance of having the box absolute positioned? I'll have to do some digging into that.
0
MS Dynamics Made Instantly Simpler

Make Your Microsoft Dynamics Investment Count  & Drastically Decrease Training Time by Providing Intuitive Step-By-Step WalkThru Tutorials.

 

Author Comment

by:WhyDidntItWork
ID: 36505959
Thanks for trying Gurvinder. I tried your code and variations of it but I couldn't get it to work. All things said, I would prefer the animate method.
0
 
LVL 40

Expert Comment

by:gurvinder372
ID: 36506000
did you change the jquery script url? Since i tried this on IE8, and Chrome6 and it worked
0
 

Author Comment

by:WhyDidntItWork
ID: 36506028
Gurvinder, I take it back. It did work but it didn't give the granular control that I was looking for. Thanks for the suggestion.
0
 
LVL 19

Expert Comment

by:Albert Van Halen
ID: 36506608
You can use the animate method though.
The thing is, you can't really control the speed in some cases.

Animate has the duration property which you can set at "fast", "slow" or a number (which is the duration; the higher the number the longer it takes).
Suppose you want to move an element from left to right of the screen. (what a scenario heh)
It just depends on how wide your screen is how fast the element will move.

Another tip : you might want to stop the 'animation' when the element is at the other side of your screen.
Use clearInterval for that.
$(function () {
    var greenLeft = $('.box').offset().left;
    slide = setInterval(function () {
        if(greenLeft == 0)
            clearInterval(slide);

        $('.box').css('margin-left', --greenLeft);
    }, 200);
});

Open in new window

0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In this article, we'll look how to sort an Array in JavaScript, including the more advanced techniques of sorting a collection of records either ascending or descending on two or more fields. Basic Sorting of Arrays First, let's look at the …
This article discusses how to implement server side field validation and display customized error messages to the client.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question