Solved

Moving box from right to left in jQuey

Posted on 2011-09-08
7
245 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
  • 3
  • 2
  • 2
7 Comments
 
LVL 19

Accepted Solution

by:
Albert Van Halen earned 500 total points
Comment Utility
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
Comment Utility
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
Comment Utility
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
What Security Threats Are You Missing?

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

 

Author Comment

by:WhyDidntItWork
Comment Utility
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
Comment Utility
did you change the jquery script url? Since i tried this on IE8, and Chrome6 and it worked
0
 

Author Comment

by:WhyDidntItWork
Comment Utility
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
Comment Utility
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

What Is Threat Intelligence?

Threat intelligence is often discussed, but rarely understood. Starting with a precise definition, along with clear business goals, is essential.

Join & Write a Comment

In Part 1 (http://www.experts-exchange.com/Programming/Languages/Scripting/JavaScript/A_7849-Hex-Maze.html) we covered the hexagonal maze basics -- how the cells are represented in a JavaScript array and how the maze is displayed.  In this part, we'…
JavaScript can be used in a browser to change parts of a webpage dynamically. It begins with the following pattern: If condition W is true, do thing X to target Y after event Z. Below are some tips and tricks to help you get started with JavaScript …
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…

771 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

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now