?
Solved

growing and shrinking div in javascript

Posted on 2009-05-14
6
Medium Priority
?
715 Views
Last Modified: 2012-05-07
Write a simple DHTML page with one centered div, height 200px, width 200px, that is blue, on a white background.
When clicking on the div it should slowly grow to 500px (width) and then shrink to 200px, and repeat this motion until it is clicked again.
Do not use 3rd party JavaScript libraries in your solution.


0
Comment
Question by:SunScreenCert
  • 3
  • 2
6 Comments
 
LVL 3

Assisted Solution

by:GregTSmith
GregTSmith earned 500 total points
ID: 24392844
10 minutes of playing around... of course it will be up to you to make this work in the browsers you need to support, but it's an idea... I've only tested in IE7.
<html>
<head>
<script>
var page = {
  active: false,
  action: null,
  reference: null,
  speed: null, 
  initialize: function () {
    document.onclick = page.onClick;
  },
  onClick: function () {
    var o = event.srcElement;
    if (o.id === 'box') {
      if (page.active) {
        page.action = 'shrink';
        page.active = false;
        page.speed = 20;
      }
      else {
        page.speed = 3;
        page.active = true;
        page.action = 'grow';
        page.reference = setInterval(page.adjust, 25);
      }
    }
  },
  adjust: function () {
    var o = page.find('box'), 
      w = o.style.width || '200px',
      i = parseInt(w.substring(0, w.length - 2), 10);
    switch (page.action) {
      case 'grow':
        i += page.speed;
        if (i >= 500) {
          page.action = 'shrink';
        }
        break;
      case 'shrink':
        i -= page.speed;
        if (i <= 200) {
          page.action = 'grow';
          if (!page.active) {
            clearInterval(page.reference);
          }
        }
        break;
    }
    o.style.width = i + 'px';
  },
  find: function (id) {
    return document.getElementById(id);
  }
}
window.onload = page.initialize;
</script>
<style>
* {
  margin:0;
  padding:0;
}
body {
  margin-top:100px;
  text-align:center;
}
#box {
  background-color:blue;
  height:200px;
  width:200px;
}
</style>
</head>
<body>
<form id="form1">
 
<div id="box"></div>
 
</form>
</body>
</html>

Open in new window

0
 
LVL 20

Expert Comment

by:ddayx10
ID: 24400980
Well if the author is not going to comment on that I will...

Nice effort. Doesn't work cross browser but I still admire your work. I would help out and write one that works cross-browser, but it doesnt seem as though it would be used, and you deserve the points anyway!

:)
0
 
LVL 2

Author Comment

by:SunScreenCert
ID: 24401150
No please help me with the cross browser one
0
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 
LVL 2

Author Comment

by:SunScreenCert
ID: 24425100
hey this is not working
0
 
LVL 2

Author Comment

by:SunScreenCert
ID: 24425292
hey i have firefox and it is not working
0
 
LVL 3

Accepted Solution

by:
GregTSmith earned 500 total points
ID: 24425540
A couple of small tweaks and this works for me in FireFox 3.0.1.
<html>
<head>
<script>
var page = {
  active: false,
  action: null,
  reference: null,
  speed: null, 
  initialize: function () {
    document.onclick = page.onClick;
  },
  onClick: function (e) {
    var o = (e) ? e.target : event.srcElement;
    if (o.id === 'box') {
      if (page.active) {
        page.action = 'shrink';
        page.active = false;
        page.speed = 20;
      }
      else {
        page.speed = 3;
        page.active = true;
        page.action = 'grow';
        page.reference = setInterval(page.adjust, 25);
      }
    }
  },
  adjust: function () {
    var o = page.find('box'), 
      w = o.style.width || '200px',
      i = parseInt(w.substring(0, w.length - 2), 10);
    switch (page.action) {
      case 'grow':
        i += page.speed;
        if (i >= 500) {
          page.action = 'shrink';
        }
        break;
      case 'shrink':
        i -= page.speed;
        if (i <= 200) {
          page.action = 'grow';
          if (!page.active) {
            clearInterval(page.reference);
          }
        }
        break;
    }
    o.style.width = i + 'px';
  },
  find: function (id) {
    return document.getElementById(id);
  }
}
window.onload = page.initialize;
</script>
<style>
* {
  margin:0;
  padding:0;
}
body {
  margin:100px 10px 10px 10px;
  text-align:center;
}
#box {
  background-color:blue;
  height:200px;
  margin:auto;
  width:200px;
}
</style>
</head>
<body>
<form id="form1">
 
<div id="box"></div>
 
</form>
</body>
</html>

Open in new window

0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say 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

International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
This article discusses how to create an extensible mechanism for linked drop downs.
In this tutorial viewers will learn how to position overlapping items using z-index in CSS. They will also learn the restrictions on the z-index property.  Create a new HTML document with an internal stylesheet.: Create a div in CSS and name it Red.…
In this Micro Tutorial viewers will learn how to create a CSS image sprite (In a later tutorial, viewers will learn how to use CSS and HTML to create a navigation menu using this sprite) Open a new Photoshop document with a width of (Icon width)x(N…
Suggested Courses

850 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