Create a Playground Using HTML 5

Manish Singh
May 19, 2012
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Introduction

This is a simple application for beginners that shows how to create a playground using HTML 5 and CSS tools. We know that HTML 5 is the advanced version of HTML. Basically HTML 5 can be used to develop 3D applications. This article is intended to help with the use of HTML5 tools to develop playground applications. CSS is the acronym for Cascading Style Sheet that is used for design. CSS defines how HTML elements are to be displayed. Canvas is an important tag of a HTML 5 that is used to show the image and text in a HTML 5 application. I hope this article helps to create playground applications using HTML 5 and CSS tools.

Step 1 : First open a HTML editor such as Notepad.

Open start->Notepad.
The name of editor is "Demo".

Step 2 : Create a Folder on a desktop.

Right-click on desktop->new->Folder.
Name of folder is "Tom".

Step 3 : Open Visual Studio.

Go to file -> New->Projects.
Crete an ASP. NET Web Application.
Name of "Goodies.aspx".

Step 4 : Add a HTML file to your web application.

Right-click on Solution Explorer.
Add->add new item->HTML form.
The Name of the HTML form is "Play.html".

Step 5 : Now in this step we add a CSS file that sets all properties of a canvas body. Through CSS we set color, size and font properties of a canvas body.

Code

body
{

background: #333;
color:Lime;

font: 300 100.1% "Helvetica Neue";

}

#holder
{

height: 480px;

left: 50%;

margin: -240px 0 0 -320px;

position:relative;

top: 50%;

width: 640px;

}

#copy
{
bottom: 0;

font: 300 .7em "Helvetica Neue";

position:relative;

right: 1em;

text-align: right;

}

#copy a
{

color:Green;

}

Step 6 : Now in this step we apply the style of playground.

Code

   body
   {
   margin: 0;
   padding: 0;
   text-align: center;
   }
h1 {
   font-weight: 400;
    height: 10%;
    }
#canvas
   {
   height: 732px;
   margin:20 auto;
   text-align:center;
   width: 1015px;
   background-color:Green;
       }
#code

     {
   font-family: "Lucida Console", monospace;
   height: 4em;
   margin: 10px;
   padding: 0;
   width: 90%;
       }
#run

    {
   font-size: 2em;
       }
</style>

Step 7 : Add a JavaScript file to the application. The T1.js file provides the functionality of dynamically move a playground. Set a D1.css that sets color, size and font properties of a playground body.

Code

body.............gif

Step 8 : Now in this step we define an onclick function that is used when the circle is clicked to perform an action.

Code

Step 9 : The complete code of the application is given below.

Code

<html>

<head>
<title>Tom application</title>

body
   {
   margin: 0;
   padding: 0;
   text-align: center;
     }
   h1
{
   font-weight: 400;
    height: 10%;
    }
#canvas
   {
   height: 732px;
   margin:20 auto;
   text-align:center;
   width: 1015px;
   background-color:Green;
       }
#code

     {
   font-family: "Lucida Console", monospace;
   height: 4em;
   margin: 10px;
   padding: 0;
   width: 90%;
       }
#run

    {
   font-size: 2em;
       }
</style>

window.onload = function ()
{

var ctx = Raphael("canvas", 640, 480),

btn = document.getElementById("run"),

cd = document.getElementById("code");

(btn.onclick = function ()
    {
    ctx.clear();
    ctx.rect(0, 0, 640, 480, 10).attr({ fill: "#66ff99", stroke: "none" });
   try
   {
     (new Function("ctx", "window", "document", cd.value)).call(ctx, ctx);
        }
   catch (e)
   {
  alert(e.message || e);
}
</script>
</head>
<body>
<h1>Developed Playground Using HTML5</h1>
<div id="canvas" style="background-color: #8080FF"></div>
</body>
</html>

Step 10 : Press Ctrl + F5 to run the application in a browser.