This is a simple typing game experimental using jquery. The main criteria here is to understand how to read Keyboard Character Codes and displaying its equivalent Character on to the screen. You may notice so many bugs in the live demo because this program is not implemented fully as we concentrated on important code blocks only.
JavaScript code
The below lines of code will read a keyCode upon pressing a key on the keyboard.
$(document).keydown( function(event)
{
var keycode = event.keyCode;
Screen resolution is read by the following code. Here we are reducing 100px and 200px from width and height as browser occupying some of the space at top and bottom.
var width = screen.width - 100;
var height = screen.height - 200;And the next function is used to Generate a random alphabet between A - Z.
Here the key code values for A - Z are 65 - 90.
Math.random() - used to generate a random number
String.fromCharCode() - is used to convert a key Code into its equivalent Character
// Generating a random number between 65 -90
var k = Math.floor(Math.random() * ( 90 - 65 + 1 )) + 65;
var ch = String.fromCharCode(k);For CSS styling purpose we are generating a random color for every bubble and this is done by the following function
// Generating a random color
function randomColor(){
var color = '';
var values = ['a', 'b', 'c', 'd', 'e', 'f', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0'];
for (c = 0; c < 6; c++) {
no = Math.floor(Math.random() * 15);
color += values[no];
}
return color;
}
});Final Javascript Code
<script type="text/javascript" src="http://ajax.googleapis.com/
ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function()
{
// Getting screen resolutions and positioning the start button
var width = screen.width - 100;
var height = screen.height - 200;
var code = 0;
$('#start').css(
{
"top" : (height/2)+'px',
"left" : (width/2)+'px'
});
$('#start').click( function()
{
$(this).fadeOut('slow');
$('#score').show();
genLetter();
});
// Dealing KeyEvents and fading out matched bubble
$(document).keydown( function(event)
{
var keycode = event.keyCode;
$('.bubb'+keycode).animate(
{
"top" : height+"px", "opacity" : 0
}, 'slow');
$('.bubb'+keycode).fadeOut('slow').hide( 'slow', function()
{
code += 20;
$('#score').html(code);
$(this).remove();
}
);
});
// Generating a random alphabet between A-Z
function genLetter()
{
var color = randomColor();
var k = Math.floor(Math.random() * ( 90 - 65 + 1 )) + 65;
var ch = String.fromCharCode(k);
var top = Math.floor(Math.random() * height );
var left = Math.floor(Math.random() * width );
$('body').append('<span class="bubb bubb'+ k +'" style="left: '+ left +'; top: '+ top +'; background-color:'+ color +'">'+ ch +'</span>');
setTimeout(genLetter, 1000);
}
// Generating a random color
function randomColor()
{
var color = '';
var values = ['a', 'b', 'c', 'd', 'e', 'f', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0'];
for (c = 0; c < 6; c++)
{
no = Math.floor(Math.random() * 15);
color += values[no];
}
return color;
}
});
</script>HTML Code
<body>
<div id="score">0</div>
<div id="start">Start</div>
</body>CSS
body
{
width: 100%;
margin: 0 auto;
padding: 0;
}
.bubb
{
position: absolute;
width:30px;
height: 30px;
font: bold 14px verdana;
background-color: yellow;
text-align: center;
-webkit-border-radius: 20px;
-moz-border-radius: 20px;
vertical-align: middle;
padding: 5px;
}
#score
{
font-size:46px;
top: 25px;
right: 50px;
display: none;
text-align:right;
}
#start
{
width: 50px;
padding: 10px 15px;
text-align: center;
font:bold 15px arial;
background-color: #dedede;
color: #000;
-webkit-border-radius: 6px;
-moz-border-radius: 6px;
position: absolute;
}
#start:hover
{
cursor: pointer;
}
