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Example-3-3-highPrime.html
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Example-3-3-highPrime.html
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<!DOCTYPE HTML>
<html>
<head>
<title>Web Worker: The highest prime number</title>
<!-- Get the latest jQuery code -->
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<meta charset=utf-8 />
</head>
<style>
#actions {
position: fixed;
top: 10px;
background: lightBlue;
padding:8px;
}
h1 {
position: relative;
bottom: 10px;
left: 280px;
}
#status {
position: relative;
font-size: 120%;
background: darkslategrey;
padding: 20px;
border-radius: 20px;
}
article {
position: relative;
color:yellow;
background: darkgray;
padding: 25px;
}
input {
width: 80px;
height: 35px;
font-size: 120%;
}
</style>
<body>
<h1>Web Worker: The highest prime number</h1>
<article>
<h2>The prime numbers</h2>
<output id="result"></output>
<div id="status"></div>
</article>
<div id="actions">
<input type="text" name="upto" id="upto"/>
<button onclick="start()" title="Start the work">Start</button>
<button onclick="stop()" title="Stop the work and go have a drink">Stop</button>
</div>
<script>
var myWorker;
function start() {
console.log("WebWorker: Starting");
myWorker = new Worker("Example-3-4-highPrime.js");
myWorker.addEventListener("message", primeHandler, false);
var maxNum = $('#upto').val();
myWorker.postMessage({'cmd': 'start', 'upto': maxNum});
}
function stop() {
if (myWorker) {
var msg = "<br/>WebWorker: Terminating " + new Date();
console.log(msg);
$('#status').append(msg);
myWorker.terminate();
myWorker = null;
}
}
function primeHandler(event) {
console.log ('got e:'+event.data);
if (is_numeric(event.data)) {
$('#result').append(event.data);
}
else {
// update our status div and remove the " so the text will be clear
$('#status').append(JSON.stringify(event.data).replace(/"/g, "") );
}
}
function is_numeric(input){
return typeof(input)=='number';
}
</script>
</body>
</html>