Javascript Web worker

Web worker is a powerful concept in javascript, which is used to improving performance of applications and it is running as Asynchronously.

A web worker is a JavaScript that runs in the background, independently of other scripts, without affecting the performance of the page.

Usages for real-time:

If you are doing the complex operation in DOM, sometimes you feel like browser freezing or non functional.

Such case you can use Web workers

Coding:

<!DOCTYPE html>

<html>

<body>

<p>Count numbers: <output id="result"></output></p>

<button onclick="startWorker()">Start Worker</button>

<button onclick="stopWorker()">Stop Worker</button>

<p><strong>Note:</strong> Internet Explorer 9 and earlier versions do not support Web Workers.</p>

<script>

var w;

function startWorker() {

if(typeof(Worker) !== "undefined") {

if(typeof(w) == "undefined") {

w = new Worker("demo_workers.js");

// you can add operational code in demo_workers.js

}

w.onmessage = function(event) {

document.getElementById("result").innerHTML = event.data;

};

} else {

document.getElementById("result").innerHTML = "Sorry, your browser does not support Web Workers...";

}

function stopWorker() {

w.terminate();

w = undefined;

}

</script>

</body>

</html>

Note: sending and receiving data in the form of string only.

Once you get string you can parse do the opetations

Mobbiinfo