Introduction to HTML5 APIs such as Geolocation, Local Storage, and Web Workers | Try IDE

// Create a new worker
var worker = new Worker("worker.js");

// Send message to worker
worker.postMessage("Message to worker");

// Receive message from worker
worker.onmessage = function(event) {
    console.log("Message from worker: " + event.data);
};

// Terminate worker
worker.terminate();
Example:
worker.js:

javascript
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// Worker code
self.onmessage = function(event) {
    var message = event.data;
    console.log("Message received in worker: " + message);
    var result = "Processed: " + message.toUpperCase();
    self.postMessage(result);
};
html
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Web Workers Example</title>
</head>
<body>
    <button onclick="startWorker()">Start Worker</button>
    
    <script>
        var worker;