What are some examples of using Web Workers in JavaScript?

What are some examples of using Web Workers in JavaScript?

Web Workers allow you to run scripts in background threads. For example, you can use them for image processing or data fetching without blocking the UI.

Can you give me a specific code example?

Sure! Here's a simple example:

// main.js
const worker = new Worker('worker.js');

worker.onmessage = function(event) {
    console.log('Received from worker:', event.data);
};

worker.postMessage('Hello, Worker!');

// worker.js
onmessage = function(event) {
    postMessage('Received: ' + event.data);
};

This code creates a worker that responds to messages.

What are the benefits of using Web Workers?

The main benefits include improved performance by offloading heavy computations, keeping the UI responsive, and better handling of concurrent tasks.

Are there any limitations I should be aware of?

Yes, Web Workers have some limitations, such as not having access to the DOM, limited storage options, and the need for message passing to communicate with the main thread.