What are web workers and how can I use them?

What are web workers and how can I use them?

Web workers are scripts that run in the background, separate from the main thread of a web application. They allow for parallel processing, which can improve performance by offloading heavy computations.

Can you give me an example of how to create a web worker?

Sure! You can create a web worker by using the Worker constructor. For example: const myWorker = new Worker('worker.js'); This will run the script 'worker.js' in a separate thread.

How do I communicate with the web worker?

You can communicate with a web worker using the postMessage method to send data and the onmessage event to receive data. For example, myWorker.postMessage('Hello Worker!'); and in 'worker.js', you can listen for messages using self.onmessage = function(event) { ... };.

Are there any limitations to using web workers?

Yes, web workers have some limitations. They cannot access the DOM directly, and they have a limited set of APIs available. Also, data passed between the main thread and workers is copied, not shared.