How web worker works with a practical example

Web workers are JavaScript threads that run in the background, preventing page freezing during heavy computations. They enhance performance for complex web applications, handling large data processing efficiently. To create a web worker, use the Web Workers API, providing a script URL and options. Web workers operate by receiving tasks from the main thread, handling them in the background, and sending the results back. In this example, we build an image compression application using a web worker. The worker compresses images while the main thread remains responsive, allowing the user to interact with the UI and type in a textarea. The ImageList component displays the original and compressed images, their size, and a download option. The Home component initializes the web worker and listens for messages to update the image state. The handleFileChange method handles image file uploads, sends them to the worker for compression, and updates the UI with the compressed image.