59、JavaScript Worker Threads and Mandelbrot Set Visualization

JavaScript Worker Threads and Mandelbrot Set Visualization

1. JavaScript Single - Threaded Nature and Workers

JavaScript is single - threaded. A browser won’t run two event handlers simultaneously, and it won’t trigger a timer while an event handler is running. This means concurrent updates to the application state or the document aren’t possible, and client - side programmers don’t need to deal with concurrent programming. However, client - side JavaScript functions shouldn’t run too long, or they’ll block the event loop and make the browser unresponsive. That’s why functions like fetch() are asynchronous.

Web browsers use the Worker class to relax the single - thread requirement. Worker instances are threa