One post tagged with "Promise"

As we all know, JavaScript is a single-threaded language. This means that only one task can be executed at a time. So, if you have a long-running task, it will block the execution of other tasks.

Actually, JavaScript is a single-threaded language, but it has a non-blocking I/O model. This means that JavaScript can perform multiple tasks at the same time. How does JavaScript achieve this? The answer is Event Loop.