The global setTimeout() method sets a timer which executes a function or specified piece of code once the timer expires. When you provide a value of 0 as the second argument to setTimeout(), the function is queued for execution as soon as the ongoing thread completes, but prior to processing any pending events in the event queue.
This approach is called a "zero-delay timeout" or a "deferred function." It proves beneficial in scenarios where delaying the execution of a function until the current thread finishes is necessary, without causing browser blocking or unresponsiveness in the user interface.
Here's an example of using setTimeout() with a delay of 0 to schedule a function to be executed:
setTimeout(function() {
console.log("zero seconds!’);
}, 0);
It's important to note that using a zero-delay timeout doesn't guarantee that the function will be executed immediately. The function will be executed as soon as possible, but it may still have to wait for other events in the queue to be handled first. Additionally, the behavior of zero-delay timeouts can vary between different browsers and platforms, so it's important to test your code thoroughly to ensure it works as expected.