In JavaScript, some operations take time to complete, such as fetching data from an API or waiting for a timer. Asynchronous JavaScript allows JavaScript to handle these operations without blocking other work. Let's understand it with simple examples! 1. Synchronous JavaScript Synchronous code runs one line at a time, in order. console . log ( " First " ); console . log ( " Second " ); console . log ( " Third " ); Output: ...