Understanding Callbacks
Explore how callbacks function as a core part of asynchronous programming in Node.js. Understand their role in managing file operations without blocking the main thread, enabling your code to continue running while waiting for tasks to complete. Practice using callbacks with practical examples like reading and writing files asynchronously.
Imagine you’re baking cookies. Once they’re in the oven, you need to take them out when they’re ready to prevent them from burning. Instead of waiting by the oven, you set a timer and use the time to handle other tasks. When the timer goes off, it reminds you to take out the cookies; this is the action that needs to happen after the timer completes.
In programming, callbacks are like the action of taking the cookies out. They define what needs to happen when an asynchronous task completes. The program, like the timer, can continue running other tasks in the meantime and execute the callback when it’s time to handle the result of the operation. This allows the ...