What Is Callback Function In Node JS? Node. js, being an asynchronous platform, doesn’t wait around for things like file I/O to finish – Node. js uses callbacks. A callback is a function called at the completion of a given task; this prevents any blocking, and allows other code to be run in the meantime.
What Is An Error First Callback In NodeJS? Error-First Callback in Node. js is a function which either returns an error object or any successful data returned by the function. The first argument in the function is reserved for the error object. If any error has occurred during the execution of the function, it will
What Is Mean By Call Back? 1. To call (someone or some place) on the telephone again, usually after failing to reach the desired person the first time. … To return someone’s or some organization’s telephone call. What is another word for call back? In this page you can discover 22 synonyms, antonyms, idiomatic expressions,