Glossary term
What is callback (Callback function)?
callback stands for Callback function.
A function you hand to someone else to call later — when a timer fires, a click happens or a request finishes.
Learn it properly · JavaScript CoreLesson 12: First-Class Functions, Callbacks and Event ListenersFunctions as values: passing them as arguments, returning them from other functions, sync vs async callbacks stepped side by side, and attaching and removing event listeners without leaking memory.