Callback

Definitions

1. A function passed to another function or system to be invoked later in response to an event, completion, or decision point. Callbacks are a foundational control-flow mechanism in asynchronous and event-driven code, though deeply nested callback chains can become hard to maintain.

   In plain English: A function given to something else to run later when needed.

   Example: "The old uploader used a callback after each chunk write, but the refactor replaced the nested chain with awaited promises for clarity."

Related Terms

• Iteration
• Method
• Return Type
• Return Value
• Sequential Execution
• Switch Statement
• Timer
• Try-Catch
• Async Function
• Background Task
• Callback Function
• Chain