What are callback functions for
Posted: Mon Jan 27, 2025 10:38 am
First, callback functions reduce the amount of code written. Without them, the programmer would have to write all the response output options in one function and select them using switch or if/else.
Secondly, JavaScript is an event-oriented programming language. An application written in JS will continue to perform other actions instead of waiting for responses to outgoing requests. Therefore, a callback function was introduced to stop receiving a response until a real response from the API came.
Thirdly, this feature makes the code more readable. It provides crypto email database list flexibility, ease of use and modification of the code in the sequence of actions.
For example, writing code for servers in the Node.js environment is entirely based on asynchronous programming and the use of callback functions.
Examples of callback functions
First, let's look at how functions work without using callbacks.
Secondly, JavaScript is an event-oriented programming language. An application written in JS will continue to perform other actions instead of waiting for responses to outgoing requests. Therefore, a callback function was introduced to stop receiving a response until a real response from the API came.
Thirdly, this feature makes the code more readable. It provides crypto email database list flexibility, ease of use and modification of the code in the sequence of actions.
For example, writing code for servers in the Node.js environment is entirely based on asynchronous programming and the use of callback functions.
Examples of callback functions
First, let's look at how functions work without using callbacks.