Javascript callback functions are by default Synchronous or Asynchronous ?

Many times we pass callback functions to perform different tasks. In node.js these callback functions halp us to work Asynchronously but do they have the same impact in vanilla is code or anywhere else we use Javascript ?

Comments

[robvirtuoso]

In the browser, callbacks are mostly synchronous with the exception of:

• event handlers
• request-response handlers
• timer callbacks (setTimeout, clearTimeout)

But even in Node.js you have many synchronous callbacks, which you may not know as "callbacks". In particular, callbacks for iterating arrays, i.e. forEach, map, reduce.

[Muhammad Hamza Hijazi]

Thanks buddy