How do you know if a function is asynchronous or synchronous in node.js?

Question

Is there any way to know if a function is asynchronous or synchronous in node.js ? Thanks in advance.

Answer 1

There's no programmatic way to tell.

The reliable way is to read the documentation.

You can also try to infer it from the function accepting a callback (but that isn't reliable, see Array.prototype.forEach for an example of a synchronous function that accepts a callback).