check if function is a generator

Question

I played with generators in Nodejs v0.11.2 and I\'m wondering how I can check that argument to my function is generator function.

I found this way typeof f ===

Answer 1

I checked how koa does it and they use this library: https://github.com/ljharb/is-generator-function.

You can use it like this

const isGeneratorFunction = require('is-generator-function');
if(isGeneratorFunction(f)) {
    ...
}