Chaining functions

I am currently trying to use the got module https://www.npmjs.com/package/got but I am a bit confused on the format/order of functions. It's evident that you can chain the listeners and functions as such

 got.stream(link)
 .on('response', resp => {
   if (resp.statusCode != 200) this.emit('error', '!200')
 })
 .on('error', err => {
   console.log(err)
 })
 .pipe(somewhere)

The request module also does this. But how do you avoid .pipe if you want it to happen only on the condition resp.statusCode != 200? Seeing that it's used in a lot of request modules, it must be a very basic thing to understand but I can't quite grasp it.

via platizin