Node.js Writable Stream pipe Event

The pipe event in a Writable Stream is emitted when the stream.pipe() method is being called on a readable stream by attaching this writable to its set of destinations. 

Syntax:

Event: 'pipe'

Return Value: If the pipe() method is being called then this event is emitted else it is not emitted. 

The below examples illustrate the use of the 'pipe' event in Node.js: 

Example 1: 

Output:

Piped!
Program Ended.

Example 2: 

Output:

Program Ended

So, here pipe() function is not called so the pipe event is not emitted. 

Reference: https://nodejs.org/api/stream.html#stream_event_pipe