Node.js zlib.bytesWritten Property

The zlib.bytesWritten property is an application programming interface of the zlib module which is used to specify the number of bytes written to the engine before the bytes are processed (compressed or decompressed, as proper for the derived class).

Syntax:

zlib.bytesWritten

Return Value: It returns the number of bytes written to the engine. 

The below examples illustrate the use of zlib.bytesWritten method in Node.js:

Example 1: 

Output:

21

Example 2: 

Output:

16

Reference: https://nodejs.org/api/zlib.html#zlib_zlib_byteswritten