Node.js gzip compress and decompress example

gzip.js

const zlib = require('zlib')

const buf = Buffer.from('hello world', 'utf-8')

zlib.gzip(buf, (err, compressed) => {
  if (err) {
    console.error(err)
  }

  console.log(compressed) // <Buffer 1f 8b 08 00 00 00 00 00 00 13 cb 48 cd c9 c9 57 28 cf 2f ca 49 01 00 85 11 4a 0d 0b 00 00 00>

  zlib.unzip(compressed, (err, decompressed) => {
    if (err) {
      console.error(err)
    }

    console.log(decompressed.toString()) // "hello world"
  })
})