@tsfun/tap — Reference

Example:

const result = pass(value)
  .to(tap, value => console.log('begin', value))
  .to(inc)
  .to(tap, value => console.log('after inc', value))
  .to(double)
  .to(tap, value => console.log('after double', value))
  .to(square)
  .to(tap, value => console.log('after square', value))
  .get()

Example:

const myResult = pass(result)
  .to(tap, result => console.log('result before onOk/onErr', result))
  .to(map, tapper(value => console.log('value before onOk', value)))
  .to(mapErr, tapper(error => console.log('error before onErr', error)))
  .to(map, onOk)
  .to(map, tapper(value => console.log('value after onOk', value)))
  .to(mapErr, onErr)
  .to(mapErr, tapper(error => console.log('error after onErr', error)))
  .get()