You can define a debug version: const pipe_debug = (...args) => args.reduce((prev, curr) => { console.log('pipe debug; curr:', curr, ', prev:', prev)

You can define a debug version: const pipe_debug = (...args) => args.reduce((prev, curr) => { console.log('pipe debug; curr:', curr, ', prev:', prev) return curr(prev) }) and when you want to see intermediate results of a `pipe` call, you append `_debug` to the name.