spawn-streaming

Runs a child process while streaming output, optionally adding a colored prefix to each line.

npm install spawn-streaming

import spawn from 'spawn-streaming'

await spawn('npm', ['test'], { stdio: 'inherit' }, { prefix: 'bob' });

Use { stdio: 'inherit' } to display output as it arrives. Omit it and set encoding: 'utf8' to collect string output in the resolved result. stdio: 'inherit' and encoding cannot be used together. The optional streaming setting is prefix.