Put a little spinner on process.stderr, as unobtrusively as possible.

import { spinner } from 'char-spinner'

// All options are optional
// even the options argument itself is optional
const clear = spinner(options)

// the return value is the clear function
// call it to stop the spinner
clear()

Usually the defaults are what you want. Mostly they're just configurable for testing purposes.

• stream Output stream. Default=process.stderr
• tty Only show spinner if output stream has a truish .isTTY. Default=true
• string String of chars to spin. Default='/-\\|'
• interval Number of ms between frames, bigger = slower. Default=50
• cleanup Print '\r \r' to stream on process exit. Default=true
• unref Unreference the spinner interval so that the process can exit normally. Default=true
• delay Number of frames to "skip over" before printing the spinner. Useful if you want to avoid showing the spinner for very fast actions. Default=2
• promise Pass in a promise or promise-returning function if you want it to automatically stop spinning when the promise resolves.

Returns a clear function if a spinner was created, otherwise undefined.