export function formatMs ( milliseconds ) { if ( ! Number . isFinite ( milliseconds ) ) { return 'NaN' ; } const absInput = Math . abs ( Math . round ( milliseconds ) ) ; let millis = ( absInput % 1000 ) . toString ( ) ; if ( millis . length < 3 ) { if ( millis . length === 2 ) { millis = '0' + millis ; } else { millis = '00' + millis ; } } const seconds = Math . floor ( absInput / 1000 ) % 60 ; const minutes = Math . floor ( absInput / 60000 ) ; let output = `${ seconds }.${ millis }s` ; if ( minutes > 0 ) { output = `${ minutes }m${ output }` ; } if ( milliseconds < 0 ) { output = `-${ output }` ; } return output ; }