index.js
// the diff nanoseconds between start & stop.
the diff nanoseconds between start & stop.
the diff nanoseconds between start & stop .
diff () {
    if (this.stopped.length === 0) {
      throw new Error('Timer has not been stopped.')
    }
    return this.stopped[0] * 1e9 + this.stopped[1]
  }
diff ( ) { if ( this . stopped . length === 0 ) { throw new Error ( 'Timer has not been stopped.' ) } return this . stopped [ 0 ] * 1e9 + this . stopped [ 1 ] }
the diff nanoseconds between start & stop.
the diff nanoseconds between start & stop .