Fake progress number, use the number with spring animation

progress.ts

const nextProgress = (progress: number) => {
  switch (true) {
    case progress < 40: {
      return progress + 40 + Math.random() * 10;
    }
    case progress < 60: {
      return progress + 8 + Math.random() * 2;
    }
    case progress < 80: {
      return progress + 3 + Math.random() * 2;
    }
    case progress < 90: {
      return progress + Math.random() * 3;
    }
    case progress < 99: {
      return progress + Math.random() * 1;
    }
  }
  return progress + Math.log10(progress / 100) * -100;
};