ant-design/components/_util/easings.ts

const Easings = {
  easeInOutCubic: (t: number, b: number, c: number, d: number) => {
    const cc = c - b;
    t /= d / 2;
    if (t < 1) {
      return (cc / 2) * t * t * t + b;
    }
    return (cc / 2) * ((t -= 2) * t * t + 2) + b;
  },
};

export default Easings;