easings js

easing.js

    easing (percentComplete, elaspedTime) {
      const duration = lockingDuration
      const startValue = 0
      const endValue = 1
      // https://stackoverflow.com/questions/8316882/what-is-an-easing-function
      // x percentComplete,
      // t elaspedTime,
      // b startValue,
      // c endValue,
      // d duration

      // quadratic ease in
      // return endValue * (elaspedTime/=duration)*elaspedTime + startValue

      // ease out
      return -endValue * (elaspedTime /= duration) * (elaspedTime - 2) + startValue
    },