weird-damp.js

if (changeInY > 0 && restraints.down !== null) {
        const dampFactor =
          1 -
          linearScale({
            domain: [0, restraints.down * 2],
            range: [0, 0.5],
            value: changeInY,
          });
        let dampedChangeInY = changeInY * dampFactor;

        if (dampedChangeInY > restraints.down) {
          dampedChangeInY = restraints.down;
        }

        changeInY = dampedChangeInY;
      } else if (changeInY < 0) {
        if (typeof restraints.up === 'number') {
          const dampFactor =
            1 -
            linearScale({
              domain: [0, -restraints.up * 2],
              range: [0, 0.5],
              value: changeInY,
            });
          let dampedChangeInY = changeInY * dampFactor;

          if (dampedChangeInY < -restraints.up) {
            dampedChangeInY = -restraints.up;
          }

          changeInY = dampedChangeInY;
        } else if (restraints.up === 'drag') {
          const absoluteChange = Math.abs(changeInY);
          changeInY = -Math.pow(absoluteChange, 0.7);
        }
      }