Function buildAnimations

src/utils.ts:40–70

({
  animationIn,
  animationOut,
}: {
  animationIn: Animation | CustomAnimation;
  animationOut: Animation | CustomAnimation;
})

// User can define custom react-native-animatable animations, see PR #72
// Utility for creating our own custom react-native-animatable animations
export const buildAnimations = ({
  animationIn,
  animationOut,
}: {
  animationIn: Animation | CustomAnimation;
  animationOut: Animation | CustomAnimation;
}): Animations => {
  let updatedAnimationIn: string;
  let updatedAnimationOut: string;

  if (isObject(animationIn)) {
    const animationName = JSON.stringify(animationIn);
    makeAnimation(animationName, animationIn as CustomAnimation);
    updatedAnimationIn = animationName;
  } else {
    updatedAnimationIn = animationIn;
  }

  if (isObject(animationOut)) {
    const animationName = JSON.stringify(animationOut);
    makeAnimation(animationName, animationOut as CustomAnimation);
    updatedAnimationOut = animationName;
  } else {
    updatedAnimationOut = animationOut;
  }

  return {
    animationIn: updatedAnimationIn,
    animationOut: updatedAnimationOut,
  };
};

export const reversePercentage = (x: number) => -(x - 1);