react-native-reanimated-tests.tsx

/* eslint-disable @typescript-eslint/no-empty-function */
/* eslint-disable @typescript-eslint/ban-ts-comment */
/* eslint-disable @typescript-eslint/no-unused-vars */
import React, { useState, useCallback, forwardRef } from 'react';
import {
  StyleSheet,
  Button,
  View,
  Image,
  FlatListProps,
  ViewProps,
  ImageProps,
} from 'react-native';
import {
  PanGestureHandler,
  PinchGestureHandlerGestureEvent,
  PinchGestureHandler,
  PanGestureHandlerGestureEvent,
  FlatList,
} from 'react-native-gesture-handler';
import Animated, {
  useSharedValue,
  useDerivedValue,
  useAnimatedStyle,
  useAnimatedScrollHandler,
  useAnimatedGestureHandler,
  Easing,
  withTiming,
  withSpring,
  cancelAnimation,
  withDelay,
  withRepeat,
  withSequence,
  withDecay,
  useWorkletCallback,
  createWorklet,
  runOnUI,
  useAnimatedReaction,
  interpolateColor,
  makeMutable,
  interpolateNode,
  useValue,
  color,
  interpolateColors,
  createAnimatedPropAdapter,
  useAnimatedProps,
  useAnimatedRef,
  // eslint-disable-next-line import/no-unresolved
} from 'react-native-reanimated';

class Path extends React.Component<{ fill?: string }> {
  render() {
    return null;
  }
}

type Item = {
  id: number;
};

const SomeFC = (props: ViewProps) => {
  return <View {...props} />;
};

const SomeFCWithRef = forwardRef((props: ViewProps) => {
  return <View {...props} />;
});

// Class Component -> Animated Class Component
const AnimatedPath = Animated.createAnimatedComponent(Path);
const AnimatedImage = Animated.createAnimatedComponent(Image);
const AnimatedFlatList = Animated.createAnimatedComponent(FlatList);
const AnimatedTypedFlatList = Animated.createAnimatedComponent<
  FlatListProps<Item[]>
>(FlatList);

// Function Component -> Animated Function Component
const AnimatedFC = Animated.createAnimatedComponent(SomeFC);
const AnimatedFCWithRef = Animated.createAnimatedComponent(SomeFCWithRef);

function CreateAnimatedComponentTest1() {
  const animatedProps = useAnimatedProps(() => ({ fill: 'blue' }));
  return <AnimatedPath animatedProps={animatedProps} />;
}

function CreateAnimatedComponentTest2() {
  const animatedProps = useAnimatedProps(() => ({ fill2: 'blue' }));
  return (
    // @ts-expect-error
    <AnimatedPath animatedProps={animatedProps} />
  );
}

function CreateAnimatedComponentTest3() {
  const animatedProps = useAnimatedProps(
    () => ({ pointerEvents: 'none' } as const)
  );
  return (
    <Animated.View animatedProps={animatedProps}>
      <AnimatedPath />
    </Animated.View>
  );
}

function CreateAnimatedFlatList() {
  const renderItem = useCallback(
    ({ item, index }: { item: Item[]; index: number }) => {
      if (Math.random()) {
        return null;
      }
      return <View style={{ width: 100 }}></View>;
    },
    []
  );
  return (
    <>
      <AnimatedTypedFlatList
        style={{ flex: 1 }}
        data={[]}
        renderItem={renderItem}
      />
      <AnimatedFlatList
        // @ts-expect-error
        style={{ flex: 1, red: false }}
        data={[]}
        renderItem={() => null}
      />
      <AnimatedImage style={{ flex: 1 }} source={{ uri: '' }} />
    </>
  );
}

function TestClassComponentRef() {
  const animatedRef = useAnimatedRef<React.Component<ImageProps>>();
  return <AnimatedImage ref={animatedRef} source={{}} />;
}

function TestFunctionComponentRef() {
  const animatedRef = useAnimatedRef<React.Component<ViewProps>>();
  return (
    <AnimatedFC
      // @ts-expect-error ref is not available on plain function-components
      ref={animatedRef}
    />
  );
}

function TestFunctionComponentForwardRef() {
  const animatedRef = useAnimatedRef<React.Component<ViewProps>>();
  return <AnimatedFCWithRef ref={animatedRef} />;
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
  box: {
    height: 50,
    backgroundColor: 'blue',
  },
});

/**
 * Reanimated 1
 */

// @TODO: add reanimated 1 tests here

/**
 * Reanimated 2 Functions
 */

// makeMutable
function MakeMutableTest() {
  const mut = makeMutable(0);
  const mut2 = makeMutable(true);

  return <Animated.View style={styles.container} />;
}

/**
 * Reanimated 2 Hooks
 */

// useSharedValue
function SharedValueTest() {
  const translate = useSharedValue(0);
  const translate2 = useSharedValue(0);
  const translate3 = useSharedValue(0);

  const sharedBool = useSharedValue<boolean>(false);
  if (sharedBool.value) {
    sharedBool.value = false;
  }

  return <Animated.View style={styles.container} />;
}

// useAnimatedStyle
function AnimatedStyleTest() {
  const width = useSharedValue(50);
  const animatedStyle = useAnimatedStyle(() => {
    return {
      width: width.value,
    };
  });
  return <Animated.View style={[styles.box, animatedStyle]} />;
}

// useAnimatedStyle with arrays (invalid return)
function AnimatedStyleArrayTest() {
  const width = useSharedValue(50);
  // @ts-expect-error since the animated style cannot be an array.
  const animatedStyle = useAnimatedStyle(() => {
    return [styles.box, { width: width.value }];
  });
  return <Animated.View style={[styles.box, animatedStyle]} />;
}

// useAnimatedStyle with null (invalid return)
function AnimatedStyleNullTest() {
  const width = useSharedValue(50);
  // @ts-expect-error since the animated style cannot be "false".
  const animatedStyle = useAnimatedStyle(() => false);
  return <Animated.View style={[styles.box, animatedStyle]} />;
}

// useAnimatedStyle with number (invalid return)
function AnimatedStyleNumberTest() {
  const width = useSharedValue(50);
  // @ts-expect-error since the animated style cannot be a number.
  const animatedStyle = useAnimatedStyle(() => 5);
  return <Animated.View style={[styles.box, animatedStyle]} />;
}

// useDerivedValue
function DerivedValueTest() {
  const progress = useSharedValue(0);
  const width = useDerivedValue(() => {
    return progress.value * 250;
  });
  // @ts-expect-error width is readonly
  width.value = 100;
  return (
    <Button title="Random" onPress={() => (progress.value = Math.random())} />
  );
}

// useAnimatedScrollHandler
function AnimatedScrollHandlerTest() {
  const translationY = useSharedValue(0);
  const scrollHandler = useAnimatedScrollHandler((event) => {
    translationY.value = event.contentOffset.y;
  });
  const stylez = useAnimatedStyle(() => {
    return {
      color: 'red',
      backgroundColor: 0x00ff00,
      transform: [
        {
          translateY: translationY.value,
        },
        {
          rotate: `${Math.PI}rad`,
        },
      ],
    };
  });
  // @ts-expect-error
  const style2 = useAnimatedStyle(() => {
    return {
      transform: [
        {
          rotate: Math.PI,
        },
      ],
    };
  });
  // @ts-expect-error
  const style3 = useAnimatedStyle(() => {
    return {
      color: {},
    };
  });
  return (
    <View style={styles.container}>
      <Animated.View style={[styles.box, stylez]} />
      <Animated.ScrollView onScroll={scrollHandler} scrollEventThrottle={16} />
    </View>
  );
}

// useAnimatedGestureHandler with context
function AnimatedGestureHandlerTest() {
  const x = useSharedValue(0);
  const gestureHandler = useAnimatedGestureHandler<
    PanGestureHandlerGestureEvent,
    { startX: number }
  >({
    onStart: (_, ctx) => {
      ctx.startX = x.value;
    },
    onActive: (event, ctx) => {
      x.value = ctx.startX + event.translationX;
    },
    onEnd: (_) => {
      x.value = 0;
    },
  });
  const animatedStyle = useAnimatedStyle(() => {
    return {
      transform: [
        {
          translateX: x.value,
        },
      ],
    };
  });
  return (
    <PanGestureHandler onGestureEvent={gestureHandler}>
      <Animated.View style={[styles.box, animatedStyle]} />
    </PanGestureHandler>
  );
}

function AnimatedPinchGestureHandlerTest() {
  const x = useSharedValue(0);
  const gestureHandler = useAnimatedGestureHandler<PinchGestureHandlerGestureEvent>(
    {
      onActive: (event) => {
        x.value = event.scale;
      },
      onEnd: () => {
        x.value = withTiming(1);
      },
    }
  );
  const animatedStyle = useAnimatedStyle(() => {
    return {
      transform: [
        {
          scale: x.value,
        },
      ],
    };
  });
  return (
    <PinchGestureHandler onGestureEvent={gestureHandler}>
      <Animated.View style={[styles.box, animatedStyle]} />
    </PinchGestureHandler>
  );
}

/**
 * Reanimated 2 Animations
 */

// withTiming
function WithTimingTest() {
  const width = useSharedValue(50);
  const style = useAnimatedStyle(() => {
    return {
      width: withTiming(
        width.value,
        {
          duration: 500,
          easing: Easing.bezier(0.25, 0.1, 0.25, 1),
        },
        (finished) => {}
      ),
    };
  });
  return (
    <View>
      <Animated.View style={[styles.box, style]} />
      <Button onPress={() => (width.value = Math.random() * 300)} title="Hey" />
    </View>
  );
}

function WithTimingToValueAsColorTest() {
  const style = useAnimatedStyle(() => {
    return {
      width: withTiming(
        'rgba(255,105,180,0)',
        {
          duration: 500,
          easing: Easing.bezier(0.25, 0.1, 0.25, 1),
        },
        (_finished) => {}
      ),
    };
  });
  return (
    <View>
      <Animated.View style={[styles.box, style]} />
    </View>
  );
}

// withSpring
function WithSpringTest() {
  const x = useSharedValue(0);
  const gestureHandler = useAnimatedGestureHandler({
    onStart: (_, ctx: { startX: number }) => {
      ctx.startX = x.value;
    },
    onActive: (event, ctx: { startX: number }) => {
      x.value = ctx.startX + event.translationX;
    },
    onEnd: (_) => {
      x.value = withSpring(0, {}, (finished) => {});
    },
  });
  const animatedStyle = useAnimatedStyle(() => {
    return {
      transform: [
        {
          translateX: x.value,
        },
      ],
    };
  });
  return (
    <PanGestureHandler onGestureEvent={gestureHandler}>
      <Animated.View style={[styles.box, animatedStyle]} />
    </PanGestureHandler>
  );
}

function WithSpringToValueAsColorTest() {
  const style = useAnimatedStyle(() => {
    return {
      width: withSpring('rgba(255,105,180,0)', {}, (_finished) => {}),
    };
  });
  return (
    <View>
      <Animated.View style={[styles.box, style]} />
    </View>
  );
}

// cancelAnimation
function CancelAnimationTest() {
  const x = useSharedValue(0);
  const gestureHandler = useAnimatedGestureHandler({
    onStart: (_, ctx: { startX: number }) => {
      cancelAnimation(x);
    },
    onActive: (event, ctx: { startX: number }) => {
      x.value = ctx.startX + event.translationX;
    },
    onEnd: (_) => {
      x.value = 0;
    },
  });
  const animatedStyle = useAnimatedStyle(() => {
    return {
      transform: [
        {
          translateX: x.value,
        },
      ],
    };
  });
  return (
    <PanGestureHandler onGestureEvent={gestureHandler}>
      <Animated.View style={[styles.box, animatedStyle]} />
    </PanGestureHandler>
  );
}

// withDelay
function WithDelayTest() {
  const x = useSharedValue(0);
  const gestureHandler = useAnimatedGestureHandler<
    PanGestureHandlerGestureEvent,
    { startX: number }
  >({
    onStart: (_, _ctx) => {
      cancelAnimation(x);
    },
    onActive: (event, ctx) => {
      x.value = ctx.startX + event.translationX;
    },
    onEnd: (_) => {
      x.value = withDelay(1000, withTiming(70));
    },
  });
  const animatedStyle = useAnimatedStyle(() => {
    return {
      transform: [
        {
          translateX: x.value,
        },
      ],
    };
  });
  return (
    <PanGestureHandler onGestureEvent={gestureHandler}>
      <Animated.View style={[styles.box, animatedStyle]} />
    </PanGestureHandler>
  );
}

// withRepeat
function WithRepeatTest() {
  const x = useSharedValue(0);
  const gestureHandler = useAnimatedGestureHandler<
    PanGestureHandlerGestureEvent,
    { startX: number }
  >({
    onStart: (_, _ctx) => {
      cancelAnimation(x);
    },
    onActive: (event, ctx) => {
      x.value = ctx.startX + event.translationX;
    },
    onEnd: (_) => {
      x.value = withRepeat(withTiming(70), 1, true, (finished) => {});
    },
  });
  const animatedStyle = useAnimatedStyle(() => {
    return {
      transform: [
        {
          translateX: x.value,
        },
      ],
    };
  });
  return (
    <PanGestureHandler onGestureEvent={gestureHandler}>
      <Animated.View style={[styles.box, animatedStyle]} />
    </PanGestureHandler>
  );
}

// withSequence
function WithSequenceTest() {
  const x = useSharedValue(0);
  const gestureHandler = useAnimatedGestureHandler<
    PanGestureHandlerGestureEvent,
    { startX: number }
  >({
    onStart: (_, _ctx) => {
      cancelAnimation(x);
    },
    onActive: (event, ctx) => {
      x.value = ctx.startX + event.translationX;
    },
    onEnd: (_) => {
      x.value = withSequence(withTiming(70), withTiming(70));
    },
  });
  const animatedStyle = useAnimatedStyle(() => {
    return {
      transform: [
        {
          translateX: x.value,
        },
      ],
    };
  });
  return (
    <PanGestureHandler onGestureEvent={gestureHandler}>
      <Animated.View style={[styles.box, animatedStyle]} />
    </PanGestureHandler>
  );
}

// withDecay
function WithDecayTest() {
  const x = useSharedValue(0);

  const gestureHandler = useAnimatedGestureHandler({
    onStart: (_, ctx: { startX: number }) => {
      ctx.startX = x.value;
    },
    onActive: (event, ctx: { startX: number }) => {
      x.value = ctx.startX + event.translationX;
    },
    onEnd: (evt) => {
      x.value = withDecay({
        velocity: evt.velocityX,
        clamp: [0, 200], // optionally define boundaries for the animation
      });
    },
  });

  const animatedStyle = useAnimatedStyle(() => {
    return {
      transform: [
        {
          translateX: x.value,
        },
      ],
    };
  });

  return (
    <PanGestureHandler onGestureEvent={gestureHandler}>
      <Animated.View style={[styles.box, animatedStyle]} />
    </PanGestureHandler>
  );
}

// useWorkletCallback
function UseWorkletCallbackTest() {
  const workletCallback = useWorkletCallback((a: number, b: number) => {
    return a + b;
  }, []);

  runOnUI(() => {
    const res = workletCallback(1, 1);

    console.log(res);
  })();

  return <Animated.View style={styles.container} />;
}

// createWorklet
function CreateWorkletTest() {
  const workletCallback = createWorklet((a: number, b: number) => {
    return a + b;
  });

  runOnUI(() => {
    const res = workletCallback(1, 1);

    console.log(res);
  })();

  return <Animated.View style={styles.container} />;
}

// useWorkletCallback
function UseAnimatedReactionTest() {
  const [state, setState] = useState();
  const sv = useSharedValue(0);

  useAnimatedReaction(
    () => {
      return sv.value;
    },
    (value) => {
      console.log(value);
    }
  );

  useAnimatedReaction(
    () => {
      return sv.value;
    },
    (value) => {
      console.log(value);
    },
    []
  );

  useAnimatedReaction(
    () => {
      return sv.value;
    },
    (value) => {
      console.log(value);
    },
    [state]
  );

  useAnimatedReaction(
    () => {
      return sv.value;
    },
    (value, previousResult) => {
      console.log(value, previousResult);
    }
  );

  return null;
}

// interpolateColor
function interpolateColorTest() {
  const sv = useSharedValue(0);

  interpolateColor(sv.value, [0, 1], [0x00ff00, 0x0000ff]);
  interpolateColor(sv.value, [0, 1], ['red', 'blue']);
  interpolateColor(sv.value, [0, 1], ['#00FF00', '#0000FF'], 'RGB');
  interpolateColor(sv.value, [0, 1], ['#FF0000', '#00FF99'], 'HSV');

  return null;
}

function interpolateNodeTest() {
  const value = useValue(0);
  interpolateNode(value, {
    inputRange: [0, 1],
    outputRange: ['0deg', '100deg'],
  });
  interpolateNode(value, {
    inputRange: [0, 1],
    outputRange: ['0rad', `${Math.PI}rad`],
  });
}

function colorTest() {
  const r = useValue(255);
  const g = useValue(255);
  const b = useValue(255);
  const a = useValue(255);
  return color(r, g, b, a);
}

function interpolateColorsTest() {
  const animationValue = useValue(0);
  const color = interpolateColors(animationValue, {
    inputRange: [0, 1],
    outputColorRange: ['red', 'blue'],
  });
  return color;
}

// update props
function updatePropsTest() {
  const adapter1 = createAnimatedPropAdapter((props) => {}, []);
  const adapter2 = createAnimatedPropAdapter((props) => {}, ['prop1', 'prop2']);
  const adapter3 = createAnimatedPropAdapter(() => {});

  // @ts-expect-error works only for useAnimatedProps
  useAnimatedStyle(() => ({}), undefined, [adapter1, adapter2, adapter3]);

  useAnimatedProps(() => ({}), null, adapter1);

  useAnimatedProps(() => ({}), null, [adapter2, adapter3]);
}

// test partial animated props
function testPartialAnimatedProps() {
  const ap = useAnimatedProps<ImageProps>(() => ({
    height: 100,
  }));
  const aps = useAnimatedProps<ImageProps>(() => ({
    source: { uri: 'whatever' },
  }));

  // @ts-expect-error it should fail because `source` is a required prop
  const test1 = <AnimatedImage />;
  // TODO: Figure out a way to let this error pass, if `source` is set in `animatedProps` that should be okay even if it is not set in normal props!!
  // @ts-expect-error it should fail because `source` is a required prop, even though animatedProps sets it
  const test2 = <AnimatedImage animatedProps={aps} />;
  // should pass because source is set
  const test3 = <AnimatedImage source={{ uri: 'whatever' }} />;
  // should pass because source is set and `animatedProps` doesn't change that
  const test4 = (
    <AnimatedImage source={{ uri: 'whatever' }} animatedProps={ap} />
  );
  // TODO: Should this test fail? Setting it twice might not be intentional...
  // should pass because source is set normally and in `animatedProps`
  const test5 = (
    <AnimatedImage source={{ uri: 'whatever' }} animatedProps={aps} />
  );
}