react-use/src/useSpring.ts
2019-04-12 23:18:11 +10:00

40 lines
991 B
TypeScript

import { useEffect, useState } from 'react';
import { Spring, SpringSystem } from 'rebound';
const useSpring = (targetValue: number = 0, tension: number = 50, friction: number = 3) => {
const [spring, setSpring] = useState<Spring | null>(null);
const [value, setValue] = useState<number>(targetValue);
useEffect(() => {
const listener = {
onSpringUpdate: currentSpring => {
const newValue = currentSpring.getCurrentValue();
setValue(newValue);
},
};
if (!spring) {
const newSpring = new SpringSystem().createSpring(tension, friction);
newSpring.setCurrentValue(targetValue);
setSpring(newSpring);
newSpring.addListener(listener);
return;
}
return () => {
spring.removeListener(listener);
setSpring(null);
};
}, [tension, friction]);
useEffect(() => {
if (spring) {
spring.setEndValue(targetValue);
}
}, [targetValue]);
return value;
};
export default useSpring;