react-native-wagmi-charts
Version:
A sweet candlestick chart for React Native
13 lines • 519 B
JavaScript
import * as React from 'react';
export function usePrevious(value) {
// The ref object is a generic container whose current property is mutable ...
// ... and can hold any value, similar to an instance property on a class
const ref = React.useRef();
// Store current value in ref
React.useEffect(() => {
ref.current = value;
}, [value]); // Only re-run if value changes
// Return previous value (happens before update in useEffect above)
return ref.current;
}
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