9 lines
354 B
JavaScript
9 lines
354 B
JavaScript
import * as React from 'react';
|
|
export default function useMemo(getValue, condition, shouldUpdate) {
|
|
var cacheRef = React.useRef({});
|
|
if (!('value' in cacheRef.current) || shouldUpdate(cacheRef.current.condition, condition)) {
|
|
cacheRef.current.value = getValue();
|
|
cacheRef.current.condition = condition;
|
|
}
|
|
return cacheRef.current.value;
|
|
} |