ant-design-vue/components/_util/hooks/useMemo.ts

import type { Ref, WatchSource } from 'vue';
import { ref, watch } from 'vue';

export default function useMemo<T>(
  getValue: () => T,
  condition: (WatchSource<unknown> | object)[],
  shouldUpdate?: (prev: any[], next: any[]) => boolean,
) {
  const cacheRef: Ref<T> = ref(getValue() as any);
  watch(condition, (next, pre) => {
    if (shouldUpdate) {
      if (shouldUpdate(next, pre)) {
        cacheRef.value = getValue();
      }
    } else {
      cacheRef.value = getValue();
    }
  });

  return cacheRef;
}