superset-frontend/src/hooks/useMemoCompare.ts
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import { useEffect, useRef } from 'react';
import { isDefined } from '@superset-ui/core';
export const useMemoCompare = <T>(
next: T,
compare: (prev: T | undefined, next: T) => boolean,
) => {
const previousRef = useRef<T>();
const previous = previousRef.current;
const isEqual = compare(previous, next);
useEffect(() => {
if (!isEqual) {
previousRef.current = next;
}
});
if (!isDefined(previous)) {
return next;
}
return isEqual ? previous : next;
};