@razorpay/blade/build/lib/web/production/utils/useDidUpdate.js

The Design System that powers Razorpay

import { useRef, useEffect } from 'react';

/**
 * Hook to run an effect on dependencies change after the component has *mounted*.
 * Core difference from `useEffect` is this will trigger effects after the very first render.
 *
 * @param effectCallback `useEffect` callback
 * @param dependencies `useEffect` dependencies
 */
var useDidUpdate = function useDidUpdate(effectCallback, dependencies) {
  var isMounted = useRef(false);
  useEffect(function () {
    if (isMounted.current) {
      // run normally after the very first render / mount
      return effectCallback();
    }
    isMounted.current = true;
    return undefined;

    // we don't want to rerun every time effectCallback changes
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, dependencies);
};

export { useDidUpdate };
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