react-native-reanimated/lib/module/reactUtils.js

More powerful alternative to Animated library for React Native.

'use strict';

import React from 'react';
export function assignRef(ref, instance) {
  if (typeof ref === 'function') {
    const cleanup = ref(instance);
    return typeof cleanup === 'function' ? cleanup : undefined;
  }
  if (ref) {
    ref.current = instance;
  }
  return undefined;
}
export function mergeRefs(...refs) {
  return instance => {
    const cleanups = refs.map(ref => assignRef(ref, instance) ?? (() => assignRef(ref, null)));
    return () => cleanups.forEach(cleanup => cleanup());
  };
}
function getCurrentReactOwner() {
  return (
    // @ts-expect-error React secret internals aren't typed
    React.__CLIENT_INTERNALS_DO_NOT_USE_OR_WARN_USERS_THEY_CANNOT_UPGRADE?.A?.getOwner?.() ||
    // @ts-expect-error React secret internals aren't typed
    React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED?.ReactCurrentOwner?.current ||
    // @ts-expect-error React secret internals aren't typed
    React.__SERVER_INTERNALS_DO_NOT_USE_OR_WARN_USERS_THEY_CANNOT_UPGRADE?.ReactCurrentOwner?.current
  );
}
export function isReactRendering() {
  return !!getCurrentReactOwner();
}
export function isFirstReactRender() {
  const currentOwner = getCurrentReactOwner();
  // alternate is not null only after the first render and stores all the
  // data from the previous component render
  return currentOwner && !currentOwner?.alternate;
}
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