btoo

import { useRef, useEffect } from 'react';

/**
 * a type-safe version of the `usePrevious` hook described here:
 * @see {@link https://reactjs.org/docs/hooks-faq.html#how-to-get-the-previous-props-or-state}
 */
export function usePrevious<T>(
  value: T,
): ReturnType<typeof useRef<T>>['current'] {
  const ref = useRef<T>();

JannisRex

import React from 'react'
import { Text, View } from 'react-native'
import renderer from 'react-test-renderer'
import { ErrorBoundary } from '../../src/components/index'

describe('ErrorBoundary', () => {
  let consoleErrorSpy
  let errorMock
  let workingComponent

sindresorhus

Pure ESM package

The package that linked you here is now pure ESM. It cannot be require()'d from CommonJS.

This means you have the following choices:

1. Use ESM yourself. (preferred)
   Use import foo from 'foo' instead of const foo = require('foo') to import the package. You also need to put "type": "module" in your package.json and more. Follow the below guide.
2. If the package is used in an async context, you could use await import(…) from CommonJS instead of require(…).
3. Stay on the existing version of the package until you can move to ESM.

sibelius

jest.mock('uuid', () => {
  const base = '9134e286-6f71-427a-bf00-';
  let current = 100000000000;

  return {
    v4: () => {
      const uuid = base + current.toString();
      current++;

      return uuid;