Вопросы на собеседовании для Frontend React Middle ( Senior )

1function add(a, b) {
2  return a + b;
3}

1async function fetchData() {
2  const response = await fetch('https://api.example.com/data');
3  const data = await

1let promise = new Promise((resolve, reject) => {
2  setTimeout(() => resolve("Done!"), 1000

1function example() {
2  let local = "local";
3  console.log(local);
4

1function outer() {
2  let count = 0;
3  return function inner() {
4

1const add = (a, b) => a + b;

1function myFunction() {
2  // тело функции
3}

1const myFunction = () => {
2  // тело функции
3}

1function RegularFunction() {
2  this.value = 1;
3  setTimeout(function() {
4

1setTimeout(function() {
2  console.log("Hello, world!");
3}, 1000);

1function add(a) {
2  return function(b) {
3    return a + b;
4

1let a;
2console.log(a); // undefined
3let b = null;
4console.

1const person = {
2  name: "John",
3  age: 30
4};

1// Функция высшего порядка, принимающая функцию в качестве аргумента
2function higherOrderFunction(callback) {
3  const result = callback(5);
4

1import React, { useMemo } from 'react';
2
3function ExpensiveComponent({ a, b }) {
4

1import React, { useState } from 'react';
2
3function Counter() {
4  const [

1import React, { useCallback, useState } from 'react';
2
3function CallbackComponent() {
4

1import React, { useContext, createContext } from 'react';
2
3const MyContext = createContext();
4

1import React, { useEffect, useState } from 'react';
2
3function DataFetchingComponent() {
4

1import React, { useRef, useState } from 'react';
2
3function RefComponent() {
4  const

1import React, { useReducer } from 'react';
2
3const initialState = { count: 0 };
4

1import { configureStore, createSlice } from '@reduxjs/toolkit';
2
3const counterSlice = createSlice({
4  name:

1import React from 'react';
2
3function Greeting({ isLoggedIn }) {
4  return (
5

1import React from 'react';
2
3const MyComponent = React.memo(function MyComponent({ value }) {
4

1import React, { useRef } from 'react';
2
3function TextInputWithFocusButton() {
4  const inputRef

1import { useState, useEffect } from 'react';
2
3function useWindowWidth() {
4  const [

Вопросы на собеседовании для Frontend React Middle ( Senior )