#hooks code explainers

typescript

import { useCallback, useId, useRef, useState, type KeyboardEvent } from 'react';
 
interface Tab {
  id: string;

Building an accessible tabs component in React

accessibility aria keyboard-navigation

Intermediate 8 steps

javascript

import { createContext, useContext, useState, useCallback, useRef } from "react";
 
const ToastContext = createContext(null);

Building a toast notification system in React

context state-management hooks

Intermediate 7 steps

javascript

import { useState, useEffect, useRef, useCallback } from 'react';
 
export default function Carousel({ images }) {
  const [index, setIndex] = useState(0);

Building a wrap-around Carousel in React

hooks usecallback event-listeners

Intermediate 9 steps

javascript

import { useEffect, useRef } from "react";
import { useLocation } from "react-router-dom";
 
export function RouteFocus({ title, children }) {

Managing focus on route change in React

accessibility focus-management routing

Intermediate 6 steps

javascript

import { useState, useRef, useCallback } from "react";
 
export function MultiSelect({ options, value, onChange, placeholder = "Select…" }) {
  const [open, setOpen] = useState(false);

Building a keyboard-accessible MultiSelect in React

controlled-component accessibility keyboard-navigation

Intermediate 10 steps

javascript

import { useState, useCallback, useRef } from 'react';
 
function LikeButton({ postId, initialLiked, initialCount }) {
  const [liked, setLiked] = useState(initialLiked);

Optimistic like button with React

optimistic-ui abortcontroller error-handling

Advanced 7 steps

javascript

import { useState, useRef, useEffect, useCallback } from 'react';
 
export function CopyButton({ text, label = 'Copy' }) {
  const [copied, setCopied] = useState(false);

A copy-to-clipboard button in React

clipboard-api hooks cleanup

Intermediate 7 steps

javascript

import { createContext, useContext, useEffect, useState, useCallback } from 'react';
 
const ThemeContext = createContext(null);

Building a theme provider with React Context

context hooks dark-mode

Intermediate 9 steps