react

import React, { createContext, useContext, useEffect, useState, ReactNode } from 'react'

type Theme = 'light' | 'dark'

interface ThemeContextType {
  theme: Theme

import { useState } from 'react'
import {
  DndContext,
  closestCenter,
  KeyboardSensor,
  PointerSensor,

import { z } from 'zod';

export const signupSchema = z
  .object({
    email: z.string().min(1, 'Email is required').email('Enter a valid email'),
    password: z

export const FLAG_REGISTRY = {
  newDashboard: {
    default: false as boolean,
    description: 'Renders the redesigned dashboard shell',
  },
  maxUploadMb: {

import { z } from "zod";

export const signupSchema = z
  .object({
    email: z.string().min(1, "Email is required").email("Enter a valid email"),
    username: z

import { Suspense } from 'react'
import { useSuspenseQuery } from '@tanstack/react-query'
import { useParams } from 'react-router-dom'
import api from '@/services/api'
import { Post } from '@/types'
import { ErrorBoundary } from '@/components/ErrorBoundary'

import React, { lazy, Suspense, useState, useEffect } from 'react';

// 1. Component lazy loading
const HeavyComponent = lazy(() => import('./HeavyComponent'));
const AdminPanel = lazy(() => import('./AdminPanel'));
const Dashboard = lazy(() => import('./Dashboard'));

import React, { useState, useEffect, useCallback, useMemo, useRef, useContext } from 'react';

// 1. useState - managing component state
function Counter() {
  const [count, setCount] = useState(0);
  const [name, setName] = useState('');

export const initialState = (steps, initialData = {}) => ({
  steps,
  stepIndex: 0,
  data: initialData,
  errors: {},
});

import { ReactNode, useEffect, useState } from 'react'
import { createPortal } from 'react-dom'

interface PortalProps {
  children: ReactNode
  container?: Element

import { Link, useLocation, useMatches } from 'react-router-dom'

interface BreadcrumbMatch {
  pathname: string
  handle?: {
    crumb?: (data?: any) => string

export interface Todo {
  id: string;
  title: string;
  done: boolean;
}