react

javascript
import { useMemo, useCallback } from 'react';
import { useSearchParams } from 'react-router-dom';

function parseFilters(params) {
  return {
    q: params.get('q') || '',

Sync Filter State to the URL with a useSearchParams-Driven Filter Bar in React Router

react react-router hooks
by codesnips 3 tabs
typescript
export interface Todo {
  id: string;
  title: string;
  done: boolean;
}

Optimistic Todo Toggling in React with Rollback via useReducer

javascript typescript react
by codesnips 3 tabs
typescript
import React, { createContext, useContext, useState, ReactNode } from 'react'

interface TabsContextType {
  activeTab: string
  setActiveTab: (tab: string) => void
}

Compound components pattern for flexible APIs

react patterns components
by Maya Patel 2 tabs
typescript
import { createContext } from "react";

export type ToastVariant = "info" | "success" | "error";

export interface Toast {
  id: string;

Toast Notification Queue with a useToast Hook and Context Provider in React

react hooks context
by codesnips 4 tabs
javascript
import { useState, useRef, useEffect, useCallback } from "react";

export function useCarousel(length, { delay = 4000 } = {}) {
  const [index, setIndex] = useState(0);
  const [paused, setPaused] = useState(false);
  const savedCallback = useRef(null);

Autoplay Image Carousel in React with Pause-on-Hover via useRef and useEffect

react hooks carousel
by codesnips 3 tabs
javascript
const { EventEmitter } = require('events');

class NotificationBus extends EventEmitter {
  constructor(bufferSize = 100) {
    super();
    this.setMaxListeners(0);

Server-Sent Events for Live Notifications with a Reconnectable EventSource Hook

sse server-sent-events eventsource
by codesnips 3 tabs
typescript
import { useCallback, useEffect, useRef, useState } from "react";

export function useIntersectionObserver(options?: IntersectionObserverInit) {
  const [isIntersecting, setIsIntersecting] = useState(false);
  const nodeRef = useRef<Element | null>(null);
  const optionsKey = JSON.stringify(options ?? {});

Infinite-Scroll Feed with a React IntersectionObserver Hook and Cursor Pagination

react hooks intersection-observer
by codesnips 3 tabs
typescript
export class TimeoutError extends Error {
  constructor(public readonly ms: number) {
    super(`Request timed out after ${ms}ms`);
    this.name = "TimeoutError";
  }
}

HTTP client timeout with AbortController (fetch)

fetch abortcontroller timeout
by codesnips 3 tabs
typescript
import { Link } from 'react-router-dom'
import { useQueryClient } from '@tanstack/react-query'
import api from '@/services/api'
import { PostId } from '@/types'

interface PostLinkProps {

Prefetching data on hover for instant navigation

react performance prefetching
by Maya Patel 1 tab
typescript
import React from 'react'

interface SkeletonProps {
  width?: string | number
  height?: string | number
  className?: string

Skeleton screens for better perceived performance

react ux performance
by Maya Patel 3 tabs
typescript
export interface Post {
  id: string;
  body: string;
  liked: boolean;
  likeCount: number;
}

React Query optimistic update for likes

react typescript frontend
by codesnips 3 tabs
javascript
import React from 'react';

export function UndoSnackbar({ pending, onUndo }) {
  if (!pending) return null;

  return (

Undoable Delete with a Snackbar and useReducer Timeout Controller in React

react hooks usereducer
by codesnips 3 tabs