hooks

import { useReducer } from 'react'

interface FormState {
  values: Record<string, any>
  errors: Record<string, string>
  touched: Record<string, boolean>

export interface UploadHandle {
  promise: Promise<{ status: number; body: string }>;
  xhr: XMLHttpRequest;
}

export function uploadFile(

export interface Post {
  id: string;
  title: string;
  updatedAt: string;
}

export type Validator = (value: string) => string | null;

export const required = (message = 'This field is required'): Validator => {
  return (value) => (value.trim().length === 0 ? message : null);
};

import { useEffect, useState } from "react";

export function useDebouncedValue<T>(value: T, delay = 800): T {
  const [debounced, setDebounced] = useState<T>(value);

  useEffect(() => {

export type EventMap = Record<string, unknown[]>;

type Listener<Args extends unknown[]> = (...args: Args) => void;

export class TypedEmitter<Events extends EventMap> {
  private listeners = new Map<keyof Events, Set<Listener<any>>>();

import { useCallback, useEffect, useRef } from 'react';

export function useRafThrottle(callback) {
  const savedCallback = useRef(callback);
  const frame = useRef(null);
  const latestArgs = useRef([]);

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

export type CopyStatus = 'idle' | 'copied' | 'error';

function fallbackCopy(text: string): boolean {
  const textarea = document.createElement('textarea');

import { Response } from 'express';

type Client = { id: number; res: Response };

const clients = new Map<string, Set<Client>>();
let nextId = 1;

import React, { useMemo } from 'react';
import { VirtualList } from './VirtualList';

interface LogEntry {
  id: number;
  level: 'info' | 'warn' | 'error';

import { useCallback, useEffect, useRef } from "react";

export function useRafThrottle(callback) {
  const callbackRef = useRef(callback);
  const frameRef = useRef(null);
  const latestArgs = useRef([]);

import { useCallback, useEffect, useState } from 'react';

function parseSearch(search) {
  const params = new URLSearchParams(search);
  const out = {};
  for (const [key, value] of params.entries()) out[key] = value;