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export const throttle = <FN extends (...args: Parameters<FN>) => ReturnType<FN>>(
  fn: FN,
  delay: number
) => {
  let wait = false
  let timeout: undefined | number
  let prevValue: ReturnType<FN> | undefined = undefined

  const throttleFn = (...args: Parameters<FN>) => {
    if (wait) {

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

export function useResizeObserver<E extends Element>() {
  const ref = useRef<E>(null)
  const [width, setWidth] = useState(0)
  const [height, setHeight] = useState(0)

  useEffect(() => {
    if (!ref.current) {
      return () => {}

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

export type StateSetter<S> = (intermediateState: S) => S

// For optimal performance mutate state in setIntermediateState
// and pass a custom `makeNewState` for when the final state is
// updated. e.g. `obj => {...obj}` or `arr => [...arr]`
export function useThrottledState<S>(
  initialState: S | (() => S),
  timeout = 300,

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fastify.get<{ Querystring: { address: string } }>(
  '/checkAddress',
  {
    schema: {
      querystring: {
        type: 'object',
        properties: {
          postcode: { type: 'string' },
        },
        required: ['postcode'],

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import Fastify from 'fastify'
import middie from 'middie'
import cors from 'cors'
import frameguard from 'frameguard'
import xXssProtection from 'x-xss-protection'

const fastify = Fastify({
  logger: true,
})

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function binarySearch<T = any>(
  findValue: number,
  items: T[],
  getValue: (item: T) => number
) {
  let lo = 0
  let hi = items.length - 1

  while (lo <= hi) {
    const mi = (lo + hi) >>> 1

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{
  "main": "dist/index.cjs.js",
  "module": "dist/index.js",
  "exports": {
    ".": {
      "import": "./dist/index.js",
      "require": "./dist/index.cjs.js"
    }
  },
  "types": "dist/index.d.ts", 

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import { useEffect, useRef } from 'react'

export function useSizeObserver(
  elRef: React.RefObject<HTMLElement | null>,
  onChange: (width: number, height: number) => void,
  shouldObserve = true
) {
  const onChangeRef = useRef(onChange)
  onChangeRef.current = onChange

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import { round, floor, ceil, roundToTick, floorToTick, ceilToTick } from './math'

describe('math', () => {
  it('round works up to 8 decimals and 999 million', () => {
    expect(round(123.123456789, 0)).toEqual(123)
    expect(round(123.123456789, 1)).toEqual(123.1)
    expect(round(123.123456789, 2)).toEqual(123.12)
    expect(round(123.123456789, 3)).toEqual(123.123)
    expect(round(123.123456789, 4)).toEqual(123.1235)
    expect(round(123.123456789, 5)).toEqual(123.12346)

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type UpdateCb = (x: number, y: number) => void;

export interface DecayAnimationProps {
  deceleration?: number;
  onUpdate: UpdateCb;
}

export class DecayAnimation {
  deceleration: number;
  _onUpdate: UpdateCb;