srph

import { intervalToDuration, isAfter, eachDayOfInterval, addMonths } from 'date-fns'    

const remaining = intervalToDuration({
  start: now,
  end: target
})

const days =
  remaining.months && remaining.days
    ? remaining.days +

srph

export const getServerSideProps = withPageAuthRequired({
  async getServerSideProps(ctx) {
    const whitelisted = ['your@email.com']

    const session = getSession(ctx.req, ctx.res)

    if (!whitelisted.includes(session.user.email)) {
      return {
        redirect: {
          destination: '/logout',

srph

import { useEffect, useRef } from 'react'

// useEffect that runs on mount and works with Suspense / Fast Refresh
const useMount = (fn: () => void) => {
  const isMountedRef = useRef(false)

  useEffect(() => {
    if (isMountedRef.current) return
    isMountedRef.current = true
    fn()

srph

import { delay } from './time'

export async function poll<T = any>(callback: () => Promise<T>, condition: (t: T) => boolean, ms: number): Promise<T> {
  let first = true

  while (true) {
    const data = first ? await callback() : await delay(ms).then(callback)

    if (condition(data) === true) {
      return data

srph

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

interface MemoizeProps<T, Y extends unknown> {
  value: () => T
  dependencies: Y[]
}

const Memoize = ({ value, dependencies }) => {
  const [state, setState] = useState(value)
  

srph

const { pathname } = useRouter()

const active: Record<string, boolean> = useMemo(() => {
    return [
      { key: 'home', url: '/' },
      { key: 'about', url: '/about' },
      { key: 'contact', url: '/contact' }
    ].reduce((object, link) => {
      object[link.key] = pathname === link.url
      return object

srph

Usage

import React from 'react'
import { useAuthUser } from '~/src/contexts/AuthUser'
import { useInterceptor } from './useInterceptor'

/**
 * Setup axios interceptors to work with auth
 */

srph

export function mergeRefs<T>(...refs: Ref<T>[]) {
  return (value: T) => {
    refs.forEach((ref) => {
      if (typeof ref === 'function') {
        ref(value)
      } else if (ref.current) {
        ref.current = value
      }
    })
  }

srph

import React, { useMemo } from 'react'
import ReactDOM from 'react-dom'
import styled from 'styled-components'
import { usePopper } from 'react-popper'
import type { Placement, Offsets } from '@popperjs/core'

import { useStateRef, useUpdateEffect, useDocumentListener, useOutsideClick } from '~/src/hooks'
import { theme } from '~/src/theme'

interface Props {

srph

const merge = (left: number[], right: number[]): number[] => {
  let result = []
  let lindex = 0
  let rindex = 0

  while (lindex < left.length && rindex < right.length) {
    if (left[lindex] < right[rindex]) {
      result.push(left[lindex])
      lindex++
    } else {