chore: add example

example/components/Header/Language/Arrow.tsx

@@ -0,0 +1,16 @@
+export const Arrow: React.FC = () => {
+  return (
+    <svg
+      width='12'
+      height='8'
+      viewBox='0 0 12 8'
+      fill='none'
+      xmlns='http://www.w3.org/2000/svg'
+    >
+      <path
+        className='fill-current text-black dark:text-white'
+        d='M9.8024 0.292969L5.61855 4.58597L1.43469 0.292969L0.0566406 1.70697L5.61855 7.41397L11.1805 1.70697L9.8024 0.292969Z'
+      />
+    </svg>
+  )
+}

example/components/Header/Language/LanguageFlag.tsx

@@ -0,0 +1,24 @@
+import Image from 'next/image'
+
+export interface LanguageFlagProps {
+  language: string
+}
+
+export const LanguageFlag: React.FC<LanguageFlagProps> = (props) => {
+  const { language } = props
+
+  return (
+    <>
+      <Image
+        quality={100}
+        width={35}
+        height={35}
+        src={`/images/languages/${language}.svg`}
+        alt={language}
+      />
+      <p data-cy='language-flag-text' className='mx-2 text-base'>
+        {language.toUpperCase()}
+      </p>
+    </>
+  )
+}

example/components/Header/Language/index.tsx

@@ -0,0 +1,76 @@
+import { useCallback, useEffect, useState, useRef } from 'react'
+import useTranslation from 'next-translate/useTranslation'
+import setLanguage from 'next-translate/setLanguage'
+import classNames from 'clsx'
+
+import i18n from '../../../i18n.json'
+import { Arrow } from './Arrow'
+import { LanguageFlag } from './LanguageFlag'
+
+export const Language: React.FC = () => {
+  const { lang: currentLanguage } = useTranslation()
+  const [hiddenMenu, setHiddenMenu] = useState(true)
+  const languageClickRef = useRef<HTMLDivElement | null>(null)
+
+  const handleHiddenMenu = useCallback(() => {
+    setHiddenMenu((oldHiddenMenu) => !oldHiddenMenu)
+  }, [])
+
+  useEffect(() => {
+    const handleClickEvent = (event: MouseEvent): void => {
+      if (languageClickRef.current == null || event.target == null) {
+        return
+      }
+      if (!languageClickRef.current.contains(event.target as Node)) {
+        setHiddenMenu(true)
+      }
+    }
+
+    window.document.addEventListener('click', handleClickEvent)
+
+    return () => {
+      return window.removeEventListener('click', handleClickEvent)
+    }
+  }, [])
+
+  const handleLanguage = async (language: string): Promise<void> => {
+    await setLanguage(language)
+  }
+
+  return (
+    <div className='flex cursor-pointer flex-col items-center justify-center'>
+      <div
+        ref={languageClickRef}
+        data-cy='language-click'
+        className='mr-5 flex items-center'
+        onClick={handleHiddenMenu}
+      >
+        <LanguageFlag language={currentLanguage} />
+        <Arrow />
+      </div>
+
+      <ul
+        data-cy='languages-list'
+        className={classNames(
+          'absolute top-14 z-10 mt-3 mr-4 flex w-24 list-none flex-col items-center justify-center rounded-lg bg-white p-0 shadow-lightFlag dark:bg-black dark:shadow-darkFlag',
+          { hidden: hiddenMenu }
+        )}
+      >
+        {i18n.locales.map((language, index) => {
+          if (language === currentLanguage) {
+            return null
+          }
+          return (
+            <li
+              key={index}
+              className='flex h-12 w-full items-center justify-center pl-2 hover:bg-[#4f545c] hover:bg-opacity-20'
+              onClick={async () => await handleLanguage(language)}
+            >
+              <LanguageFlag language={language} />
+            </li>
+          )
+        })}
+      </ul>
+    </div>
+  )
+}