From dd298c9a74e081436d0c617601b7ef1f57afb2e2 Mon Sep 17 00:00:00 2001
From: Mark Teekman <markteekman@users.noreply.github.com>
Date: Tue, 26 Dec 2023 13:40:02 +0100
Subject: [PATCH] Add View Transitions as an example

---
 src/components/Header.astro     |   1 -
 src/components/Navigation.astro | 286 ++++++++++++++++----------------
 src/components/SiteMeta.astro   |   4 +
 src/layouts/DefaultLayout.astro |   2 +-
 4 files changed, 148 insertions(+), 145 deletions(-)

diff --git a/src/components/Header.astro b/src/components/Header.astro
index 233da03..8da7be6 100644
--- a/src/components/Header.astro
+++ b/src/components/Header.astro
@@ -51,7 +51,6 @@ import { Icon } from 'astro-icon'
 
         path {
           fill: var(--action-color);
-          transition: fill 0.2s ease-in-out;
         }
       }
 
diff --git a/src/components/Navigation.astro b/src/components/Navigation.astro
index 8aba2e5..ec44078 100644
--- a/src/components/Navigation.astro
+++ b/src/components/Navigation.astro
@@ -1,8 +1,8 @@
 ---
 import ResponsiveToggle from './ResponsiveToggle.astro'
 import { DarkMode } from 'accessible-astro-components'
-import { Image } from "astro:assets"
-import logo from "../assets/img/logo.svg"
+import { Image } from 'astro:assets'
+import logo from '../assets/img/logo.svg'
 ---
 
 <div id="main-navigation" class="is-desktop py-8">
@@ -29,180 +29,182 @@ import logo from "../assets/img/logo.svg"
 </div>
 
 <script>
-  // variables
-  const mainNav = document.querySelector('#main-navigation')
-  const mainMenu = mainNav.querySelector('ul')
-  const dropdownMenus = [...document.querySelectorAll('.has-dropdown button')]
-
-  // functions
-  const setActiveMenuItem = () => {
-    const mobileDesktopMenus = mainNav.querySelectorAll('nav > ul')
-    const currenPathname = window.location.pathname
-
-    mobileDesktopMenus.forEach((menu) => {
-      const menuItems = [...menu.querySelectorAll('a:not([rel*="external"])')] as HTMLAnchorElement[]
-
-      menuItems.forEach((menuItem) => {
-        if (currenPathname.includes(menuItem.pathname.replaceAll('/', '')) && menuItem.textContent !== 'Home') {
-          menuItem.classList.add('is-active')
-          menuItem.setAttribute('aria-current', 'page')
-        } else if (menuItem.textContent === 'Home' && currenPathname === '/') {
-          menuItem.classList.add('is-active')
-          menuItem.setAttribute('aria-current', 'page')
-        }
+  document.addEventListener('astro:page-load', () => {
+    // variables
+    const mainNav = document.querySelector('#main-navigation')
+    const mainMenu = mainNav.querySelector('ul')
+    const dropdownMenus = [...document.querySelectorAll('.has-dropdown button')]
+
+    // functions
+    const setActiveMenuItem = () => {
+      const mobileDesktopMenus = mainNav.querySelectorAll('nav > ul')
+      const currenPathname = window.location.pathname
+
+      mobileDesktopMenus.forEach((menu) => {
+        const menuItems = [...menu.querySelectorAll('a:not([rel*="external"])')] as HTMLAnchorElement[]
+
+        menuItems.forEach((menuItem) => {
+          if (currenPathname.includes(menuItem.pathname.replaceAll('/', '')) && menuItem.textContent !== 'Home') {
+            menuItem.classList.add('is-active')
+            menuItem.setAttribute('aria-current', 'page')
+          } else if (menuItem.textContent === 'Home' && currenPathname === '/') {
+            menuItem.classList.add('is-active')
+            menuItem.setAttribute('aria-current', 'page')
+          }
+        })
       })
-    })
-  }
+    }
 
-  const checkMenuSize = () => {
-    const mainNavWidth = mainNav.getBoundingClientRect().width
-    const desktopMenuWidth = document.querySelector('.desktop-menu').getBoundingClientRect().width
-    const logoWidthBuffer = 300
-    const totalMenuWidth = Math.round(desktopMenuWidth) + logoWidthBuffer
-
-    if (totalMenuWidth >= mainNavWidth) {
-      mainNav.classList.remove('is-desktop')
-      mainNav.classList.add('is-mobile')
-    } else if (totalMenuWidth <= mainNavWidth) {
-      mainNav.classList.add('is-desktop')
-      mainNav.classList.remove('is-mobile')
+    const checkMenuSize = () => {
+      const mainNavWidth = mainNav.getBoundingClientRect().width
+      const desktopMenuWidth = document.querySelector('.desktop-menu').getBoundingClientRect().width
+      const logoWidthBuffer = 300
+      const totalMenuWidth = Math.round(desktopMenuWidth) + logoWidthBuffer
+
+      if (totalMenuWidth >= mainNavWidth) {
+        mainNav.classList.remove('is-desktop')
+        mainNav.classList.add('is-mobile')
+      } else if (totalMenuWidth <= mainNavWidth) {
+        mainNav.classList.add('is-desktop')
+        mainNav.classList.remove('is-mobile')
+      }
     }
-  }
 
-  const isOutOfViewport = (element) => {
-    const elementBounds = element.getBoundingClientRect()
-    return elementBounds.right > (window.innerWidth || document.documentElement.clientWidth)
-  }
+    const isOutOfViewport = (element) => {
+      const elementBounds = element.getBoundingClientRect()
+      return elementBounds.right > (window.innerWidth || document.documentElement.clientWidth)
+    }
 
-  const openDropdownMenu = (dropdownMenu) => {
-    const dropdownList = dropdownMenu.parentNode.querySelector('ul')
+    const openDropdownMenu = (dropdownMenu) => {
+      const dropdownList = dropdownMenu.parentNode.querySelector('ul')
 
-    dropdownMenu.classList.add('show')
-    dropdownMenu.setAttribute('aria-expanded', 'true')
+      dropdownMenu.classList.add('show')
+      dropdownMenu.setAttribute('aria-expanded', 'true')
 
-    if (isOutOfViewport(dropdownList)) {
-      dropdownList.style.left = 'auto'
+      if (isOutOfViewport(dropdownList)) {
+        dropdownList.style.left = 'auto'
+      }
     }
-  }
 
-  const closeDropdownMenu = (dropdownMenu) => {
-    dropdownMenu.classList.remove('show')
-    dropdownMenu.setAttribute('aria-expanded', 'false')
-  }
-
-  const closeAllDropdownMenus = () => {
-    for (let i = 0; i < dropdownMenus.length; i++) {
-      closeDropdownMenu(dropdownMenus[i])
+    const closeDropdownMenu = (dropdownMenu) => {
+      dropdownMenu.classList.remove('show')
+      dropdownMenu.setAttribute('aria-expanded', 'false')
     }
-  }
 
-  const toggleDropdownMenu = (event) => {
-    if (event.target.getAttribute('aria-expanded') === 'false') {
-      closeAllDropdownMenus()
-      openDropdownMenu(event.target)
-    } else {
-      closeDropdownMenu(event.target)
+    const closeAllDropdownMenus = () => {
+      for (let i = 0; i < dropdownMenus.length; i++) {
+        closeDropdownMenu(dropdownMenus[i])
+      }
     }
-  }
-
-  // execution
-  mainMenu &&
-    mainMenu.addEventListener('keydown', (event) => {
-      const element = event.target as Element
-      const currentMenuItem = element.closest('li')
-      const menuItems = [...mainMenu.querySelectorAll('.menu-item')]
-      const currentDropdownMenu = element.closest('.has-dropdown button')
-      const currentDropdownMenuItem = element.closest('.has-dropdown li')
-      const currentIndex = menuItems.findIndex((item) => item === currentMenuItem)
 
-      const key = event.key
-      let targetItem
-
-      if (key === 'ArrowRight') {
-        if (menuItems.indexOf(currentMenuItem) === menuItems.length - 1) {
-          targetItem = menuItems[0]
-        } else {
-          targetItem = menuItems[currentIndex + 1]
-        }
+    const toggleDropdownMenu = (event) => {
+      if (event.target.getAttribute('aria-expanded') === 'false') {
+        closeAllDropdownMenus()
+        openDropdownMenu(event.target)
+      } else {
+        closeDropdownMenu(event.target)
       }
+    }
 
-      if (key === 'ArrowLeft') {
-        if (menuItems.indexOf(currentMenuItem) === 0) {
-          targetItem = menuItems[menuItems.length - 1]
-        } else {
-          targetItem = menuItems[currentIndex - 1]
+    // execution
+    mainMenu &&
+      mainMenu.addEventListener('keydown', (event) => {
+        const element = event.target as Element
+        const currentMenuItem = element.closest('li')
+        const menuItems = [...mainMenu.querySelectorAll('.menu-item')]
+        const currentDropdownMenu = element.closest('.has-dropdown button')
+        const currentDropdownMenuItem = element.closest('.has-dropdown li')
+        const currentIndex = menuItems.findIndex((item) => item === currentMenuItem)
+
+        const key = event.key
+        let targetItem
+
+        if (key === 'ArrowRight') {
+          if (menuItems.indexOf(currentMenuItem) === menuItems.length - 1) {
+            targetItem = menuItems[0]
+          } else {
+            targetItem = menuItems[currentIndex + 1]
+          }
         }
-      }
-
-      if (key === 'Escape') {
-        targetItem = menuItems[0]
-      }
 
-      if (currentDropdownMenu) {
-        const firstDropdownItem = currentDropdownMenu.nextElementSibling.querySelector('li')
-
-        if (key === 'ArrowDown') {
-          event.preventDefault()
-          openDropdownMenu(currentDropdownMenu)
-          targetItem = firstDropdownItem
+        if (key === 'ArrowLeft') {
+          if (menuItems.indexOf(currentMenuItem) === 0) {
+            targetItem = menuItems[menuItems.length - 1]
+          } else {
+            targetItem = menuItems[currentIndex - 1]
+          }
         }
 
         if (key === 'Escape') {
-          closeDropdownMenu(currentDropdownMenu)
+          targetItem = menuItems[0]
         }
-      }
 
-      if (currentDropdownMenuItem) {
-        const currentDropdownList = currentDropdownMenuItem.parentNode
-        const dropdownMenuItems = [...currentDropdownList.querySelectorAll('li')]
-        const currentIndex = dropdownMenuItems.findIndex((item) => item === currentDropdownMenuItem)
+        if (currentDropdownMenu) {
+          const firstDropdownItem = currentDropdownMenu.nextElementSibling.querySelector('li')
 
-        if (key === 'ArrowDown') {
-          event.preventDefault()
+          if (key === 'ArrowDown') {
+            event.preventDefault()
+            openDropdownMenu(currentDropdownMenu)
+            targetItem = firstDropdownItem
+          }
 
-          if (dropdownMenuItems.indexOf(currentDropdownMenuItem as HTMLLIElement) === dropdownMenuItems.length - 1) {
-            targetItem = dropdownMenuItems[0]
-          } else {
-            targetItem = dropdownMenuItems[currentIndex + 1]
+          if (key === 'Escape') {
+            closeDropdownMenu(currentDropdownMenu)
           }
         }
 
-        if (key === 'ArrowUp') {
-          event.preventDefault()
+        if (currentDropdownMenuItem) {
+          const currentDropdownList = currentDropdownMenuItem.parentNode
+          const dropdownMenuItems = [...currentDropdownList.querySelectorAll('li')]
+          const currentIndex = dropdownMenuItems.findIndex((item) => item === currentDropdownMenuItem)
 
-          if (dropdownMenuItems.indexOf(currentDropdownMenuItem as HTMLLIElement) === 0) {
-            targetItem = dropdownMenuItems[dropdownMenuItems.length - 1]
-          } else {
-            targetItem = dropdownMenuItems[currentIndex - 1]
+          if (key === 'ArrowDown') {
+            event.preventDefault()
+
+            if (dropdownMenuItems.indexOf(currentDropdownMenuItem as HTMLLIElement) === dropdownMenuItems.length - 1) {
+              targetItem = dropdownMenuItems[0]
+            } else {
+              targetItem = dropdownMenuItems[currentIndex + 1]
+            }
           }
-        }
 
-        if (key === 'Escape') {
-          const currentDropdownMenu = (currentDropdownList as Element).previousElementSibling
-          targetItem = currentDropdownMenu.parentNode
-          closeAllDropdownMenus()
+          if (key === 'ArrowUp') {
+            event.preventDefault()
+
+            if (dropdownMenuItems.indexOf(currentDropdownMenuItem as HTMLLIElement) === 0) {
+              targetItem = dropdownMenuItems[dropdownMenuItems.length - 1]
+            } else {
+              targetItem = dropdownMenuItems[currentIndex - 1]
+            }
+          }
+
+          if (key === 'Escape') {
+            const currentDropdownMenu = (currentDropdownList as Element).previousElementSibling
+            targetItem = currentDropdownMenu.parentNode
+            closeAllDropdownMenus()
+          }
         }
-      }
 
-      if (targetItem) {
-        targetItem.querySelector('a, button, input').focus()
-      }
-    })
+        if (targetItem) {
+          targetItem.querySelector('a, button, input').focus()
+        }
+      })
 
-  dropdownMenus &&
-    dropdownMenus.forEach((dropdownMenu) => {
-      dropdownMenu.addEventListener('click', toggleDropdownMenu)
-    })
+    dropdownMenus &&
+      dropdownMenus.forEach((dropdownMenu) => {
+        dropdownMenu.addEventListener('click', toggleDropdownMenu)
+      })
 
-  setActiveMenuItem()
-  checkMenuSize()
+    setActiveMenuItem()
+    checkMenuSize()
 
-  window.addEventListener('resize', checkMenuSize)
-  window.addEventListener('click', (event) => {
-    const element = event.target as Element
-    if (!element.hasAttribute('aria-haspopup') && !element.classList.contains('submenu-item')) {
-      closeAllDropdownMenus()
-    }
+    window.addEventListener('resize', checkMenuSize)
+    window.addEventListener('click', (event) => {
+      const element = event.target as Element
+      if (!element.hasAttribute('aria-haspopup') && !element.classList.contains('submenu-item')) {
+        closeAllDropdownMenus()
+      }
+    })
   })
 </script>
 
@@ -272,7 +274,6 @@ import logo from "../assets/img/logo.svg"
           text-decoration: none;
           font-size: 1.125rem;
           line-height: 1.6875rem;
-          transition: color 0.15s ease-in-out;
         }
 
         a:hover,
@@ -386,7 +387,6 @@ import logo from "../assets/img/logo.svg"
 
     svg path {
       fill: var(--action-color);
-      transition: fill 0.2s ease-in-out;
     }
 
     &:hover {
diff --git a/src/components/SiteMeta.astro b/src/components/SiteMeta.astro
index e88029f..2a0665f 100644
--- a/src/components/SiteMeta.astro
+++ b/src/components/SiteMeta.astro
@@ -1,4 +1,6 @@
 ---
+import { ViewTransitions } from 'astro:transitions'
+
 const { title, description, url, image, author } = Astro.props
 
 let subtitle = 'Accessible Astro Starter'
@@ -20,3 +22,5 @@ let subtitle = 'Accessible Astro Starter'
 
 <!-- page title -->
 <title>{title} - {subtitle}</title>
+
+<ViewTransitions />
diff --git a/src/layouts/DefaultLayout.astro b/src/layouts/DefaultLayout.astro
index bf182cf..2290c34 100644
--- a/src/layouts/DefaultLayout.astro
+++ b/src/layouts/DefaultLayout.astro
@@ -35,7 +35,7 @@ const {
   </head>
   <body>
     <Header />
-    <main id="main-content">
+    <main id="main-content" transition:animate="fade">
       <slot />
     </main>
     <Footer />