Merge a295d46018 into c99c8070f2

docs/configuration.md

@@ -23,6 +23,7 @@ This part of the configuration concerns anything that can affect the whole site.
 - `pageTitle`: title of the site. This is also used when generating the [[RSS Feed]] for your site.
 - `pageTitleSuffix`: a string added to the end of the page title. This only applies to the browser tab title, not the title shown at the top of the page.
 - `enableSPA`: whether to enable [[SPA Routing]] on your site.
+- `enableViewTransitions`: whether to enable browser-native [[View Transitions]] on your site.
 - `enablePopovers`: whether to enable [[popover previews]] on your site.
 - `analytics`: what to use for analytics on your site. Values can be
   - `null`: don't use analytics;

docs/features/View Transitions.md

@@ -0,0 +1,63 @@
+---
+title: "View Transitions"
+---
+
+View Transitions provide smooth, animated page transitions when navigating between pages in Quartz. This progressively enhances the [[SPA Routing]] experience by utilizing the browser-native [View Transitions API](https://developer.mozilla.org/en-US/docs/Web/API/View_Transition_API) where available.
+
+When navigating between pages, if the View Transitions API is supported and enabled, Quartz will wrap the content update in a view transition. This creates smooth, customizable animations as the page content changes, providing a more polished and app-like experience.
+
+Under the hood, Quartz uses [[SPA Routing]] to intercept link clicks and perform client-side navigation. The View Transitions feature builds on top of this by wrapping the DOM updates in `document.startViewTransition()`, allowing the browser to automatically animate the changes between the old and new page states.
+
+> [!info]
+> View Transitions require [[SPA Routing]] to be enabled in the [[configuration]]. Browsers that don't support the View Transitions API will fall back to instant page updates without animations.
+
+## Customization
+
+Quartz assigns appropriate `view-transition-name` properties to its component, allowing you to create custom animations for different parts of the page.
+
+### Styling Transitions
+
+You can customize the behavior of these transitions by adding CSS to your `quartz/styles/custom.scss` file. For example:
+
+```scss title="quartz/styles/custom.scss"
+::view-transition-old(root),
+::view-transition-new(root) {
+  animation-duration: 0.5s;
+}
+```
+
+For more advanced customization options, see the [MDN documentation on customizing view transition animations](https://developer.mozilla.org/en-US/docs/Web/API/View_Transition_API/Using#customizing_your_animations).
+
+### Programmatic Transitions
+
+When [[creating components|creating your own components]], you can use the `startViewTransition` utility function to wrap DOM updates in a view transition. This ensures your custom scripts respect your view transition settings.
+
+```typescript
+import { startViewTransition } from "./scripts/util"
+
+// Wrap your DOM update in a view transition
+startViewTransition(() => {
+  // Your DOM updates here
+  element.textContent = "New content"
+})
+```
+
+The `startViewTransition` function will automatically use the View Transitions API if the browser is supported, otherwise it will fallback to eager execution.
+
+## Configuration
+
+View Transitions require both [[SPA Routing]] and the View Transitions feature to be enabled in the [[configuration]]:
+
+1. Enable [[SPA Routing]]: set the `enableSPA` field to `true`
+2. Enable View Transitions: set the `enableViewTransitions` field to `true`
+
+```typescript title="quartz.config.ts"
+const config: QuartzConfig = {
+  configuration: {
+    // ...
+    enableSPA: true,
+    enableViewTransitions: true,
+    // ...
+  },
+}
+```

quartz.config.ts

@@ -11,6 +11,7 @@ const config: QuartzConfig = {
     pageTitle: "Quartz 4",
     pageTitleSuffix: "",
     enableSPA: true,
+    enableViewTransitions: false,
     enablePopovers: true,
     analytics: {
       provider: "plausible",

quartz/cfg.ts

@@ -61,6 +61,12 @@ export interface GlobalConfiguration {
   pageTitleSuffix?: string
   /** Whether to enable single-page-app style rendering. this prevents flashes of unstyled content and improves smoothness of Quartz */
   enableSPA: boolean
+  /**
+   * `enableSPA: true` required; Whether to enable browser-native view transitions for single-page-app style rendering.
+   *
+   * Customizing your animations: https://developer.mozilla.org/en-US/docs/Web/API/View_Transition_API/Using#customizing_your_animations.
+   */
+  enableViewTransitions: boolean
   /** Whether to display Wikipedia-style popovers when hovering over links */
   enablePopovers: boolean
   /** Analytics mode */

quartz/components/renderPage.tsx

@@ -262,7 +262,7 @@ export function renderPage(
   const doc = (
     <html lang={lang} dir={direction}>
       <Head {...componentData} />
-      <body data-slug={slug}>
+      <body data-slug={slug} data-view-transitions={cfg.enableViewTransitions}>
         <div id="quartz-root" class="page">
           <Body {...componentData}>
             {LeftComponent}

quartz/components/scripts/spa.inline.ts

@@ -1,6 +1,6 @@
 import micromorph from "micromorph"
 import { FullSlug, RelativeURL, getFullSlug, normalizeRelativeURLs } from "../../util/path"
-import { fetchCanonical } from "./util"
+import { fetchCanonical, startViewTransition } from "./util"
 
 // adapted from `micromorph`
 // https://github.com/natemoo-re/micromorph
@@ -102,6 +102,7 @@ async function _navigate(url: URL, isBack: boolean = false) {
   html.body.appendChild(announcer)
 
   // morph body
+  startViewTransition(() => {
     micromorph(document.body, html.body)
 
     // scroll into place and add history
@@ -128,6 +129,7 @@ async function _navigate(url: URL, isBack: boolean = false) {
 
     notifyNav(getFullSlug(window))
     delete announcer.dataset.persist
+  })
 }
 
 async function navigate(url: URL, isBack: boolean = false) {

quartz/components/scripts/util.ts

@@ -44,3 +44,17 @@ export async function fetchCanonical(url: URL): Promise<Response> {
   const [_, redirect] = text.match(canonicalRegex) ?? []
   return redirect ? fetch(`${new URL(redirect, url)}`) : res
 }
+
+/**
+ * Wraps a DOM update in a View Transition if supported by the browser and enabled in config.
+ * Falls back to immediate execution if the API is unavailable or disabled.
+ */
+export function startViewTransition(callback: () => void): void {
+  const enableViewTransitions = document.body.dataset.viewTransitions === "true"
+
+  if (enableViewTransitions && document.startViewTransition) {
+    document.startViewTransition(() => callback())
+  } else {
+    callback()
+  }
+}

quartz/components/styles/backlinks.scss

@@ -2,6 +2,7 @@
 
 .backlinks {
   flex-direction: column;
+  view-transition-name: backlinks;
 
   & > h3 {
     font-size: 1rem;

quartz/components/styles/comments.scss

@@ -0,0 +1,3 @@
+.giscus {
+  view-transition-name: giscus;
+}

quartz/components/styles/darkmode.scss

@@ -9,6 +9,7 @@
   margin: 0;
   text-align: inherit;
   flex-shrink: 0;
+  view-transition-name: darkmode;
 
   & svg {
     position: absolute;

quartz/components/styles/explorer.scss

@@ -30,9 +30,10 @@
   display: flex;
   flex-direction: column;
   overflow-y: hidden;
-
   min-height: 1.2rem;
   flex: 0 1 auto;
+  view-transition-name: explorer;
+
   &.collapsed {
     flex: 0 1 1.2rem;
     & .fold {

quartz/components/styles/footer.scss

@@ -2,6 +2,7 @@ footer {
   text-align: left;
   margin-bottom: 4rem;
   opacity: 0.7;
+  view-transition-name: footer;
 
   & ul {
     list-style: none;

quartz/components/styles/graph.scss

@@ -1,6 +1,10 @@
 @use "../../styles/variables.scss" as *;
 
 .graph {
+  &:not(:has(.active)) {
+    view-transition-name: graph;
+  }
+
   & > h3 {
     font-size: 1rem;
     margin: 0;
@@ -64,6 +68,7 @@
       transform: translate(-50%, -50%);
       height: 80vh;
       width: 80vw;
+      overflow: hidden;
 
       @media all and not ($desktop) {
         width: 90%;

quartz/components/styles/readermode.scss

@@ -9,6 +9,7 @@
   margin: 0;
   text-align: inherit;
   flex-shrink: 0;
+  view-transition-name: readermode;
 
   & svg {
     position: absolute;

quartz/components/styles/recentNotes.scss

@@ -1,4 +1,6 @@
 .recent-notes {
+  view-transition-name: recent-notes;
+
   & > h3 {
     margin: 0.5rem 0 0 0;
     font-size: 1rem;

quartz/components/styles/toc.scss

@@ -6,6 +6,8 @@
   overflow-y: hidden;
   min-height: 1.4rem;
   flex: 0 0.5 auto;
+  view-transition-name: toc;
+
   &:has(button.toc-header.collapsed) {
     flex: 0 1 1.4rem;
   }

quartz/styles/base.scss

@@ -4,6 +4,10 @@
 @use "./syntax.scss";
 @use "./callouts.scss";
 
+::view-transition {
+  pointer-events: none;
+}
+
 html {
   scroll-behavior: smooth;
   text-size-adjust: none;