Show progress on route change

.vitepress/theme/composables/nprogress.ts

@@ -0,0 +1,23 @@
+import nprogress, { type NProgress } from "nprogress";
+import type { EnhanceAppContext } from "vitepress";
+
+export function loadProgress(router: EnhanceAppContext["router"]): NProgress {
+  if (typeof window === "undefined") return;
+
+  setTimeout(() => {
+    nprogress.configure({ showSpinner: false });
+
+    const cacheBeforeRouteChange = router.onBeforeRouteChange;
+    const cacheAfterRouteChange = router.onAfterRouteChanged;
+    router.onBeforeRouteChange = (to) => {
+      nprogress.start();
+      cacheBeforeRouteChange?.(to);
+    };
+    router.onAfterRouteChanged = (to) => {
+      nprogress.done();
+      cacheAfterRouteChange?.(to);
+    };
+  });
+
+  return nprogress;
+}

.vitepress/theme/index.ts

@@ -1,11 +1,14 @@
 import { type Theme } from "vitepress";
 import DefaultTheme from "vitepress/theme";
 import Layout from "./Layout.vue";
+import { loadProgress } from "./composables/nprogress";
 import "./style.css";
 import "uno.css";
 
 export default {
   extends: DefaultTheme,
   Layout,
-  enhanceApp({ app, router, siteData }) {},
+  enhanceApp({ router }) {
+    loadProgress(router);
+  },
 } satisfies Theme;

.vitepress/theme/style.css

@@ -143,3 +143,85 @@
   width: 0px;
   white-space: pre-wrap;
 }
+
+/* Make clicks pass-through */
+#nprogress {
+  pointer-events: none;
+}
+
+#nprogress .bar {
+  background: var(--vp-c-brand-1);
+  position: fixed;
+  z-index: 1031;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 2px;
+}
+
+/* Fancy blur effect */
+#nprogress .peg {
+  display: block;
+  position: absolute;
+  right: 0px;
+  width: 100px;
+  height: 100%;
+  box-shadow:
+    0 0 10px var(--vp-c-brand-1),
+    0 0 5px var(--vp-c-brand-1);
+  opacity: 1;
+
+  -webkit-transform: rotate(3deg) translate(0px, -4px);
+  -ms-transform: rotate(3deg) translate(0px, -4px);
+  transform: rotate(3deg) translate(0px, -4px);
+}
+
+/* Remove these to get rid of the spinner */
+#nprogress .spinner {
+  display: block;
+  position: fixed;
+  z-index: 1031;
+  top: 15px;
+  right: 15px;
+}
+
+#nprogress .spinner-icon {
+  width: 18px;
+  height: 18px;
+  box-sizing: border-box;
+
+  border: solid 2px transparent;
+  border-top-color: var(--vp-c-brand);
+  border-left-color: var(--vp-c-brand);
+  border-radius: 50%;
+
+  -webkit-animation: nprogress-spinner 400ms linear infinite;
+  animation: nprogress-spinner 400ms linear infinite;
+}
+
+.nprogress-custom-parent {
+  overflow: hidden;
+  position: relative;
+}
+
+.nprogress-custom-parent #nprogress .spinner,
+.nprogress-custom-parent #nprogress .bar {
+  position: absolute;
+}
+
+@-webkit-keyframes nprogress-spinner {
+  0% {
+    -webkit-transform: rotate(0deg);
+  }
+  100% {
+    -webkit-transform: rotate(360deg);
+  }
+}
+@keyframes nprogress-spinner {
+  0% {
+    transform: rotate(0deg);
+  }
+  100% {
+    transform: rotate(360deg);
+  }
+}