From 5a5ef670fee5f5f65981801a7ec9c2e563fe99ad Mon Sep 17 00:00:00 2001
From: Francisco Gama T. R. <francisco@ironik.org>
Date: Tue, 03 Dec 2024 06:56:59 +0000
Subject: [PATCH] fix(darkmode): check for null (#1531)

---
 quartz/components/scripts/spa.inline.ts |   21 +++++++++++++++++----
 1 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/quartz/components/scripts/spa.inline.ts b/quartz/components/scripts/spa.inline.ts
index 0318ec3..1790bca 100644
--- a/quartz/components/scripts/spa.inline.ts
+++ b/quartz/components/scripts/spa.inline.ts
@@ -1,10 +1,8 @@
 import micromorph from "micromorph"
-import { FullSlug, RelativeURL, getFullSlug } from "../../util/path"
-import { normalizeRelativeURLs } from "./popover.inline"
+import { FullSlug, RelativeURL, getFullSlug, normalizeRelativeURLs } from "../../util/path"
 
 // adapted from `micromorph`
 // https://github.com/natemoo-re/micromorph
-
 const NODE_TYPE_ELEMENT = 1
 let announcer = document.createElement("route-announcer")
 const isElement = (target: EventTarget | null): target is Element =>
@@ -41,17 +39,31 @@
   document.dispatchEvent(event)
 }
 
+const cleanupFns: Set<(...args: any[]) => void> = new Set()
+window.addCleanup = (fn) => cleanupFns.add(fn)
+
 let p: DOMParser
 async function navigate(url: URL, isBack: boolean = false) {
   p = p || new DOMParser()
   const contents = await fetch(`${url}`)
-    .then((res) => res.text())
+    .then((res) => {
+      const contentType = res.headers.get("content-type")
+      if (contentType?.startsWith("text/html")) {
+        return res.text()
+      } else {
+        window.location.assign(url)
+      }
+    })
     .catch(() => {
       window.location.assign(url)
     })
 
   if (!contents) return
 
+  // cleanup old
+  cleanupFns.forEach((fn) => fn())
+  cleanupFns.clear()
+
   const html = p.parseFromString(contents, "text/html")
   normalizeRelativeURLs(html, url)
 
@@ -109,6 +121,7 @@
       if (isSamePage(url) && url.hash) {
         const el = document.getElementById(decodeURIComponent(url.hash.substring(1)))
         el?.scrollIntoView()
+        history.pushState({}, "", url)
         return
       }
 

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