Initial commit

quartz/components/scripts/darkmode.inline.ts

@@ -0,0 +1,37 @@
+const userPref = window.matchMedia("(prefers-color-scheme: light)").matches ? "light" : "dark"
+const currentTheme = localStorage.getItem("theme") ?? userPref
+document.documentElement.setAttribute("saved-theme", currentTheme)
+
+const emitThemeChangeEvent = (theme: "light" | "dark") => {
+  const event: CustomEventMap["themechange"] = new CustomEvent("themechange", {
+    detail: { theme },
+  })
+  document.dispatchEvent(event)
+}
+
+document.addEventListener("nav", () => {
+  const switchTheme = () => {
+    const newTheme =
+      document.documentElement.getAttribute("saved-theme") === "dark" ? "light" : "dark"
+    document.documentElement.setAttribute("saved-theme", newTheme)
+    localStorage.setItem("theme", newTheme)
+    emitThemeChangeEvent(newTheme)
+  }
+
+  const themeChange = (e: MediaQueryListEvent) => {
+    const newTheme = e.matches ? "dark" : "light"
+    document.documentElement.setAttribute("saved-theme", newTheme)
+    localStorage.setItem("theme", newTheme)
+    emitThemeChangeEvent(newTheme)
+  }
+
+  for (const darkmodeButton of document.getElementsByClassName("darkmode")) {
+    darkmodeButton.addEventListener("click", switchTheme)
+    window.addCleanup(() => darkmodeButton.removeEventListener("click", switchTheme))
+  }
+
+  // Listen for changes in prefers-color-scheme
+  const colorSchemeMediaQuery = window.matchMedia("(prefers-color-scheme: dark)")
+  colorSchemeMediaQuery.addEventListener("change", themeChange)
+  window.addCleanup(() => colorSchemeMediaQuery.removeEventListener("change", themeChange))
+})