diff --git a/src/assets/javascripts/index.ts b/src/assets/javascripts/index.ts
index 8037b001d..529a6482c 100644
--- a/src/assets/javascripts/index.ts
+++ b/src/assets/javascripts/index.ts
@@ -73,7 +73,7 @@ import {
   watchComponentMap
 } from "components2"
 import { mountClipboard } from "./integrations/clipboard"
-import { patchTables } from "patches/table"
+import { patchTables, patchDetails } from "patches"
 
 /* ----------------------------------------------------------------------------
  * Types
@@ -268,6 +268,9 @@ export function initialize(config: unknown) {
 
   /* ----------------------------------------------------------------------- */
 
+  // TODO: general keyboard handler...
+  // put into main!?
+
   //   search$
   //     .pipe(
   //       filter(not),
@@ -330,8 +333,11 @@ export function initialize(config: unknown) {
   })
 
   // TODO: this is just a re-rendering patch...
-  // patchTables({ document$ })
-  //   .subscribe(console.log)
+  patchTables({ document$ })
+    .subscribe(console.log)
+
+  patchDetails({ document$ })
+    .subscribe(console.log)
 
   // /* Wrap all data tables for better overflow scrolling */
   // const placeholder = document.createElement("table")
diff --git a/src/assets/javascripts/integrations/search/_/index.ts b/src/assets/javascripts/integrations/search/_/index.ts
index 1b9e7de13..e5e70e2a0 100644
--- a/src/assets/javascripts/integrations/search/_/index.ts
+++ b/src/assets/javascripts/integrations/search/_/index.ts
@@ -89,6 +89,12 @@ export interface SearchResult {
  * Class
  * ------------------------------------------------------------------------- */
 
+/**
+ * Search index
+ *
+ * Note that `lunr` is injected via Webpack, as it will otherwise also be
+ * bundled in the application bundle.
+ */
 export class SearchIndex {
 
   /**
diff --git a/src/assets/javascripts/patches/details/index.ts b/src/assets/javascripts/patches/details/index.ts
new file mode 100644
index 000000000..d66c00365
--- /dev/null
+++ b/src/assets/javascripts/patches/details/index.ts
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+import { identity } from "ramda"
+import { Observable, fromEvent, merge } from "rxjs"
+import {
+  filter,
+  map,
+  shareReplay,
+  switchMapTo,
+  tap
+} from "rxjs/operators"
+
+import { getElements, watchMedia } from "observables"
+
+/* ----------------------------------------------------------------------------
+ * Helper types
+ * ------------------------------------------------------------------------- */
+
+/**
+ * Mount options
+ */
+interface MountOptions {
+  document$: Observable<Document>      /* Document observable */
+}
+
+/* ----------------------------------------------------------------------------
+ * Functions
+ * ------------------------------------------------------------------------- */
+
+/**
+ * Patch all `details` elements
+ *
+ * @param options - Options
+ *
+ * @return Details elements observable
+ */
+export function patchDetails(
+  { document$ }: MountOptions
+): Observable<HTMLDetailsElement[]> {
+  return merge(
+    watchMedia("print").pipe(filter(identity)), // Webkit
+    fromEvent(window, "beforeprint")            // IE, FF
+  )
+    .pipe(
+      switchMapTo(document$),
+      map(() => getElements<HTMLDetailsElement>("details")),
+      tap(els => {
+        for (const detail of els)
+          detail.setAttribute("open", "")
+      }),
+      shareReplay(1)
+    )
+}
diff --git a/src/assets/javascripts/patches/index.ts b/src/assets/javascripts/patches/index.ts
index 749065d5a..49a308501 100644
--- a/src/assets/javascripts/patches/index.ts
+++ b/src/assets/javascripts/patches/index.ts
@@ -20,4 +20,5 @@
  * IN THE SOFTWARE.
  */
 
+export * from "./details"
 export * from "./table"
diff --git a/src/assets/javascripts/patches/table/index.ts b/src/assets/javascripts/patches/table/index.ts
index ceef3aaa2..988c7a7d9 100644
--- a/src/assets/javascripts/patches/table/index.ts
+++ b/src/assets/javascripts/patches/table/index.ts
@@ -51,11 +51,11 @@ interface MountOptions {
 export function patchTables(
   { document$ }: MountOptions
 ): Observable<HTMLTableElement[]> {
+  const placeholder = document.createElement("table")
   return document$
     .pipe(
       map(() => getElements<HTMLTableElement>("table:not([class])")),
       tap(els => {
-        const placeholder = document.createElement("table")
         for (const el of els) {
           el.replaceWith(placeholder)
           placeholder.replaceWith(renderTable(el))