huge upgrade to theme and pagefind search bar.

themes/hugo-book.backup/assets/search-data.json

@@ -0,0 +1,17 @@
+[
+{{- $pages := where .Site.Pages "Kind" "in" (slice "page" "section") -}}
+{{- $pages = where $pages "Params.bookSearchExclude" "!=" true -}}
+{{/* Remove until we know why it does not work, see https://github.com/alex-shpak/hugo-book/issues/528 */}}
+{{/*- $pages = where $pages "Content" "not in" (slice nil "") -*/}}
+{{- $pages = where $pages "Content" "!=" "" -}}
+
+{{ range $index, $page := $pages }}
+{{ if gt $index 0}},{{end}} {
+    "id": {{ $index }},
+    "href": "{{ $page.RelPermalink }}",
+    "title": {{ (partial "docs/title" $page) | jsonify }},
+    "section": {{ (partial "docs/title" $page.Parent) | default $.Site.Title | jsonify }},
+    "content": {{ $page.Plain | jsonify }}
+}
+{{- end -}}
+]