feat: grey out broken links

assets/styles/base.scss

@@ -185,6 +185,11 @@ article {
       padding: 0 0.1em;
       margin: auto -0.1em;
       border-radius: 3px;
+
+      &.broken {
+        opacity: 0.5;
+        background-color: transparent; 
+      }
     }
   }
   

content/_index.md

@@ -2,12 +2,13 @@
 title: 🪴 Quartz 3.1
 ---
 Host your second brain and [digital garden](https://jzhao.xyz/posts/digital-gardening) for free. Quartz features
-1. Extremely fast full-text search by pressing `/`
+1. Extremely fast full-text search by pressing `ctrl` + `k`
-2. Display for backlinks of each note
+2. Wikilink support
-3. Fully customizable local graph view
+3. Display for backlinks of each note
-4. Endlessly powerful page and theme customization using CSS
+4. Fully customizable local graph view
-5. Automatically generated tag and section lists of content
+5. Endlessly powerful page and theme customization using CSS
-6. Beautiful link previews
+6. Automatically generated tag and section lists of content
+7. Beautiful link previews
 
 ## Get Started
 > 📚 [Setup your own digital garden using Quartz](notes/setup.md)
@@ -18,7 +19,7 @@ Not convinced yet? Look at some [community digital gardens](notes/showcase.md) b
 If you prefer browsing the contents of this site through a list instead of a graph, you can find content lists here too:
 
 - [All Notes](/notes)
-- [Setup-related Notes](/tags/setup)
+- [Setup-related Notes](/tags/set)
 
 ## Troubleshooting
 - 🚧 [Troubleshooting and FAQ](notes/troubleshooting.md)

layouts/_default/_markup/render-link.html

@@ -6,6 +6,11 @@
 {{- else -}}
 {{$spacedurl := replace $trimmed "%20" " " }}
 {{$fixedUrl := (cond (hasPrefix $spacedurl "/") $spacedurl (print "/" $spacedurl)) | urlize}}
+{{$nonexistent := eq (.Page.GetPage $spacedurl).RelPermalink ""}}
 {{$rooted := default $spacedurl (strings.TrimRight "/" (.Page.GetPage $spacedurl).RelPermalink) }}
-<a href="{{$rooted}}" rel="noopener" class="internal-link" data-src="{{$rooted}}">{{ .Text | safeHTML }}</a>
+<a
+  {{if not $nonexistent}}href="{{$rooted}}"{{end}}
+  rel="noopener" class="internal-link{{if $nonexistent}} broken{{end}}"
+  data-src="{{$rooted}}">{{ .Text | safeHTML }}
+</a>
 {{- end -}}