feat: allow favicon to be specified in text format

Author: g1eny0ung

docs/pages/CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 - Remove author display if both post author and site author are not set [#354](https://github.com/g1eny0ung/hugo-theme-dream/pull/354)
 - Prioritize page descriptions over page summaries [#356](https://github.com/g1eny0ung/hugo-theme-dream/pull/356)
+- Allow favicon to be specified in text format
 
 ## [3.10.0] - 2025-01-07
 

docs/pages/params-configurations.mdx

@@ -199,7 +199,15 @@ site footer.
 
 ### favicon
 
-Custom the [favicon](https://en.wikipedia.org/wiki/Favicon), place it in the `static` folder.
+Custom the [favicon](https://en.wikipedia.org/wiki/Favicon) of your site, place it in the `static` folder.
+
+<Callout type="info">
+You can also specify the favicon in text format (starting with `<link`), for example:
+
+```html
+<link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%2210 0 100 100%22><text y=%22.90em%22 font-size=%2290%22>🌱</text></svg>"></link>
+```
+</Callout>
 
 ### customSyntaxHighlighting
 

layouts/partials/head.html

@@ -1,5 +1,9 @@
-{{ if isset site.Params "favicon" }}
-<link href="{{ site.Params.favicon | relURL }}" rel="icon" type="image/x-icon" />
+{{ with site.Params.favicon }}
+  {{ if hasPrefix . "<link" }}
+    {{ . | safeHTML }}
+  {{ else }}
+    <link href="{{ . | relURL }}" rel="icon" type="image/x-icon" />
+  {{ end }}
 {{ end }}
 
 <link rel="canonical" href="{{ .Permalink }}" />