Create Jekyll hook to add header anchors based on the header IDs

Impement add-anchor-to-header-from-header-id.rb using regexps, like the
"official hooks" do:
- https://github.com/jekyll/jekyll-mentions
- https://github.com/jekyll/jemoji

1 files changed, 13 insertions, 0 deletions

diff --git a/styles.css b/styles.css
index 7a4d05f..687fa72 100644
--- a/styles.css
+++ b/styles.css
@@ -80,3 +80,16 @@ section.post-footer, div.footnotes {
   height: 22px;
   vertical-align: middle;
 }
+
+a.header-anchor {
+  color: black;
+  text-decoration: none;
+}
+
+a.header-anchor img {
+  visibility: hidden;
+}
+
+a.header-anchor:hover img {
+  visibility: visible;
+}