Adds spoilers support

src/utils/markdown.rs

@@ -69,6 +69,7 @@ pub fn get_options(path: Option<FilePath>, metadata_type: MType) -> ComrakOption
             .math_dollars(true)
             .underline(true)
             .subscript(true)
+            .spoiler(true)
             .maybe_link_url_rewriter(match metadata_type {
                 MType::Cours => Some(Arc::new(move |url: &str| {
                     // Exclude external links

static/css/markdown.css

@@ -284,6 +284,21 @@ table:not(.hljs-ln) tr th:last-child {
   border-right: 0;
 }
 
+/* Spoilers */
+.spoiler {
+  background-color: var(--font-color);
+  color: transparent;
+  border-radius: 3px;
+  cursor: pointer;
+  transition: all 0.3s ease;
+}
+
+.spoiler:hover,
+.spoiler:focus {
+  background-color: var(--background);
+  color: var(--font-color);
+}
+
 @media print {
   /* Better colors for paper */
   blockquote {
@@ -328,6 +343,12 @@ table:not(.hljs-ln) tr th:last-child {
     visibility: hidden;
   }
 
+  /* Reveals all spoilers */
+  .spoiler {
+    background-color: var(--background);
+    color: var(--font-color);
+  }
+
   @page {
     @bottom-right {
       content: counter(page) "/" counter(pages);