commento.js: add scroll into view based on hash

frontend/js/commento.js

@@ -1523,6 +1523,7 @@
     attrSet(footer, "style", "");
 
     nameWidthFix();
+    loadHash();
   }
 
 
@@ -1570,6 +1571,19 @@
   }
 
 
+  function loadHash() {
+    if (window.location.hash && window.location.hash.startsWith("#commento-")) {
+      var el = $(ID_CARD + window.location.hash.split("-")[1]);
+      if (el === null) {
+        return;
+      }
+
+      classAdd(el, "highlighted");
+      el.scrollIntoView(true);
+    }
+  }
+
+
   global.main = function(callback) {
     root = $(ID_ROOT);
     if (root === null) {

frontend/sass/commento.scss

@@ -55,4 +55,8 @@
     font-weight: 700;
     margin-top: 16px;
   }
+
+  .commento-highlighted {
+    background: $yellow-0;
+  }
 }