diff --git a/pagetop/src/html/opt_classes.rs b/pagetop/src/html/opt_classes.rs
index 46443df5..26005dd7 100644
--- a/pagetop/src/html/opt_classes.rs
+++ b/pagetop/src/html/opt_classes.rs
@@ -13,6 +13,7 @@ use crate::fn_builder;
 
 pub enum ClassesOp {
     Add,
+    AddFirst,
     Remove,
     Replace(String),
     Toggle,
@@ -44,6 +45,9 @@ impl OptionClasses {
             ClassesOp::Add => {
                 self.add(&classes, self.0.len());
             }
+            ClassesOp::AddFirst => {
+                self.add(&classes, 0);
+            }
             ClassesOp::Remove => {
                 for class in classes {
                     self.0.retain(|c| c.ne(&class.to_string()));