diff --git a/main.js b/main.js
index bbd466d..26bca04 100644
--- a/main.js
+++ b/main.js
@@ -12,7 +12,7 @@ export class div {
     static get onclick() {
         console.log('onclick event')
         return {
-            stop: function(event) {
+            stop: function (event) {
                 console.log(`Stop event: ${event}`)
                 return div
             }
@@ -22,10 +22,10 @@ export class div {
     static get onkeydown() {
         console.log('onkeydown event')
         return {
-            esc: function() {
+            esc: function () {
                 console.log('esc event')
                 return {
-                    keydown: function() {
+                    keydown: function () {
                         console.log('keydown event')
                         return div
                     }
@@ -39,3 +39,11 @@ export class div {
         return this
     }
 }
+
+export class button extends div { }
+export class span extends div { }
+
+export class header extends div { }
+export class footer extends div { }
+export class main extends div { }
+