add scroll to top

src/router.ts

@@ -14,7 +14,18 @@ const router = new Router({
     { path: "/p", component: Single },
     { path: "/p/:y/:mo/:name", component: Single },
     { path: "/about", component: About }
-  ]
+  ],
+  scrollBehavior(to, from, savedPosition) {
+    if (savedPosition) {
+      return savedPosition;
+    } else if (to.hash) {
+      return {
+        selector: to.hash
+      };
+    } else {
+      return { x: 0, y: 0 }
+    }
+  }
 });
 
 document.addEventListener("click", (ev) => {