diff --git a/js/src/common/Component.ts b/js/src/common/Component.ts
index ad9e6d87f..765abc60e 100644
--- a/js/src/common/Component.ts
+++ b/js/src/common/Component.ts
@@ -64,7 +64,7 @@ export default abstract class Component<T extends ComponentAttrs = any> implemen
   }
 
   private setAttrs(attrs: T = {} as T) {
-    this.initAttrs(attrs);
+    this.constructor.initAttrs(attrs);
 
     if (attrs) {
       if ('children' in attrs) {
diff --git a/js/src/common/components/LinkButton.js b/js/src/common/components/LinkButton.js
index 741bc5ceb..edd272fd4 100644
--- a/js/src/common/components/LinkButton.js
+++ b/js/src/common/components/LinkButton.js
@@ -16,7 +16,7 @@ export default class LinkButton extends Button {
   static initAttrs(attrs) {
     super.initAttrs(attrs);
 
-    attrs.active = this.constructor.isActive(attrs);
+    attrs.active = this.isActive(attrs);
   }
 
   view(vnode) {