Create popup component and implement bestr api calls

popup.js

@@ -0,0 +1,16 @@
+class MyComponent extends HTMLElement {
+  static get observedAttributes() {
+    return ['my-attribute']
+  }
+
+  attributeChangedCallback(name, oldValue, newValue) {
+    if (name === 'my-attribute') {
+      console.log(
+        `Value of my-attribute changed from ${oldValue} to ${newValue}`
+      )
+      // You can perform some action based on the new value here
+    }
+  }
+}
+
+customElements.define('my-component', MyComponent)