Actually that didn't do anything.

static/js/code.js

@@ -37,10 +37,6 @@ class GetJson {
     this.url = url;
   }
 
-  get item() {
-    return this.item;
-  }
-
   async item() {
     const resp = await fetch(`${this.url}`);
     console.assert(resp.status == 200, "failed to get it");