some fix from pr

src/app.js

@@ -1,7 +1,6 @@
 import { max, sum } from './functions/util.js';
 import { summary } from './functions/summary.js'
 import Life from './life.js'
-import { hideBanners } from './';
 
 class App{
     constructor(){

src/index.js

@@ -4,7 +4,7 @@ import App from '../src/app.js';
 window.json = async fileName => await (await fetch(`../data/${fileName}.json`)).json();
 
 // Pssst, I've created a github package - https://github.com/brookesb91/dismissible
-export const hideBanners = (e) => {
+window.hideBanners = (e) => {
     document
         .querySelectorAll(".banner.visible")
         .forEach((b) => b.classList.remove("visible"));