'use strict';document.addEventListener('DOMContentLoaded',()=>{const prelude=document.querySelector('#prelude');if(prelude){const links=prelude.querySelectorAll('a');links.forEach((link)=>{link.classList.add('hidden');link.addEventListener('focus',()=>{links.forEach((link)=>link.classList.remove('hidden'));});});document.querySelector('body').addEventListener('click',(e)=>{if(e.target.matches('#prelude a[href="#help"]')){e.preventDefault();document.querySelector('#help-button a').focus();}});}});