sparlex.js
let main = document.querySelector("#mainList");let sub = document.querySelector("#subList");main.addEventListener("click",showSubList);let cnt = 0;function showSubList() { cnt++; if (cnt % 2 == 1) { sub.classList.toggle("display_none"); }}let left = document.querySelector(".left");let right = document.querySelector(".right");let slide = document.querySelectorAll(".slide");left.addEventList..