const link = document.querySelector(".link");
console.log(link.classList);

const hasActiveClass = link.classList.contains("is-active");
console.log(`hasActiveClass - ${hasActiveClass}`);

link.classList.add("special");
console.log(link.classList);

link.classList.remove("is-active");
console.log(link.classList);

link.classList.toggle("is-active");
console.log(link.classList);

link.classList.replace("special", "regular");
console.log(link.classList);