const title = document.querySelector(".hello:first-child h1"); function titleClick() { title.style.color = 'blue'; } function titleMouseEnter() { title.innerHTML = "mouse is here@!" } function titleMouseLeave() { title.innerHTML = "mouse is gone!" } title.addEventListener("click", titleClick); title.addEventListener("mouseenter", titleMouseEnter); title.addEventListener("mouseleave", titleMouseL..