触发取消悬停？

// HTML
<div id="hoverElement">悬停在我上面</div>

// CSS
#hoverElement {
  background-color: blue;
  color: white;
}

// JavaScript
var hoverElement = document.getElementById("hoverElement");

hoverElement.addEventListener("mouseover", function() {
  // 鼠标悬停时触发的事件
  hoverElement.style.backgroundColor = "red";
});

hoverElement.addEventListener("mouseout", function() {
  // 鼠标取消悬停时触发的事件
  hoverElement.style.backgroundColor = "blue";
});