js实现鼠标经过变色

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Mouseover Color Change</title>
<style>
  .item {
    width: 100px;
    height: 100px;
    background-color: blue;
    margin: 10px;
  }
</style>
</head>
<body>

<div class="item" onmouseover="changeColor(this, 'red')" onmouseout="resetColor(this, 'blue')"></div>
<div class="item" onmouseover="changeColor(this, 'green')" onmouseout="resetColor(this, 'blue')"></div>
<div class="item" onmouseover="changeColor(this, 'yellow')" onmouseout="resetColor(this, 'blue')"></div>

<script>
function changeColor(element, color) {
  element.style.backgroundColor = color;
}

function resetColor(element, color) {
  element.style.backgroundColor = color;
}
</script>

</body>
</html>

.item {
  transition: background-color 0.3s ease;
}

document.body.addEventListener('mouseover', function(event) {
  if (event.target.classList.contains('item')) {
    changeColor(event.target, event.target.dataset.color);
  }
});

document.body.addEventListener('mouseout', function(event) {
  if (event.target.classList.contains('item')) {
    resetColor(event.target, 'blue');
  }
});

<div class="item" data-color="red"></div>
<div class="item" data-color="green"></div>
<div class="item" data-color="yellow"></div>