首页 | 简单教程,简单编程

代码编辑器：

<style>
div {
    width: 100px;
    height: 100px;
    border: 1px solid black;
    margin: 10px;
    float: left;
    padding: 30px;
    text-align: center;
    background-color: lightgray;
}
p {
    background-color: white;
}
</style>
<h3>演示了 onmousemove, onmouseenter 和 onmouseover 的不同</h3>
<p> onmousemove 事件在鼠标移动到 div 元素上时触发</p>
<p> mouseenter 事件中有在鼠标指针进入 div 元素时触发。 </p>
<p> onmouseover 事件在鼠标指针进入 div 元素时触发,在子元素上也会触发(p 和 span)</p>
<div onmousemove="myMoveFunction()">
  <p>onmousemove: <br> <span id="demo">鼠标移动到我这!</span></p>
</div>
<div onmouseenter="myEnterFunction()">
  <p>onmouseenter: <br> <span id="demo2">鼠标移动到我这!</span></p>
</div>
<div onmouseover="myOverFunction()">
  <p>onmouseover: <br> <span id="demo3">鼠标移动到我这!</span></p>
</div>
<script>
x = 0;
y = 0;
z = 0;
function myMoveFunction() {
    document.getElementById("demo").innerHTML = z+=1;
}
function myEnterFunction() {
    document.getElementById("demo2").innerHTML = x+=1;
}
function myOverFunction() {
    document.getElementById("demo3").innerHTML = y+=1;
}
</script>

运行结果：