获取节点元素的方法


<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>获取元素及对应样式</title>
</head>
<style>
    .yellowColor{
        background-color: yellow;
    }

    .firstLine{
        background-color: red;
        color: green;
        font-size: 30px;
    }·
     #styleTest {
         color: #0f2f91;
         position: relative;
         left: 500px;
         font-size: 20px;
     }
</style>
<body>
<ul ></html>

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