範例如下
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>uHost</title>
<link rel="shortcut icon" href="favicon.png">
<link rel="stylesheet" href="index.css">
</head>
<body>
<main>
<section>
<h1>Get the freedom you deserve.</h1>
</section>
<section class="test_class">
<h1 class="test_class_h1">Use class</h1>
</section>
<section id="test_id">
<h1 id="test_id_h1">Use id</h1>
</section>
<button disabled>Use attribute</button>
</main>
</body>
</html>
index.css
section{
background-color: bisque;
}
h1{
color: aqua;
}
.test_class{
background-color: cornsilk;
}
.test_class_h1{
color: aquamarine;
}
#test_id{
background-color: black;
}
#test_id_h1{
color: aliceblue;
}
button[disabled]{
color: aquamarine;
}
section 代表選擇所有 section element
.test_class 代表選擇所有class為test_class的element
#test_id 代表選擇所有id為test_id的element
button[disabled] 代表選擇所有 attribute有disabled的 button
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