Xem ví dụ

<!DOCTYPE html>
<html>
<head>
    <title>Xem ví dụ</title>
    <style type="text/css">
        {
            background-color:pink;
        }
    </style>
</head>
<body>
    <div class="html">
        <h1 class="content" title="hello">Tài liệu học HTML</h1>
    </div>
    <div class="css">
        <h1 class="content" title="hello">Tài liệu học CSS</h1>
    </div>
</body>
</html>


h1	.content	[title]
h1.content	.content[title]	[title="hello"]
h1.content[title]	.content[title="hello"]	[title~="hello"]
h1.content[title="hello"]	.content[title~="hello"]	[title*="hello"]
h1.content[title~="hello"]	.content[title*="hello"]	[title^="hello"]
h1.content[title*="hello"]	.content[title^="hello"]	[title$="hello"]
h1.content[title^="hello"]	.content[title$="hello"]	[title\|="hello"]
h1.content[title$="hello"]	.content[title\|="hello"]
h1.content[title\|="hello"]
h1[title]
h1[title="hello"]
h1[title~="hello"]
h1[title*="hello"]
h1[title^="hello"]
h1[title$="hello"]
h1[title\|="hello"]