The label is the baseline URL tag in the HTML language and is a single label.
The label is located within the .lt;head?gt; label of the page header file, and a page can use up to one base element to provide a specified default target.
HTML <base> tags
May 04, 2021 HTML Reference Manual
Table of contents
3. Label definition and instructions for use
5. The difference between HTML 4.01 and HTML5
HTML tags
Specify the default URL and default destination for all links on the page:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool(w3cschool.cn)</title>
<base href="https://www.w3cschool.cn/statics/images/"; target="_blank">
</head>
<body>
<p><img src="logo.png" > - 注意这里我们设置了图片的相对地址。能正常显示是因为我们在 head 部分设置了 base 标签，该标签指定了页面上所有链接的默认 URL，所以该图片的访问地址为 "https://www.w3cschool.cn/statics/images/logo.png";
<p><a href="https://www.w3cschool.cn/">w3cschool.cn</a>- 注意这个链接会在新窗口打开，即便它没有 target="_blank" 属性。因为在 base 标签里我们已经设置了 target 属性的值为 "_blank"。</p>
</body>
</html>
Try it out . . .
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool(w3cschool.cn)</title>
<base href="https://www.w3cschool.cn/statics/images/"; target="_blank">
</head>
<body>
<p><img src="logo.png" > - 注意这里我们设置了图片的相对地址。能正常显示是因为我们在 head 部分设置了 base 标签，该标签指定了页面上所有链接的默认 URL，所以该图片的访问地址为 "https://www.w3cschool.cn/statics/images/logo.png";
<p><a href="https://www.w3cschool.cn/">w3cschool.cn</a>- 注意这个链接会在新窗口打开，即便它没有 target="_blank" 属性。因为在 base 标签里我们已经设置了 target 属性的值为 "_blank"。</p>
</body>
</html>
Browser support
All major browsers support the label.
Label definition and instructions for use
The label specifies the default URL or default destination for all relative links on the page.
You can use up to one element in a document. T he label must be inside the element.
Tips and comments
Tip: Please put the label in the position of the first element in the element so that the information in the element can be used by the other elements in the head area.
Note: If you are using the label, you must have the href property or the target property or both properties.
The difference between HTML 4.01 and HTML5
No.
The difference between HTML and XHTML
In HTML, the label does not have an end label.
In XHTML, the label must be turned off correctly.
Property
| Property | Value | Describe |
|---|---|---|
| Href | Url | Specifies the baseline URL for all relative links on the page. |
| target |
_blank
_parent _self _top framename |
Specify where all hyperlinks and forms in the page open. The property is overwritten by the target property in each link. |
Global properties
The label supports the global properties of HTML.
The event property
The label does not support any event properties.
Related articles
HTML DOM Reference Manual: Base Object