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How to use html base tag? How to use the base tag (with examples)

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Release： 2018-08-27 18:44:43
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This article mainly introduces examples of how to use the HTML base tag. In fact, the use of base is quite powerful. People on the Internet say that the base tag is powerful. I have rarely used it in the past and do not understand these. Today I will give Let me introduce this label. Let you use it and see if it feels good. Finally, there is another benefit about the HTML base tag. Next, let’s read the article together

At the beginning of this article, we introduce the usage of HTML:

1. In html< Usage of tag in ;header> tag: 

<header>
<!-- <base> 标签为页面上的所有链接规定默认地址或默认目标。 -->
<base href = "${pageContext.request.contextPath}/" />
<base target = "_blank" />
</header>
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The advantage of using this is that if all links in the page use relative paths, they will be based on the address specified in the base tag. As the base address, the URL of the current document will not be used, such as this: 

<a href = "index.jsp" />
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The relative path used by the tag here is equivalent to ${pageContext.request.contextPath}/index.jsp; and This link will be opened with the target set in the base tag.

It should be noted that if you want to use the href attribute of the base tag, then the path must end with /, otherwise the path will have no effect.

2. How to use the base tag in the a tag:

Since there may be multiple a tags on a page, there are multiple targets. In order to Get out of redundancy. Therefore, the base tag can be used to specify how all a's open jump links.

html How to use the base tag:

Add in the head tag.

The base tag takes effect on all a tags, but when the target of both the base tag and the a tag exists at the same time, the target of the a tag will take effect.

Having said so much, let’s take a look at the example: 

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>base-href实验1：不设置base标签</title>
</head>
<body>
<a href="#">这是一个href属性为空的链接</a>
<br>
<a href="http://www.php.cn">这是一个href属性的绝对路径，前往http://www.php.cn，PHP中文网的链接</a>
<br>
<a href="test.html">这是一个href属性设置为相对路径（test.html）的链接</a>
</body>
</html>
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is displayed in the browser as follows:

How to use html base tag? How to use the base tag (with examples)

HTML tag You can specify a default address and default attributes for all relative URLs on your page. For sites with shallow directories and small structures, is of little use, but for sites with deeply nested directories, the tag may help you concentrate weight on the page and make the URL shorter! Because can help you optimize your site.

About the benefits of html :

How to use html base tag? How to use the base tag (with examples)

##Okay, this is all about the usage of the base tag , if you have any questions, you can ask below.

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