What is the function of base tag in html

What is the role of the base tag in html?

Function: Specifies the default address or default target for all links on the page. It is a label that expresses the path and connection URL.

Note: Normally, the browser will extract the corresponding elements from the URL of the current document to fill in the blanks in the relative URL. This can be changed using thetag. The browser will then no longer use the URL of the current document, but will use the specified base URL to resolve all relative URLs. This includes URLs in,,,

   
  
 
请注意，我们已经为图像规定了一个相对地址。由于我们已经在 head 部分规定了一个基准 URL，浏览器将在如下地址寻找图片：
 
"//m.sbmmt.com/tpl/Index/Static/img/banner7.jpg"
 

 
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请注意，链接会在新窗口中打开，即使链接中没有 target="_blank" 属性。这是因为 base 元素的 target 属性已经被设置为 "_blank" 了。