字幕列表 影片播放 列印英文字幕 XHTML or Extensible HyperText Markup Language is the successor to HTML. It's a reformulation of HTML using XML and is therefore almost identical. However, XHTML is stricter so there are a few differences that we need to look at. First, XHTML requires all elements to be closed. So previous optional end tags must be included and elements that does not have an end tag gets one in the start tag by adding a forward slash. Secondly, XHTML is lowercase-only for all tag and attribute names. And all attributes must have a value specified. For attributes that don't have any values this means that they must use their own names as their value. Also, double quotes are required around all values. It's recommended that we specify an XML namespace using the xmlns attribute. By placing this attribute within the <html> tag we decide the namespace used throughout the document. This attribute can be placed within any element to define one or more alternative namespaces within our document. There is also an optional line that we can place at the first line of the document. This XML directive tells the browser that we are using the current version 1.0 of XML along with the common 8-bit Unicode character set.
B1 中級 HTML教程-17-XHTML (HTML Tutorial - 17 - XHTML) 25 4 Pan-Shy Gang 發佈於 2021 年 01 月 14 日 更多分享 分享 收藏 回報 影片單字