rem的“根元素”是什么？
[英]What is the “root element” for rem?
问题描述
Equal to the computed value of font-size on the root element.
等于根元素上font-size的计算值。 When specified on the font-size property of the root element, the rem units refer to the property's initial value.
What is this "root element" referring to? 这个“根元素”指的是什么？ <html> ? <html> ？ <body> ? <body> ？
2 个解决方案
解决方案1
5 已采纳 2015-09-11 19:27:58
See the HTML specification . 请参阅HTML规范 。
For an HTML document, the root element is <html> . 对于HTML文档，根元素是<html> 。
See also the XML specification : 另请参阅XML规范 ：
There is exactly one element, called the root, or document element, no part of which appears in the content of any other element.] For all other elements, if the start-tag is in the content of another element, the end-tag is in the content of the same element.
解决方案2
-1 2015-09-11 19:36:15
All bodies of web with html standards start with <html> .This is why the root element is html tag. 所有带有html标准的web主体都以<html>开头。这就是为什么根元素是html标签。 Even if you remove html tag from a html file and open it using browser, you can check the code by inspect element feature that browsers added html tags for you. 即使您从html文件中删除html标记并使用浏览器打开它，您也可以通过inspect element功能检查代码，浏览器为您添加了html标记。
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