如何使用 JavaScript 获取 HTML 中的 lang属性?
lang
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
Just.
document.getElementsByTagName('html')[0].getAttribute('lang');
And with the namespace
document.getElementsByTagName('html')[0].getAttribute('xml:lang');
If both attributes agree on their values (as they should), it's enough to read either of them. I'd suggest using
document.documentElement.lang