http-equiv="content-language" 不起作用 (element.lang = "")

Question

console.log("lang = " + document.documentElement.lang);

    <html>
    <head>
        <meta http-equiv="content-language" content="es">
    </head>
    <body></body>
    <html>

为什么？

According to specification，如果节点和节点的任何祖先（包括根元素）都没有设置任何属性，但是有 pragma-set 默认语言集，那么是节点的语言.

Answer 1

This feature is non-conforming. Authors are encouraged to use the lang attribute instead.

The Content-Language value for an http-equiv attribute on a meta element should no longer be used.

正如所建议的那样，使用 lang= 是可行的：

console.log("lang = " + document.documentElement.lang);

    <html lang="es">

如果您的目标是设置语言，这是更好的方法。

http-equiv="content-language" doesn't work (element.lang = "")