javascript - jQuery : Delete span from title tag

Question

请问我如何获得我尝试使用的标题标签的跨度

console.log($('title > span').text()); 

但它返回一个空结果。例如，我想从这段代码中获取“美丽”这个词:

<title>lorem epsum dolor <span class="spa">beautiful</span></title>

Answer 1

<title>标签内不应包含任何其他标签。

如此处所述https://www.w3.org/TR/html401/struct/global.html#h-7.4.2

Titles may contain character entities (for accented characters, special characters, etc.), but may not contain other markup (including comments).