Is it actually valid? W3C's HTML validator complains about invalid nesting. It might work because the HTML5 parsing algorithm produces well-defined results for

Is it actually valid? W3C's HTML validator complains about invalid nesting. It might work because the HTML5 parsing algorithm produces well-defined results for broken HTML, but I'm not sure that's the same as "perfectly valid" – the spec calls such markup "misnested" and "erroneous" [0]. [0] https://html.spec.whatwg.org/#an-introduction-to-error-handling-and-strange-cases-in-the-parser https://html.spec.whatwg.org/#an-introduction-to-error-handl...