> a parser may reject the document entirely if it occurs Ah, that's what I was missing. Thanks! The relevant part of the spec: > user agents, while parsing an

> a parser may reject the document entirely if it occurs Ah, that's what I was missing. Thanks! The relevant part of the spec: > user agents, while parsing an HTML document, may abort the parser at the first parse error that they encounter for which they do not wish to apply the rules described in this specification. (https://html.spec.whatwg.org/multipage/parsing.html#parse-errors https://html.spec.whatwg.org/multipage/parsing.html#parse-er...)