Re:Building a new Windows 3.1 app in 2019: A Slack Client
by shakna on Thursday December 19, 2019 @09:08AM
(#21834976)
XHTML came after HTML 4.0, so it had its advent around the rise of JavaScript's popularity.
However, HTML 2.0, which you can find specified here [0], and it specifies the "ignore" behaviour. Short of spinning up an old VM, I think I'll trust that my memory hasn't failed me.
From RFC 1866:
> markup in the form of a start-tag or end-tag, whose generic identifier is not declared is mapped to nothing during tokenization. Undeclared attributes are treated similarly...
> For example:
> <div class=chapter><h1>foo</h1><p>...</div>
> => <H1>,"foo",</H1>,<P>,"..."
However, HTML 2.0, which you can find specified here [0], and it specifies the "ignore" behaviour. Short of spinning up an old VM, I think I'll trust that my memory hasn't failed me.
From RFC 1866:
> markup in the form of a start-tag or end-tag, whose generic identifier is not declared is mapped to nothing during tokenization. Undeclared attributes are treated similarly...
> For example: > <div class=chapter><h1>foo</h1><p>...</div> > => <H1>,"foo",</H1>,<P>,"..."
[0] https://www.w3.org/MarkUp/html-spec/