52132 - After a cerain tag, Mozilla starts displaying all tags

Status: RESOLVED INVALID

(Core :: DOM: HTML Parser, defect, P3)

Description

[Tobias Burnus]

Hi this is with 2000-09-08-21/Linux

Goto the the test case.
It uses <plaintext> which is no longer contained in the W3 recommondation (since
4(?)). Nevertheless this tag shouldn't cause Mozilla to stop to break into tags.

Expected: Mozilla should render as if there weren't a <plaintext> tag.

Comment 1

[Tobias Burnus]

Attachment: Testcase using <plaintext>

Comment 2

[jeffw]

The <plaintext> tag has been deprecated since HTML 2.0. Both Communicator 4.73 
and IE 5.5 render the page the same way as Mozilla. The page works fine if you 
use <pre> instead of <plaintext>.

In short, this is not a bug.

Comment 3

[jeffw]

Attachment: testcase using <pre> instead of <plaintext>

Comment 4

[Tobias Burnus]

The bug is *not* that <plaintext> is ignored (this is actually what I expect).
The bug is that <plaintext> causes every tag after it to show up, e.g. Mozilla
shows "</plaintext>" as "&lt;/plaintext&gt" instead of "". It also displays the
&lt;/body&gt; and &lt;/html&gt;

I would expect that unknown tags (such as <foo> or <plaintext>) getting simply
ignored and won't cause sideeffects.

Comment 5

[jeffw]

That seems to make sense. Nonetheless, Mozilla is rendering the page the same 
way as both Communicator 4.73 and IE 5.5. I don't know enough about the HTML 
specs to have an opinion about whether that's a good thing.

Comment 6

[Hixie (not reading bugmail)]

<plaintext> is doing exactly what it used to be defined as doing. INVALID.

There is no such thing as "</plaintext>". Read the original HTML specs for
details. (Available on the w3 site.)

Comment 7

[Hixie (not reading bugmail)]

heh. turns out there are already 4 duplicates of this bug, all marked INVALID.

# Plaintext
#
# This tag indicates that all following text is to be taken litterally, up to 
# the end of the file. Plain text is designed to be represented in the same way 
# as example XMP text, with fixed width character and significant line breaks. 
# Format: 
#   <PLAINTEXT>
# 
# This tag allows the rest of a file to be read efficiently without parsing. 
# Its presence is an optimisation. There is no closing tag. 
  -- http://www.w3.org/History/19921103-hypertext/hypertext/WWW/MarkUp/Tags.html

Note that PLAINTEXT has been deprecated since about 1994.

Comment 8

[bsharma]

updated qa contact.