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LoganDark
Love the ruby tags on Chinese text!!
OuterVale
I use them whenever I have an excuse!
Semaphor
Ohh, conditional comments. We had so many IE holdouts on our site, I think only around 2021 I removed the last IE specific fallbacks, and I think some conditional comments were a thing until 2020.

I’m not sure when I removed a bunch of `msapplication-` fields, but probably after 2021 ;)

I guess I can remove `apple-touch-` and `application-name` stuff next…

icameron
Conditional comments are still part of HTML email templates. Though soon will be dead I hope. Thanks "classic" Outlook!
1-more
When I worked at agencies, it became clear to me that the audience for a company's website was not that company's customers or prospective partners or anything, it was that company's execs, who were often on IE two versions back from what was current. Thank goodness the earliest I ever had to support was 7.
nness
Forever burnt into my mind is PNG alpha work-arounds in IE:

    filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='image.png');
bbx
Ha, fantastic line that one. Transparent pngs caused so much unnecessary trouble in IE6, it was very annoying, and limited our options as graphic designers.
matsemann
Hah, my thought as well, was a part of my standard page setup. And then using those transparent pngs to do rounded borders with 9 images nested within 9 divs!
kijin
9 divs? That sounds pretty modern. I remember tables with 9 cells, with cellspacing=0 cellpadding=0 to remove spaces between those cells.
aduty
I remember both and I'm thankful that we were able to leave it behind.
DonnyV
Using images for rounded corners.....ugh. I forgot all about that.
justsomehnguy
I have some bad news for you: "inspect" the whitespace to the left of any comment here.
intrasight
Lots of mud at the base of the wall. I think it's a good sign. It'll be a bad sign if this list does't grow.

I do bemoan the loss of the <?xml-stylesheet?> processing instruction and the JavaScript XSLTProcessor API.

CM30
Reminds me of how awkward HTML doctypes used to be. Nowadays it's very simple, but in the past? You had to refer to the URL of the doctype declaration on every page

> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

This plus the X-UA-Compatible stuff mentioned in the article meant that for many people, the first few lines of code on a web page were something they probably copied from a tutorial or reference document every time, at least if they didn't have a CMS handy.

TeMPOraL
Like many, I ended up memorizing the pattern at some point, and then typing it from memory.
edoceo
My editor had templates and snippets. Very lux in 2000.
Telemakhos
You only had to include a doctype if you needed to turn on strict XML rendering or do fun things with XSLT. It was great if you wanted to convert, say, TEI to something browsers could read.

You were always, since the days of HTML 1.0, able to use just <html> to open your document without a doctype. It would be in tag-soup mode, but for most documents (rather than applications) that was fine. Not only do you not need a doctype, but you don't even need a <head> statement... browsers will generate one if you leave it out.

zdragnar
Technically yes, but the struggle to keep IE out of quirks mode was real, and that meant a doctype and head and all the things.
Klonoar
I am almost positive that there was one version of IE where having any space or newline before the DocType would trigger quirks mode.
netol
About Twitter Embeds:

> These meta tags (and some other, less frequently used ones) were used on Twitter when generating link embeds. However, the documentation and card validator are no longer accessible (previously at https://dev.twitter.com/cards/getting-started and https://cards-dev.twitter.com/validator respectively). X falls back to the widely respected Open Graph meta tags, making the Twitter-specific declarations largely useless. They should be removed in favour of Open Graph tags. Further, they should be removed because X is an awful site with poor moderation that is owned by a man who publicly performed a Nazi Sieg Heil salute and has directly contributed to the rise of fascism in the United States of America and globally, among other horrors.

Ok but I believe `twitter:card` has no OG equivalent and still works?

tosti
Well, that escalated quickly. If my client wants Twitter tags, I'll write those Twitter tags. If my client wants dancing hamsters, I'll add those dancing hamsters. I don't care who Elon Musk is and what he did. I don't know the guy, but I do know my wife and family and they want food on the table.
Tepix
Luckily, some people have enough money to be able to afford ethical inaction.
matsemann
I was also thinking about charsets, BOM (byte order marks) and other shenanigans that had to be correct in the top of the file for things to display as expected.
skobes
It is still important to declare UTF-8 either in <meta> or Content-Type header, otherwise it will usually default to Windows-1252. Yay compatibility!
tabwidth
Even the meta version is picky about where it goes. The whole declaration has to fit inside the first 1024 bytes. Easy to break with a giant comment at the top.
lapcat
I would add this:

  <meta name="viewport" content="width=device-width, initial-scale=1">
All you need is initial-scale=1, not width=device-width, which is redundant.

"You do not need to set every viewport property. If only a subset of the properties are set, then Safari on iOS infers the other values. For example, if you set the scale to 1.0, Safari assumes the width is device-width in portrait and device-height in landscape orientation." https://developer.apple.com/library/archive/documentation/Ap...

I've confirmed the behavior in testing.

phil-pickering
The latest MDN recommendation is to use only width=device-width, with initial-scale being mostly redundant.

Source: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/...

cxr
How is it bogus? outerHTML is an attribute of Element and DocumentFragment is not an Element

Have you considered that it's just a Gecko quirk that it happens to work in Firefox? Where do the standards say it ought to work?

forgotmypw17
Thank you so much for this amazing resource. One of my projects is a hyper-compatible framework that builds websites that span the compatibility spectrum from Netscape 3.x to today's browsers, and this is very helpful.
OuterVale
Oh, that is so great to hear. Glad to provide it! While writing I was very much thinking about it from the perspective of stripping things out, rather than incorporating legacy code for legacy contexts. Really interesting to think about that line of usage.
forgotmypw17
I still generally avoid browser-specific hacks like these, aiming for lowest-common-denominator most-minimal HTML that still satisfies most browsers. However, now and then there's just no avoiding it.

I am continuously in awe of the Web's decentralized and open nature that allows something like this to happen-- for one reasonably complex file/application to be compatible with 30 years of co-evolving client software written by many different developers and teams, much of it no longer supported.

hefner1456
Dont forget the Sega Dreamcast Planet Web:)
forgotmypw17
Based on what I just looked up, PlanetWeb 1.0-2.0 and 3.0 support HTML 3.2 and HTML 4.0, respectively, so it should work... I have not tested with this browser specifically, and it has no close relatives, but I've tested with enough mainstream and less mainstream browsers from that era to say this pretty confidently.
hefner1456
there are cool some features that let you scroll text or have a custom logo on the vmu and other cool stuff. Here are some links I keep around if your curious.

https://web.archive.org/web/20241003101005/https://www.angel...

https://web.archive.org/web/20031205061600/http://dreamcast....

https://web.archive.org/web/20181029115530/https://dreamcast...

https://www.dreamcast-talk.com/forum/viewtopic.php?t=16378

http://kamui.cool/zz_lab/infinitedream_HTTP_USER_AGENT.html

http://kamui.cool/zz_lab/jeffma_useragent.html

http://kamui.cool/zz_lab/browsermatrix.html

https://dreamcast.wiki/Development

https://dcemulation.org/phpBB/viewtopic.php?t=47902

https://web.archive.org/web/20250713015510/http://pc.psilocy...

https://web.archive.org/web/20000521015744/http://tools.plan...

101008
This was not a HTML snippet by itself, but I remember early 2000s almost every website had three small icons somewhere: Set as homepage, Add to favorites, Contact (an envelope/email icon). I think I never used them (I didn't use Favorites back then, don't know why), but it was nice to see that they were available.
rickcarlino
Server side image maps are a fun one also: https://rickcarlino.com/2021/what-were-server-side-image-map...
BorisMelnik
oh man <map> and <area> yes kids today just don't know the pain we went through.

this is back when every single byte mattered and saving a few MB was the difference between a good user experience and a bad one.

for those that never used this, you would do something like

<img src="funnycats.jpg" usemap="#funnycats-map">

<!-- the map defines clickable zones --> <map name="funnycats-map"> <shape="rect" coords="34,44,270,350" href="cats.html"> </map>

most ppl used something like Dreamweaver but bad-asses would do their own coordinates.

gavinray
My web dev experience began right before ES6, when browsers still did not do parallel asset loads and so spritesheets were common

Why could you not have defined elements overlayed using high z index that were clickable, like invisible divs?

jgraham
Server side image maps predate javascript. They were in early versions of Mosaic.

Client side image maps and the script element were (AFAICT) both introduced in Netscape 2.

Even when scripting was introduced, you didn't necessarily have the ability to move elements around freely on the page. I think (but I'm not certain) that it wasn't until Netscape 4 era that you had enough layout primitives to implement the multi-layer positioning approach to custom clickable areas.

gavinray
With plain HTML you could have done this, though?

  <div class="image-map">
    <img src="funnycats.jpg">
    <a
      href="cats.html"
      style="position:absolute; background: transparent; left: 8.5%; top: 12.5%; width: 59%; height: 87%;"
    ></a>
  </div>
matsemann
But only square hit targets then (until clip paths much later). Image maps supported polygons and circles. And position absolute is still a few years after image maps.
gavinray
Ahh that makes a lot of sense -- thanks!
cxr
[delayed]
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1-more
The only time I ever needed dreamweaver: I found an open source imagemap of the US states and I needed to scale it to match my background image of the US provided by an art director. Dreamweaver let me see all the <area>s easily. Maybe there was another way to do it. Fun fact: the art director wanted states to grow on hover, but acquiesced to having them change color when I pointed out how impossible it would be to click on Rhode Island if you'd hovered Massachusetts first. I don't even know how I would have done the grow effect, tbh.
deanebarker
I thought PICS was a well-designed framework. I was disappointed when it didn't take off.
myfonj
There is similar collection in the joshbuchea/HEAD project, in DEPRECATED.md [0].

(It reminds me to finally gather and record remaining info about

    <meta name="keywords" content="...">
that's missing in both documents…)

[0] https://github.com/joshbuchea/HEAD/blob/master/DEPRECATED.md

OuterVale
Keywords aren't (completely) dead (yet), unfortunately. https://bsky.app/profile/vale.rocks/post/3muylxyhg5222

Mention of usage by Yandex: https://yandex.com/support/webmaster/en/controlling-robot/me...

myfonj
Ha! Last year I did some preliminary research, and all contemporary sources I've found agreed that last public search engine stopped supporting meta keywords around 2018, IIUC. So good catch about Yandex, thanks for the headsup! Funny, how things get complicated :) This meta had very turbulent history in 2010s and refuses to die, apparently.
dchest
Why is meta keywords deprecated? I use them for my custom website search. I don't care that external search engines don't index it.
myfonj
Well from the (incomplete, as turned out) info I gathered it turned out that it was never standardised to begin with (unlike meta description, for example), so it did not even have to be "deprecated". (Like it ever meant something in the real world…) I am definitely for any obsolete mischief, so it brings me joy hearing there is vernacular continuity!

(As for external search engines,FWIR, in its heyday some search engines briefly regarded it quite respectfully, but eventually due to SEO spam they either started to ignore it, or took it as a negative signal, allegedly. But as pointed out in sibling comment, it still survives in Yandex, what is quite surprising plot twist for me.)

dchest
It's recorded in the HTML5 spec under 4.2.5.1 Standard metadata names, which defines the correct format and parsing:

https://html.spec.whatwg.org/multipage/semantics.html#meta-k...

So, it's standardized and not deprecated.

It has this note though:

"Many search engines do not consider such keywords, because this feature has historically been used unreliably and even misleadingly as a way to spam search engine results in a way that is not helpful for users."

HTML 4.01 says the following:

"This specification does not define a set of legal meta data properties. The meaning of a property and the set of legal values for that property should be defined in a reference lexicon called a profile. For example, a profile designed to help search engines index documents might define properties such as "author", "copyright", "keywords", etc."

https://www.w3.org/TR/html4/struct/global.html#h-7.4.4

myfonj
Ha, I stay corrected! Crawling back under rock to re-read WHATWG and historical W3C docs to fill the voids…

Note to self: Apparently, I mentally froze around 2009, so I have some decades to catch on. It seems the breaking point was after 2009 Hixie's WONFIX for adding keywords [0], at a time when both `keywords` and `description` were both swept aside into "MetaExtensions" [1]. The turning point I clearly missed came in 2010 [2] and got resolved through [3].

[0] https://lists.w3.org/Archives/Public/public-html-bugzilla/20... [1] https://web.archive.org/web/20090205191845/http://wiki.whatw... [2] https://lists.w3.org/Archives/Public/public-html/2010Feb/016... [3] https://www.w3.org/Bugs/Public/show_bug.cgi?id=7525

graypegg
Huh, a few of the examples/prose about RSD, pingback, and twitter tags follow the same heading order, and mention the same details with the same links.

Like, it's really no big deal I guess. You were always going to find out this info from sources compiled by other people. But at least don't do the "I'll change some words and call it mine" high school essay plagiarism technique. There was clearly real research done here as well, it's not like it would've been that much harder to write it yourself.

Edit: LLM's used as a context-aware thesaurus called out here... https://vale.rocks/posts/ai-usage#:~:text=Apart%20from%20tho...

    source:
    > X (formerly Twitter) now falls back to Open Graph tags when twitter:* tags are absent, making the dedicated Twitter Card markup redundant for most use cases.

    article:
    > X falls back to the widely respected Open Graph meta tags, making the Twitter-specific declarations largely useless.
---

    source:
    > The Twitter Card Validator was retired and the original Twitter Developers documentation is no longer accessible.

    article:
    > However, the documentation and card validator are no longer accessible (previously at https://dev.twitter.com/cards/getting-started and https://cards-dev.twitter.com/validator respectively).
---

    source:
    > Twitter's Do Not Track support was effectively dropped following the platform's transition to X. The original Twitter privacy options documentation is no longer accessible, and the signal is not honored in practice.

    article:
    > Twitter also had a Do Not Track meta tag for opting out of tracking when using Twitter for Websites widgets. Again, the documentation (previously at https://dev.twitter.com/web/overview/privacy) is now inaccessible, and it seems the tag is no longer respected.
---

    source:
    > XML-RPC pingbacks have been widely disabled by default due to their use in DDoS amplification attacks. Use Webmention instead.

    article:
    > They functioned somewhat similarly to how WebMentions do. Unfortunately, pingbacks rather quickly became an avenue for spam and SEO-gaming, so fell out of fashion. Vulnerabilities allowing sites to be tied up in DDoS attacks also became widely exploited.
jszymborski
I recall adding the page transitions to my website c. 2003ish with FrontPage!

Also, an aside, but it's seldom these days that I see inspirational page design but this page is gorgeous.

derek_foreal
Unfortunately the comments are still used by email developers having to code for Outlook
hk__2
> The Protocol for Web Description Resources (POWDER) succeeded PICS but was also unsuccessful in its intentions

At least they were quite inspired for the naming.

testycool
Love the UX and aesthetic of this site!
samgranieri
Oh this is so much fun. Takes me back to the days I built out a scraper for a daily deal intelligence website.

I literally saw daily deals that were microsoft word files saved as HTML. Ugh.