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Posted by sadiq 3 days ago

An SVG is all you need(jon.recoil.org)
337 points | 145 comments
iamsal 3 days ago|
Even though the article is mostly talking about visualizations, but I thought I'd share that I did at one point build a dance choreography software that renders the UI entirely SVG. I was surprised as to how well that worked.

If you're curious, it's called StageKeep, and you can find it here. https://stagekeep.com/

The original project used React Three Fiber, but refactored it to SVG for reasons I don't quite remember. I was inspired by signed distance functions, and the fact that one function could have such an outsized visual effect. Although the software doesn't use SDFs, but I like the idea of atomic functions that accepts some input, and outputs SVG.

wongarsu 2 days ago||
SVG was once hailed as the Flash-killer. With SVG + CSS + JavaScript you could do anything you could do with Flash, including those fancy Flash websites or complex applications. There just weren't any good authoring tools, while Flash had an amazing one.

Then Flash just died without being replaced by anything

elviejo 2 days ago|||
Steve jobs killed it when said it would work on the iPhone because if the "huge" memory and battery resources. He said Javascript and HTML was everything you needed.

Here is the original memo: https://www.editionmultimedia.fr/wp-content/uploads/2020/12/...

zdragnar 2 days ago||||
Part of the problem was that browsers never really fully optimized svg, especially with CSS. Animated stroke patterns were especially rough, if my memory serves.
mapt 2 days ago||||
Certain businesses paid for years to keep a private-label version of Flash alive for their internal Flash business applications.
chiefalchemist 2 days ago|||
Thank gawd. Flash, gawd bless it, was a low point in internet history. People simply couldn’t resist misusing it and abusing it. I’m not blaming the tool per se. But Flash’s addictiveness caused reasonable people to make gawd-awful UI and UX decisions. Crushing Flash is probably Jobs’ most underrated accomplishment.
Jensson 2 days ago|||
It ended an era of easy to make web games though.
danaris 2 days ago|||
Honestly, I blame Adobe most for the death of Flash.

If they had been willing to invest the resources needed to make it both performant and, most importantly, secure, there's a much better chance that it would have survived—it might even have been enough for Jobs to be willing to have it work on the iPhone. (Maybe.)

Too many people lamenting how the death of Flash ended a thriving ecosystem of games and other art forms forget that Flash was also a huge resource hog, one of the #1 sources of crashes on many systems, and an absolutely massive vector for malware. I'd love to see some statistics on just how many infections were enabled by Flash, and how fast that declined once it stopped being a requirement to browse large chunks of the web.

And don't forget, either, that Flash wasn't originally an Adobe product: they took it over when they bought Macromedia, eliminating their biggest competitor and guaranteeing their monopoly. I wasn't really paying that much attention to the space, but it wouldn't surprise me if under Macromedia, it was getting better and more frequent updates.

bikelang 2 days ago|||
Minor nit but I noticed at the bottom the text reads “Start free tiral”. Maybe a dance-themed joke that went over my head? But probably intended to be “trial” :^)
jfengel 3 days ago|||
Wow, that is really cool. As a stage director I touch on choreography a bit. It would be really cool to pre-plan blocking with something like that.
Animats 2 days ago||
That's good for blocking. Then, for movement, what? Probably not Labanotation.
great_tankard 2 days ago|||
Very cool. Are you a dancer yourself?
iamsal 2 days ago||
Heh, thanks.

I wish I was a dancer.

That said, the founder who hired me to work on this is a dancer.

He hired me because he liked the fact that during the interview, when asked "what do you know about dance", I responded "I used to crip walk when I was in high school", so I was the top choice just for that, haha.

Edit: the Founder is Axel Villamil, and he's super charismatic. Y'all are going to love him. Here's him trying to raise an investment round https://www.instagram.com/reel/CyhL5kitUbD/

petercooper 2 days ago||
That is the best reason I've ever heard a developer win an interview with.
aa-jv 2 days ago||
This is a brilliant piece of software and I've had a blast learning about it.

I would LOVE to see this feature: pass it a video, get a formulated choreography based on that video. For example, take a Project21 or Avantgardey video, do some AI/ML voodoo, import their choreography.

Think that'd be possible?

codedokode 2 days ago||
Downsides of using SVG:

- cannot wrap text

- cannot embed font glyphs - your SVG might be unreadable if the user doesn't have the font installed. You can convert letters to curves, but then you won't be able to select and edit text. It's such an obvious problem, yet nobody thought of it, how? Photoshop solved this long time ago - it saves both text and its rendering, so the text can always be rendered.

- browsers do not publish, which version and features they support

- may contain Javascript and references to external resources, which makes it difficult to view in a secure, isolated environment

One of solutions is having two SVGs: author version, which you edit in Inkscape and which uses Inkscape-specific extensions, and published version, which is generated from the first, that uses only basic features and has text converted to curves.

geokon 2 days ago||
plenty of other problems

- They often render differently in different browsers and other renderers. It's very frustrating to get consistent results (like a PDF). In complex diagrams I'd say it's basically impossible

- Renderers that are fast usually lack many features

- Nobody other than the browser seems to actually have all the features?

- You can link an SVG within an SVG (to make a lightweight composite image). But if you have two levels of indirection then all renderers I've tried will refuse to render the SVG

- Inkscape is basically the only good editor on Linux and it easily runs out of memory and crashes for complex images

- Complex SVGs eat all your RAM in Chromium (only marginally better in Firefox)

- Basic things like arrows from Inkscape will not render anywhere else

I still use SVGs all the time, b/c there are no good alternatives, but it's a crappy standard and I try to keep all my images/diagrams extremely simple

danaris 2 days ago|||
> and has text converted to curves.

But this then loses the ability to select it as text—which, at least in Safari, is present with an SVG <text> element.

So either way you don't get full functionality.

bobbylarrybobby 2 days ago||
Safari supports base64-embedding font files in a <style>’s @font-face {} (iirc it's something like `@font-face { src: url('data:application/x-font-woff;charset=utf-8;base64,...'); }`) that can then be referenced as normal throughout the SVG. I don't recommend this though, nobody wants to deal with 500KB SVGs.
codedokode 2 days ago|||
The idea was that you can embed only the glyphs used in a text. For example, instead of embedding thousands of existing Chinese characters, embed only 20 of them. Embedding is necessary anyway because otherwise you cannot guarantee that your image will be displayed correctly on the other machine.

Also, allowing CSS inside SVG is not a great idea because the SVG renderer needs to include full CSS parser, and for example, will Inkscape work correctly when there is embedded CSS with base64 fonts? Not sure.

m-a-t-t-i 2 days ago|||
You can also point to font files with @font-face. I use a small custom font that's only 16 KB. Although, when opening the file locally, you have to first disable local file restrictions in safari's settings before it works...

  <defs>
  <style type="text/css">
  @font-face {
  font-family: 'A-font';
  src: url('A-font.woff') format('woff');
  font-weight: normal;
  font-style: normal; }
  </style>
  </defs>
codedokode 2 days ago|||
So if you save the SVG image, it won't display without Internet connection. Not great.
cubefox 2 days ago|||
I don't think that helps with embedding fonts.
some_guy_nobel 3 days ago||
I agree with the author when they write:

""" In my idealistic vision of how scientific publishing should work, each paper would be accompanied by a fully interactive environment where the reader could explore the data, rerun the experiments, tweak the parameters, and see how the results changed. """

I do like seeing larger labs/companies releasing research full of SVGs. In recent memory, I quite liked this from NVIDIA:

https://research.nvidia.com/labs/dbr/blog/illustrated-evo2/

gaha 2 days ago||
This really reminds me of a new paper [1] from my colleagues. All figures in the paper link to a website, where the figures can be reproduced and dynamically changed in the browser from the source data. It's really cool, it is a static website that runs DuckDB, WebR, and ggplot. Here [2] is an example for the first figure.

[1] Paper: https://www.cs.cit.tum.de/fileadmin/w00cfj/dis/papers/clouds...

[2] Figure 1: https://tum-dis.github.io/cloudspecs/?state=N4IgzgjgNgigrgUw...

_heimdall 2 days ago|||
The idea of rerunning experiments only seems feasible when the entire experiment was based on modelling, presumably modelling that can easily/quickly be rerun in a browser environment.

The idea of being able to view and parse the dataset in different ways is interesting though, effectively allowing readers to interpret the experiment's resulting dataset from different angles than the author published.

mmooss 2 days ago|||
Without the OP's proposed use of SVG, what format would someone use? PDFs won't handle it well - unless PDF's interactivity capabilities are much better than I think. We never developed a client-side multimedia file format; all we have are text formats like Word and PDF, which embed images decently, and embed multimedia and interactivity (beyond form filling) in awkwardly and in a limited manner.
steezeburger 2 days ago||
What's wrong with SVG? Notebooks have their issues but are kinda this conceptually. I guess FLAs and Flash too. But you say we never developed a "client-side multimedia file format". Is that not exactly what html + js are for?
mmooss 2 days ago||
I mean the equivalent of a Word document: a file I can reasonably edit, including editing the multimedia and interactive/dynamic content, save, email, put on a thumb drive or Dropbox, etc.
Agraillo 2 days ago|||
I'd say that html+js suggestion of GP still holds, but with caveats. After all these years, HTML has everything needed for this, including images that can be embedded via the data URI scheme [1].

For example, I once adjusted an Object Pascal interactive program (target: Windows/Win32) for the browser target (FreePascal compiler has the JS target). An intermediate result was a bunch of files that worked locally on desktop but struggled on mobile. With a little help from the SingleFile extension [2], I ended up with a single HTML file containing all functionality and content. It worked great, for example, in MiXplorer's internal HTML viewer. I can't recall the exact details, but the file:/// protocol still had issues in Chrome, Firefox, or both. Anyway, preparing a local address correctly with a keyboard is a challenge so let's just assume that having capable file managers running local html files is enough

Sure, to make this manageable, you need good tools that handle all sides of the task. But at least in theory, the format is fully capable. My only global issue was that the state for locally run HTML files is a kind of ephemeral entity, but for interactive multimedia files, you may consider this obstacle small.

[1] https://en.wikipedia.org/wiki/Data_URI_scheme

[2] https://github.com/gildas-lormeau/SingleFile

cl3misch 2 days ago|||
I think HTML is exactly the "client-side multimedia file format" you want. I guess what we don't have is an established editor UI. You have to create it yourself.

It's if we had the .docx format but MS Word was read-only. You would have to create the XML and zip it yourself, to be then rendered by Word. That's effectively how I see HTML+js in browsers.

zipy124 2 days ago|||
Even just allowing GIFs or videos to be embedded would be a value add.
fooker 3 days ago||
Interactive and SVGs don't really mix, although intuitively it would seem that they do. Rendering remotely complex SVGs tale multiple seconds, while any kind of interactivity demands ~30+ frames per seconds.

Without interactivity, postscript is vector graphics too.

dekhn 2 days ago|||
How complex are you talking about? I've done animations with hundreds of elements and it's fine.
Grimblewald 2 days ago|||
I'd be curious to know what classes as complex for you, since ive done some frankly crazy stuff with svg's, which outperformed any raster implementation. Ultimately, poor performance was always my fault, especially initially when i was still treating it with paradigms better suited to the world of raster graphics.
tylervigen 2 days ago||
Two years ago I re-vamped my "Spurious Correlations" side project, which is mostly just a bunch of charts. However, I couldn't find a charting software I liked that would display clean, simple visuals with the constraints I wanted. (I had used pCharts and HighCharts in the past, but didn't like charting in Javascript or PHP.)

I decided to "roll my own" and write Python scripts that outputted SVG markup. I was worried this would go about as well as every other "roll your own" project does, but was pleasantly surprised. It is surprisingly easy to output reliable, good-looking SVG graphics using Python. If you are making a chart, everything is just math.

The infinite scalability is almost just a happy upside to the simplicity of creating the visualizations, which is annoying in raster format. It made me like SVG even more.

crabmusket 2 days ago||
If anyone is looking for a clean JS charting framework, I highly recommend Observable Plot.

It's from the creator of D3 and it's much easier than using raw D3. I've been using it outside the Observable platform for debug charts and notebooks, and I find its output crisp and its API very usable.

It doesn't try to have all the bells and whistles, and I'm not even sure if it has animations. But for the kind of charts you see in papers and notebooks I think it covers a lot.

eru 2 days ago|||
It's a bit sad that Postscript never caught on as much as it could have. In an alternate timeline, it could have been the HTML (and SVG) we got in ours.
shakna 2 days ago||
Postscript is still everywhere. Its just out of sight, being used as a compile target.

PDF may have "officially" replaced it, but it is still embedded almost everywhere you look.

eru 2 days ago||
PDF is a sad replacement for PS. As far as I can tell, it was an attempt to obscure PS, because alternative vendors were getting better as Postscript than the originators.

(There was some justification in terms of 'Oh, a binary format like PDF is more space efficient.' But PDF never really was more efficient than compressed PS.)

It's not that PS has vanished, but PS isn't nearly as 'everywhere' as HTML came to be.

f30e3dfed1c9 2 days ago|||
From the perspective of someone who worked in printing and publishing starting in the 1980s, there's more to it than that. PostScript was and is terrific as a page description language and as a printer control language. It absolutely revolutionized the printing business. For the first time, you could get complete pages (as opposed to unpaginated galleys) out of high-end imagesetters.

But it was not all that good as a way to send documents to be printed elsewhere. Postscript files were in some ways too dependent on the printer they targeted, so the person creating the PS file had to know too much about the printer that would be used to print it: its resolution and optimal halftone screen frequencies, media sizes, etc. With high-resolution output on photographic film costing around $10 per foot, mistakes could be expensive as well as time-wasting.

Fonts could also be a problem. Ideally, the PS file would contain all the fonts it required but this did not fit very well with the terms of most font licenses. And some applications would include a copy of every font used once on each page on which it was used. This was in line with Adobe's recommended Document Structuring Conventions and had the advantage of making pages within the file independent of one another, but for documents with hundreds of pages, this could add up fast and make the PS file literally hundreds of times larger than if all the fonts were included just once. With small storage media and slow network links, this was a real problem.

The "P" in PDF is for portable, and these are the problems it solved. Unlike a PS file, a PDF file is not targeted for a specific printer model, and most font licenses allowed the licensee to include subsetted fonts in PDF files. I personally prepared PS files for a few thousand books to be printed at various places around the US and later, PDF files for thousands more. There is no comparison: PDF was and is better in every way for this purpose.

eru 2 days ago||
I agree that postscript was far from perfect.

However we can imagine a world where some relatively minor evolutions in PS would have moved it into the right trajectory.

(Thanks for all the historic details!)

tambourine_man 2 days ago|||
PDF is also a lot less powerful, purposefully so. You can start an infinite loop just by double-clicking a PS file, for instance.

It is extremely useful to have a full programing language as a file format, though.

I miss macOS’s Preview.app auto-converting PS to PDF when double-clicked. It was a way to easily distribute a document that could randomize question orders each time it opened, print multiple bingo cards from a single file, etc.

The stack-based and reverse Polish notation thing was also fun.

eru 2 days ago||
You could have made a deliberately restricted subset of PS without going all binary.

Btw, doesn't PDF include Javascript these days? So you can still randomise stuff at view-time in a PDF. See https://th0mas.nl/2025/01/12/tetris-in-a-pdf/

immibis 2 days ago|||
> I was worried this would go about as well as every other "roll your own" project does

We as an industry need to get rid of this fear of creating stuff.

leephillips 2 days ago||
Thanks for making that website. I used examples from it in the first day of my statistics course ("by the end of this course you won't make these kinds of mistakes").
tylervigen 2 days ago||
Glad to hear it! The use in stats courses is the main reason I keep it alive.
ludwigschubert 3 days ago||
The first Distill publication[0] made tasteful use of minimal interactivity through JavaScript/d3.js[1] on top of SVGs. Many of the illustrations were initially drawn in GUI editors.

(Outstanding work by Shan Carter; it’s what I first saw of his style and it’s what made me want to join his team.)

[0] https://distill.pub/2016/augmented-rnns/ [1] https://github.com/distillpub/post--augmented-rnns/blob/mast...

nanolith 3 days ago||
Around 15 years ago, I built a barbecue controller. This controller had four temperature probes that could be used to check the temperature of the inner cooking chamber as well as various cuts of meat. It controlled servos that opened and closed vents and had a custom derived PID algorithm that could infer the delayed effects of oxygen to charcoal.

Anyway, of relevance to this thread is that the controller connected to the local wireless network and provided an embedded HTTP server with an SVG based web UI that would graph temperatures and provided actual knobs and dials so that the controller could be tweaked. SVG in the browser works nicely with Javascript.

tambourine_man 2 days ago|
This sounds awesome. Did you ever filmed it working?
imp0cat 2 days ago||
Exactly my thoughts! Where is the youtube video? :D I really want to see it. :)
jonludlam 3 days ago||
Author here: I've just made a ninja edit of the post as it didn't really make clear a quite important point - the SVG is literally 20 years old, and still works, astonishingly. I'm not sure much else I wrote around the time would still work without some editing!
ianbooker 3 days ago|
The reverse is kind of true: In the beginning, SVGs were not really an option since it lacked adoption across all major browsers, or more specifically its integration was very heterogenous.

So a SVG you authored 20 years ago for some browser will likely work everywhere today.

VladVladikoff 2 days ago||
Except in an email. Because email is pain.
_ache_ 3 days ago||
I really like SVG, I did a lot of things with it and some interesting ones. The only blame I have is that it is sometime slow.

Like for QR Code, precise maps or +100 pixels wide squares. More than 100 "DOM" elements and it will take multiple seconds to show.

The animations also are slow too, compared to canvas, plain CSS or Lottie but nothing very cursed, it's mostly fine.

newcup 3 days ago||
I embedded a chess engine in SVG image of a chess board (https://github.com/jnykopp/svg-embedded-chess) so that the engine moved the pieces automatically and played against itself, just by viewing the SVG.

This was done for a friend of mine who made an art installation that projected like some 50x20 (can’t remember exactly) of these images in a grid on a wall, for perpetual chess madness.

The number of chess SVGs a laptop’s browser was able to run simultaneously did feel suprisingly low, but luckily it was enough for that particular piece of art.

albert_e 2 days ago||
interesting -- is there any video of the art installation
newcup 2 days ago||
Sadly, seems there is not. But the artist has still the web page up he used for the installation: https://heikkihumberg.com/chess/

He said he used ipads as renderers. And even one grid may have looked different back in the day than that page now, as the font might be different. The SVG just uses system fonts and the chess pieces are just unicode characters.

albert_e 2 days ago||
Cool thanks.

Is there a way to control the speed. When I load a single SVG into browser, it runs through the whole game in a flash. (Edge shows animation; chrome and firefox show static image for me)

newcup 2 days ago||
There are three timeouts defined in the SVG / embedded javascript code, on lines 66-68 (https://github.com/jnykopp/svg-embedded-chess/blob/a24249729...)

You can increase COMP_MOVE_TIMEOUT (which is now 1 millisecond) to, say, 100 milliseconds.

RESET TIMEOUT defines how long the game is paused after game is finished to let the viewer to see the result, and NEW_GAME_START_TIMEOUT defines how long to wait before doing the first move when a new game is started.

The static image may be because of some browser security mechanisms; served as raw from GitHub the SVG is not animated for me either on Firefox, but when I download the SVG and view it from local drive in Firefox, it works. (It did work when served from GitHub at some point in history, though.)

danaris 2 days ago||
Yeah; I've built a map viewer in SVG+JS for my small browser game, and it works quite well for that purpose, but when I tried to repurpose the underlying code for a different game, with a much higher object density, it became quite unmanageably slow. (I rebuilt the map for that game using canvas, but it does lose me some functionality.)
WillAdams 3 days ago||
Ages ago, when doing the instructions for the opensource CNC Shapeoko v2 it became necessary (after the project was featured w/ a full page in _Popular Mechanics_ magazine to cater to users who could not visualize as well as the early adopters were able to, so the diagrams were made interactive:

https://github.com/shapeoko/Docs/blob/gh-pages/content/tPict...

Used to be if that was opened in a web browser one could click on the parts list to show/hide or highlight/unhighlight the matching items in the diagram.

Done using Inkscape if memory serves.

sedatk 3 days ago|
That looks cool!
orliesaurus 3 days ago|
My day job involves building dashboards, and SVGs have been invaluable for crisp icons and graphs... the portability across sizes is a blessing, but some of the more exotic filter effects still fail in certain browsers.

ALSO I've run into security reviews that flag inline SVGs because they can embed scripts... would love to see more tooling to lint and sanitize them before deployment.

BUT seeing a two-decade-old vector still render correctly gives me confidence that the core spec is solid.

lucgommans 3 days ago||
> would love to see more tooling to lint and sanitize them before deployment

Sanitisation is one of two possible defences, the other being script execution controls or sandboxing. E.g., if you serve vector images on a web server, set a Content Security Policy header¹ for all your images that simply denies all scripting. You can also run it from a dummy domain ('origin') with nothing valuable on it (like how domains such as googleusercontent.com and githubusercontent.com are being used)

For sanitisation, DOMPurify² is the only widely used and tested library that I know of. It could use more bindings for other languages but, if you can call into it, it can go in your deployment pipeline. (Disclosure: I've worked with some of the people at Cure53, but not on this project)

You can also combine the approaches for defence in depth

¹ https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/CSP

² https://github.com/cure53/DOMPurify

e12e 3 days ago|||
> would love to see more tooling to lint and sanitize them before deployment

Did you see?:

https://github.com/cloudflare/svg-hush

greazy 3 days ago||
what dashboard software do you recommend?
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