HackerReposA FIELD GUIDE TO OPEN SOURCE
ProSponsor the shelf♧ 0
← Back to top all-time
Fyrd
caniuse
JSON2012–2026
Fyrd / caniuse

caniuse

Raw browser/feature support data from caniuse.com

21Distinct people
21Mentions
0Explicit recommenders
5.9KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Raw browser/feature support data from caniuse.com

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year21 dated mentions

Observed mentions: 2012-10-03 16:46:29 UTC to 2026-05-24 22:58:32 UTC.

01232012-01-01 00:00:00 UTC to 2013-01-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 comments20122013-01-01 00:00:00 UTC to 2014-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2014-01-01 00:00:00 UTC to 2015-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments20192020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments2023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 2 mentions; 1 submissions, 1 comments2025-01-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2026-01-01 00:00:00 UTC to 2027-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments. Incomplete calendar period.2026*

* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20122012-01-01 00:00:00 UTC2013-01-01 00:00:00 UTC110
20132013-01-01 00:00:00 UTC2014-01-01 00:00:00 UTC000
20142014-01-01 00:00:00 UTC2015-01-01 00:00:00 UTC000
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC101
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC101
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC000
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC202
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC101
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC202
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC303
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC303
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC202
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC211
20252025-01-01 00:00:00 UTC2026-01-01 00:00:00 UTC202
2026 (partial)2026-01-01 00:00:00 UTC2027-01-01 00:00:00 UTC101

What Hacker News says

21 sources
Curiously, Can I Use says: > All major browser engines are working on implementing this spec. However their official positions are absent: https://github.com/mozilla/standards-positions/issues/1167 https://github.com/WebKit/standards-positions/issues/453 And Firefox’s bug for implementing it has no activity: https://bugzilla.mozilla.org/show_bug.cgi?id=1981485 And Can I Use’s underlying data doesn’t have this note: https://github.com/Fyrd/caniuse/blob/fedfb067aceccb2a5edadcc... So it’s unclear why the Can I Use website is saying that everybody is working on it.
In CSS now has an if() conditional function
> The only real problem is that you can’t feature-detect share_target support I didn't know this existed, so the first thing I did is check the caniuse website, and yeah not even they have info about the Web Share Target API[1][2]. As of writing this comment, they only have info about the Web Share API[3]. [1]: https://github.com/Fyrd/caniuse/issues/4670 [2]: https://github.com/Fyrd/caniuse/issues/4906 [3]: https://caniuse.com/web-share
In What about using rel="share-url" to expose sharing intents?
> a lot of the data on the site actually comes from MDN Eh... not really. The feature support matrix (as linked on CanIUse) comes from MDN's browser-compat-data repo. Here's the HTML element's source data: https://github.com/mdn/browser-compat-data/blob/main/html/el... This doesn't contain the testing and usage info that CanIUse cites for support, though, just which browser versions included which features. CanIUse also points to their own repo, which contains a lot of data: https://github.com/fyrd/caniuse But I can't find an easy entry point to find where they're getting the numbers for a specific element. The data on there seems to be primarily for features. So the more precise question is, where is CanIUse getting HTML element testing and usage numbers from? Because that seems to be the issue.
In Why isn't the element 100% supported on caniuse.com?
Oh, I missed EXT-X-PRELOAD-HINT, [1] thanks. That seems like a significant improvement, in that the client can do a hanging GET and have the server respond when the media segment exists, avoiding that transit latency. Still has to send extra requests. (I guess the silver lining there is that this is a flow control mechanism, so the server won't keep sending more data if the client isn't keeping up with previous data. My custom WebSocket protocol doesn't really do flow control right now, beyond what TCP does.) [edit: another problem: multiple simultaneous hanging GETS are really awkward with HTTP/1.1 due to connection limits. You have to shard the domain name (which causes problems with cookie auth). Or you really need to use HTTP/2 or HTTP/3.] I'm really confused by the HTTP/2 push thing that article mentioned. My general understanding of
Read the rest
HTTP/2 push is that the clients implement it by adding the pushed data to their cache and nothing more. (Or don't implement it at all. IIRC Chrome dropped support.) If the client later needs that URL, it loads more quickly. But there's no JS API for doing something as soon as a push is received. Maybe Safari has a special hook in their HLS implementation that bypasses the polling delay if the media segment is pushed, but if so, I don't know where that's documented, and it's a surprising behavior. Or maybe they gave up on the idea? Dunno. The whole HLS spec seems arcane compared to a protocol in which the server pushes data over a WebSocket. Even MSE is more complicated than I'd like. I'd rather try WebCodecs, but only Chrome supports it AFAIK. [2] I suppose the cool kids use WebRTC for live video instead, but my use case is an NVR, where I'd like a uniform way of handling playback and live. I don't think WebRTC really does playback. [1] https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc82... [2] https://github.com/Fyrd/caniuse/issues/5641
In Safari Technology Preview Release Notes
https://github.com/hteumeuleu/caniemail This is specifically focused at HTML specs/features, and a fork of https://github.com/Fyrd/caniuse Targeting HTML rendering engines which are email clients. Fortunately (at least for some of the newer features to be included) Links to MDN are available, and caniuse both link to we spec). CSS min for example is working draft. https://www.w3.org/TR/css-values-4/#math-function With 90% desktop/mobile browser general usage support, 50% email usage support.
In Can I Email?
I'm glad to be proven wrong about this! It's not a site I or any of my other heavily database-engineering-focused colleagues were aware of. It seems to be rather new (~2015), which might be why. It seems to just be one fellow's blog, though, addressing only a haphazard collection of topics so far as he feels like writing about them. Whereas CanIUse.com (despite also mostly being the work of a single author) is more designed as a complete reference work, and is a FOSS project open to contribution (https://github.com/fyrd/caniuse). So, not quite the same.
In Waiting for PostgreSQL 14 – SEARCH and CYCLE clauses
It would have helped a lot if JS had a working modules systems on the web. > What hope do those who can’t write JS have? Using a custom element from the directory often needs to be preceded by a ritual of npm flugelhorn, import clownshoes, build quux, all completely unapologetically because “here is my truckload of dependencies, yeah, what”. JS has been in a dark & ugly spot, & WebComponents feeling janky & weird is probably 50% the fact that JS is this dark twisting maze where each project has it's own very unique assumptions about how to turn authored JS into usable, deployable JS. We're still hoping, praying that import-maps eventually give us modular javascript code that we can deploy, without having to push it through a handful of compile/build tools: https://github.com/Fyrd/caniuse/issues/4810 By compare, Big Framework land often ad
Read the rest
opts some suggested normative best paths people can work with (ex, create-react-app bundling build/test/&c tools). Alas, the language itself is still, a decade latter, trying to proceed to useable modules on the web. The other major point of this article tends towards a JS vs HTML problem, another area I am very sympathetic to & have hopes for. > Far more people can write HTML than JS. Even for those who do eventually write JS, it often comes after spending years writing HTML & CSS. [...] If components are designed in a way that requires JS, this excludes thousands of people from using them. There are ongoing efforts with HTML Modules ( https://www.chromestatus.com/feature/4854408103854080 ) to try to make, among other things, bringing in WebComponents much easier, and Declarative Custom Elements ( https://blog.usejournal.com/w3c-declarative-custom-elements-... ) to make building modules much more HTML-centric & declarative versus today where most of the authoring of a custom element has to be done in JS. There are very real problems, there is too much js, the js module system is still in a 1/2 complete state on the web, & these very much dog Web Components. But the future is exciting, & I continue to have hope that a much better, much more web native way of building emerges on the web platform. Lea talks a lot to how scattershot the last decade of work has been, how inconsistent, but given the other ecosystem constraints I'm not fully surprised, & I'm delighted that we are spending so long building & experimenting & learning, that for many of us, the hunger is very real. Also missing, the big adopters of WebComponents have been pretty silent, their thought-leadership seems missing: Youtube, Github. There are visible people from these worlds talking about WebComponents, but to my knowledge the real experience of WebComponents at scale from the very successful adopters remains a story not told.
In The Failed Promise of Web Components

Showing the 15 most recent of 21 sources. Enable JavaScript to search and browse every indexed mention.

MAKE YOURSELF AT HOME

A few shortcuts

/
Search the collection
?
Open this guide
Esc
Close dialogs and navigation

Your saved repositories and interests stay in this browser.