http://a.deveria.com/caniuse/#agents=All&eras=All&cats=HTML5&statuses=rec,cr,wd,ietf FAQ
Which features do you choose to add to this list?
I use the following criteria:
- Useful to web designers/developers
- Likely to be eventually implemented by the majority of browsers
- Currently implemented by at least one browser
- Currently lacking at least one implementation
Why include Chrome and Safari separately, since they both use Webkit?
Each browser may choose to include different features of webkit in their final versions, so they are not always the same.
What's the point in having the conclusion if it will always be "not ready" with an implementation missing?
The conclusion will change when hiding certain browsers/eras, which is why it's there.
How do you decide which version belongs in which "era"?
The "far past" is based roughly on the oldest version of a browser still in use. See for example YUI's graded browser support chart
The "future" eras are trickier, since it's not always obvious when a browser will be released. But in most cases you can make a pretty good guess.
When is a feature considered "supported"?
When its primary purpose is largely fulfilled. It does not mean it's 100% supported, just that it's usable in most cases
Is there an intentional bias against Internet Explorer?
I will admit that part of my reason to create this page was to highlight how many features could be used already if it weren't for IE holding us back. However, I have tried to keep things as balanced as possible and no intentional bias should exist.
Then why are there more unofficial features by other browsers? Where's IE's filter, CSS behaviors, etc?
As mentioned as a criteria, it needs to be likely for most if not all browsers to support a feature, ideally through standardization. Many IE-specific features were never proposed to the W3C/WhatWG, and other browsers have shown little to no interest in adopting them.
If it turns out that other browser-specific features show little chance of reaching further adoption, I will remove them as well.
How often is this page updated?
I try to keep it as current as possible, with new information being usually being processed within a few days. Follow the feed if you'd like keep up with all the changes made.
Legend
- Supported
- Not supported
- Partially supported
- Support unknown
Notes
- Several features have not yet been fully defined, and thus have only experimental support.
- Internet Explorer 9 information is based on early developer information.
- Firefox 3.6 information is based on the Firefox 3.6 beta, Firefox 3.7 information is based on features planned for Gecko 1.9.3.
- Safari 4.* information is based on the latest Webkit nightly builds.
- Chrome 4.0 information is based on the 4.0 developer preview.
- Opera 10.* information is based on the experimental builds as well as information available for Presto 2.3
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