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caniuse.com

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New caniuse site features including regional data now available for preview! See blog post for details: http://a.deveria.com/2013/preview-the-new-caniuse-com-features/
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caniuse.com

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Thanks to more excellent GitHub submissions the following three features were added:

- Strict Transport Security provides a way to declare that a website is only accessible over a secure connection.
http://caniuse.com/#feat=stricttransportsecurity

- The CSS outline property provides a way to set a border on an element without affecting its size/layout.
http://caniuse.com/#feat=outline

- The download attribute makes it easy to turn any link into a download link, without any additional server-side work.
http://caniuse.com/#feat=download
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caniuse.com

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Over the past year or so, I have received a number of requests from people interested in helping to contribute to the feature support data on the website. Until now I didn't really have a organized way to do this, and was only accepting the occasional correction through emails and the feature feedback forms.

Now, contributions are possible through pull requests on the feature data at GitHub. This should allow you to either suggest changes to current features or even to include new features altogether. See this document for details if you are interested:
https://github.com/Fyrd/caniuse/blob/master/Contributing.md

Note that my own updates to the site will of course continue, and the feedback forms (found under each feature table) are still good alternative methods for providing corrections/updates that I may have missed. Let me also take this moment to thank everyone who's done so so far, it's very much appreciated!

So thanks in advance to anyone interested in contributing to the site, I hope this new method will help keep the site of maximum usefulness to the web developer community.
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caniuse.com

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Another feature has been added to the site:

Viewport-relative units. http://caniuse.com/#feat=viewport-units

These units represent 1/100th of the current viewport width (vw), height (vh) or the smallest of the two (vmin). Currently support is limited to the latest IE and desktop WebKit browsers.
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caniuse.com

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By popular demand I have added the Android versions of Firefox and Chrome to the site.

Note that the browsers are currently hidden by default (together with Opera Mobile), and can be displayed by either enabling them in the Options panel, clicking the "Show all versions" link on a given table or directly from this link:
http://caniuse.com/#agents=All

The reason for this is that at this point these browsers all have very little market share, and should be of low priority to the average developer that already has many other browsers to test for. But as these are high quality browsers with a lot of feature support, I felt it to be important that the information is available.

In the near future this selection will be stored in localStorage so each time you visit the site the last selected browsers will reappear.

One final note is that since apps tend to be updated regularly and testing older versions of Android apps is near impossible, only the latest version will appear on the site for these browsers.
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caniuse.com

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Over time, a number of people have sent me bugs they know of that relate to certain features, though they didn't really have a place to go on the site.

This has now changed after adding "Known issues" together with a tab interface for each feature for better organization of notes, issues, resources and the feedback form.

Currently not that many features have known issues, so feel free to use a feature table's feedback form if you know of any browser bugs not yet mentioned. Thanks!
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caniuse.com

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Thanks to more user contributions, the following three features were added to the site:

- The Shadow DOM allows the creation of widgets that use a DOM separate from the host's document DOM http://caniuse.com/#feat=shadowdom

- The WebP image format that supports both lossy and lossless images at smaller sizes than jpeg or png. http://caniuse.com/#feat=webp

- Intrinsic width & height CSS values like min-content allow more types of layout sized based on content rather than specific measurements. http://caniuse.com/#feat=intrinsic-width

Thanks again to everyone who helped contribute this data!
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caniuse.com

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The first two features submitted by GitHub contributors were added (actually several weeks ago) to Can I Use, these are:

- Content Security Policy: A method of defining what resources can be loaded from other domains and which cannot.
http://caniuse.com/#feat=contentsecuritypolicy

- PageVisibility: An API providing events and information relating to the
visibility of the page to the user.
http://caniuse.com/#feat=pagevisibility

Also added:
- SVG fragment identifiers: By setting a fragment on an SVG URL, it's possible to specify the part of the SVG image that appears (useful for sprites).
http://caniuse.com/#feat=svg-fragment
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Another mobile web browser has been added to the site, this time it's two versions of the BlackBerry browser. Both the current OS 7.x browser and the upcoming OS 10 browser should now appear in all feature tables.
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caniuse.com

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As requested, the following two features were added:

http://caniuse.com/#feat=word-break
The CSS3 word-break property allows words to be broken across lines with "break-all" or CJK text to not be broken with "keep-all".

http://caniuse.com/#feat=getcomputedstyle
The getComputedStyle DOM method provides a way to retrieve the current styles applied to any given element or element's pseudo-classes.
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Time for more features, CSS Filter Effects allow many different visual effects on elements, previously only possible using SVG. Note that the spec has not yet reached Working Draft status, so for now it's still considered an unofficial feature.

The other feature is repeating gradients, which allows CSS gradients to continue in a repeated fashion. Support is largely the same as that of regular CSS gradients.
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Previously the browser comparison mode allowed you to select two browser versions and see the differences of feature support between them.

Now there is no longer a limit of browser versions to compare, and the table will show all features, starting with those that see the most support in the selected browsers.

Additionally, based on your feedback, the SPDY protocol has now been added as a listed feature on the site.
WCIU update: Improvements to browser comparison + new feature. 2012-05-02 07:52:10. Previously the browser comparison mode allowed you to select two browser versions and see the differences of feature...
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Official page for the "When can I use..." Browser/web feature compatibility site.
Introduction
The "When can I use..." site offers compatibility tables for support of HTML5, CSS3, SVG and more in desktop and mobile browsers.

This page will have announcements on updates of the site, similar to the RSS feed and twitter account.