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First results of Web Compatibility Test — 22 April 2008

The responses to the announce last week of the Web Compatibility Test for Mobile Browsers have been extremely positive: thanks to all of you who have already sent screenshots (most of them have been added to the gallery of screenshots), and keep them coming in, they are a great way for us to assess the current level of support of many technologies at a glance, in a wide variety of browsers!

As an incentive, here is an approximate view of what the screenshots we've received so far look like, when averaged together:

Superposition of screenshots in various browsers of the Web Compatibility Test

A quick analysis of the repartition of colors across tests seems to show that the baseline technologies (CSS 2, PNG, gzip and HTTPs) are fairly well supported, although not completely so.

The second and third line are much less brillant though, with SVG support being clearly lacking, and contenteditable being surprisingly widely supported - but I strongly suspect our test is actually too loose for that one. XMLHTTPRequest isn't all red, but far from all green either.

Of course, this isn't in any way whatsoever a good statistical analysis of the deployed browsers on the market; there are many bias in the way the screenshots were collected, and I had to get rid of some of the most distorted ones as they would have had a too bad impact on the final image.

But I hope it serves as an encouragement for submitting more of these screenshots, and sending us feedback (cf Permalink

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Contacts: Dominique Hazael-Massieux