New Blob Constructor in IE10

IE10 in Windows 8 Release Preview adds support for a Blob constructor. We earlier wrote about and demonstrated IE10’s support for a BlobBuilder interface, an in-progress interface in the File API: Writer W3C Working Draft. This interface enables developers to work with files on the client PC. Recently, the W3C working group deprecated the BlobBuilder…

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XMLHttpRequest responseXML in IE10 Release Preview

IE10 in Windows 8 Release Preview updates the responseXML from an XMLHttpRequest to return a native XML document by default. This change applies to IE10’s Standards and Quirks document modes, making them interoperable with other modern browsers and consistent with a “same markup” approach. Compatibility document modes 5, 7, 8, and 9 are unchanged. This…

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IE10 User Agent String Update

The IE10 user agent string was originally introduced in the first platform preview of IE10. In Windows 8 Release Preview we made two additions to aid server-side feature detection. The first addition enables detecting whether a machine has touch-capable hardware via a new Touch token. Using this token you can present a touch-friendly version of…

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Unprefixed CSS3 Gradients in IE10

IE10 in the Windows 8 Release Preview supports the W3C Candidate Recommendation for CSS Gradients in their unprefixed form. IE10 also supports the older CSS Gradients syntax from the W3C Working Draft of 17 February 2011 behind the vendor prefix -ms-. Thisblog post describes the differences between the old and new syntax and behavior and…

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Under the Hood: Bubbles

In an earlier post we discussed JavaScript performance improvements introduced in IE10. Today we published Bubbles, originally inspired by Alex Gavriolov’s simulation BubbleMark, to explore some of these advances. The current version has been greatly expanded to take advantage of the new features of the Web platform and includes characteristics common to HTML5 games. In…

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Advances in JavaScript Performance in IE10 and Windows 8

Thursday, May 31, 2012, we delivered the Windows 8 Release Preview and the Sixth IE10 Platform Preview. Windows 8 includes one HTML5 browsing engine that powers both browsing experiences (Metro style and desktop) as well as Metrostyle applications that use HTML5 and JavaScript. The release preview represents a major revision of the same modern JavaScript…

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High Quality Visuals for Pinned Sites in Windows 8

Pinned Sites in Windows 8 describes how site developers can provide a site icon (favicon) for their sites’ pinned site tiles on the Windows 8 Start screen. Many of you shared feedback that you’d like to provide higher-resolution visuals to better depict your site brand on your users’ pinned site tiles. In Windows 8 Release…

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Moving the Stable Web Forward in IE10 Release Preview

As part of Windows 8 Release Preview planning, we reviewed all the W3C draft standards supported by IE10. In particular, we looked for those specifications that: Are stable, that is, there were no recent additions or changes and no renaming or major changes are expected; Are supported by at least two browsers other than IE10;…

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Legacy DX Filters Removed from IE10 Release Preview

Internet Explorer’s commitment to achieving the goal of consistent “same markup, same results” across browsers is evidenced, in part, by IE9’s and IE10’s addition of CSS3 features that enable Web sites to move to standards-based features for their graphical effects. Earlier we wrote that Internet Explorer’s legacy visual filters and transitions, first introduced in IE4, are…

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Windows Release Preview: The Sixth IE10 Platform Preview

With IE10 in Windows 8, we reimagined the browser. We designed and built IE10 to be the best way to experience the full Web on Windows. Consumers can now enjoy more touch-friendly, fast and fluid Web applications with the updated IE10 engine included in the Windows Release Preview. This sixth Platform Preview of IE10 delivers…

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