Microsoft on Tuesday released the fourth platform preview of Internet Explorer 10. Just like the one before it, this latest platform preview release is not meant for Windows 7. Instead, it requires Windows 8 Developer Preview, a pre-beta build of the next version of Windows that was released a couple of months back at Microsoft’s BUILD conference. Hit the jump for more on this release, which packs a heavier HTML5 punch than its predecessors.
This build features a number of new “site-ready” HTML5 features for developers to experiment with. Some of its most notable features, as listed on the IEBlog, are:
Cross-Origin Resource Sharing (CORS) for safe use of XMLHttpRequest across domains.
File API Writer support for blobBuilder allowing manipulation of large binary objects in script in the browser.
CSS user-select property to control how end-users select elements in a Web page or application.
Support for HTML5 video text captioning, including time-code, placement, and captioning file formats.
But the lack of Windows 7 support is baffling a lot of people, something which is more than clear from some of the comments on the blog post announcing the availability of this IE10 build. When faced with questions over this issue in the comments section, Microsoft promised the “release of an IE10 Beta and Release Candidate on Windows 7 prior to IE10’s general availability.”