Platform Preview 4 (PP4) release )Â only works on Windows 8. This is not an update to the Platform Preview of IE 10 on Windows 7 but this release is for IE 10 on the Developer Preview pre-beta build of Windows 8 only. IE 10 PP4 Â is said to add even more support for HTML5 technologies, enabling richer Web applications. Some of the additions:
- Support for JavaScript typed arrays for efficient storage and manipulation of typed data.
- Addition of the 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.
- Support for CORS (cross origin resource sharing), which allows developers to use XMLHttpRequest to request, share and move data across applications on different domains.
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