Fourth IE9 Platform Preview Available. Next IE9 BetaIE9 started from the premise that the modern web will deliver HTML5 experiences that feel more like native applications than sites. Building on hardware-accelerated SVG, canvas, video, audio, and text, developers will use the power of the whole PC to achieve great performance. On the modern web, developers will use the same markup across different HTML5 browsers. The fourth Platform Preview of Internet Explorer 9, available now, shows the opportunity of fully hardware-accelerated HTML5. You can run new test drive samples that show modern SVG and native JavaScript integration in action. In March, we promised to deliver platform preview releases approximately every eight weeks. With this installment, you will find more performance and more support for same markup. Getting sites ready for Beta With the fourth Platform Preview, we strongly recommend developers, designers, and partners to start getting your sites ready for the IE9 Beta. Test your site in IE9 Standards Mode. This mode provides the best performance and interoperability and will offer additional benefits in the IE9 Beta. We suggest using the HTML5 doctype. More details here and here. We recommend sending IE9 the same standards-based markup your site sends other browsers. More details here and here. From the feedback so far, and our experience with sites, the best way to get your site working in IE9 Standards Mode is to start from the same markup other browsers receive rather than IE6, IE7, or IE8 markup. Use feature detection, not browser detection to handle any cross browser differences in behavior or feature support. This keeps your site working even as browsers change. Please continue to report issues on Connect if your site doesn’t look or work right, and you’re giving it the same code as you’re giving to other modern browsers. With IE9 Platform Preview 4, we’ve fixed over 100 community-reported issues. We will fix even more between now and the IE9 beta and want your feedback. Consider the experience for IE9 Beta users if you find that sending the same markup creates more issues than you can resolve in your production site. It is possible that running your site in Compatibility View is better for your users. Take advantage of HTML5, CSS3, SVG, DOM, ES5, and more… all described here in the developer guide. We’re excited to run the amazing experiences you bring to the web using these new capabilities, taking advantage of hardware through IE9. Continue at IE Engineering Blog
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