Microsoft has delivered a second platform preview of its Internet Explorer 10 Web browser.
released a second platform preview of its Internet Explorer 10 Web browser.
On June 29, 11
weeks after delivering the first IE10 preview at its MIX11
conference in Las
Vegas, Microsoft delivered its IE10 Platform Preview 2 with support for
site-ready HTML5 technologies and improved performance and security. The new
IE10 build is available for download here
In a blog post
on the new release, Dean
Hachamovitch, corporate vice president for Internet Explorer at Microsoft,
said, "Developers will be able to build even more amazing sites and
applications (beyond these
) with IE10's improved HTML5 support. As different
browsers support developers using the same markup to achieve the same results
with great performance, we can all realize the promise of HTML5 applications."
With that in
mind, Hachamovitch said Microsoft has posted over
270 new tests
to the IE Test Center and submitted them to standards
citing the IE10 developer guide
, Hachamovitch listed some of
the new features in IE10 Platform Preview 2, including the following:
and interactive Web applications are easier to deliver with support for
several new technologies like CSS3 Positioned Floats, HTML5 Drag-drop,
File Reader API, Media Query Listeners and initial support for HTML5
application performance improves across the board, as does the ability to
deliver better performance with more efficient use of battery life with
new technologies like Web Workers with Channel Messaging, Async script
support and others.
application security improves using the same markup with support for HTML5
Sandbox for iframe isolation.
said the new IE10 Platform Preview includes parsing improvements from the W3C (World
Wide Web Consortium) HTML5 spec, reflecting that developers can now expect the
same behavior in all compliant browsers even for imperfect or invalid markup.
HTML5 is the
first version of HTML to define the behavior of invalid markup, Hachamovitch
said. "Rather than relying on "fix-up" rules that vary from browser to browser,
HTML5 parsing behavior is now specified in a way that developers can count on
it," he said. "IE10 now supports the File Reader API and HTML5 Forms
validation, as well as advanced hit testing for more complex selection scenarios
like graphics editors, games and other applications that typically use multiple
Hachamovitch says IE10 is the first browser to support several new performance
APIs coming out of the W3C's working groups. The test drives for setImmediate,
requestAnimationFrame and PageVisibility illustrate how these APIs enable
developers to make the Web faster and more responsive even while Websites make
better use of battery life on mobile devices, he said. Meanwhile, Web workers enable
a host of new programming scenarios for the Web, he added. With them, Web
the background, Hachamovitch said.
At the launch
of the IE10 Platform Preview 1 in April, Microsoft said it would begin
releasing new builds of IE10 every three months. Prior to that, Microsoft was
releasing new IE builds every eight weeks.