MICROSOFT_PRESS_EBOOK_INTRODUCING_WINDOWS_10
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EdgeHTML, interoperability is even more important: Microsoft says its developers have invested<br />
significant effort in EdgeHTML to help developers avoid having to deal with cross-browser<br />
inconsistencies.<br />
■■<br />
Trident (Mshtml.dll), the rendering engine that has been part of Internet Explorer for two<br />
decades, will continue to be available as a stable, consistent web platform for use in Internet<br />
Explorer 11. Trident will continue to receive security and compatibility updates for all supported<br />
Windows platforms, including Windows <strong>10</strong>. It will not, however, add new features or support<br />
for additional web standards; those development efforts are reserved exclusively for the new<br />
rendering engine and Microsoft Edge.<br />
Note For a detailed list of the status of web-standards support in both rendering engines,<br />
see https://status.modern.ie. Standards that are implemented only in EdgeHTML are currently<br />
identified as Preview Release. With a few exceptions, standards that are listed as<br />
Under Consideration or In Development (Touch Events, for example) will be available only in<br />
EdgeHTML.<br />
For a graphic illustration of the common code that underlies the two browsers, check the properties<br />
for each file (as found in C:\Windows\System32). Note that the Product Version is identical for each, as<br />
shown here.<br />
Even by the accelerated standards of Windows <strong>10</strong> development, Microsoft Edge is developing at a<br />
rapid pace. It was a relatively late addition to the Windows <strong>10</strong> Technical Preview, showing up under the<br />
code name “Project Spartan” in publicly available preview builds some five months after the program<br />
began.<br />
The first official release of Microsoft Edge coincided with the general availability of Windows <strong>10</strong> in<br />
July 2015. In November 2015, Microsoft released a major platform update for Microsoft Edge, bringing<br />
the browser to version 25 and the EdgeHTML rendering engine to version 13; this release also adds<br />
major improvements to Chakra, the JavaScript engine that powers Microsoft Edge.<br />
Version information is available under the Settings menu in Microsoft Edge.<br />
CHAPTER 6 Microsoft Edge and Internet Explorer 11 79