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New site detects compatibility problems and deviation from best practices

From ArsTechnica:
For some months now, Microsoft has been promoting the use of standard HTML5 that avoids targeting specific browsers—particularly WebKit-based browsers like Chrome and Safari—and instead works well in any browser, including its own. The company today launched a new site,, to further promote this agenda and provide tools to help Web developers.

The site has three main components to it. The first is a scanner that examines sites and detects a laundry list of compatibility concerns. These cover a range of issues, from using out-of-date versions of popular JavaScript libraries such as jQuery to using browser-specific CSS without also including standard cross-browser fallbacks.
  Microsoft continues HTML5 push with compatibility initiative