Bevan Rudge JavaScript and web technologist

Microsoft announced in January that Internet Explorer 8 (IE8) would be standards-compliant, but only if you included a special meta tag or http header indicating that the page should be rendered in standards compliance mode. The uproar from the standards community led Microsoft to change the default behavior of IE8. Now IE8 will render all pages in standards mode by default, unless you specify otherwise with the X-UA-Compatible meta tag or http header. Interestingly, the Microsoft followers did not seem to feel short-changed as the standards advocates had.
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