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Internet Explorer supports the readyState property on the document...

http://msdn.microsoft.com/en-us/library/ie/ms534359(v=vs.85).aspx

But which version of IE was this introduced in?

Andy Hume
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  • It was introduced in December 1997 update IE4.01. Not supported by other UA's up to DOM Core Level 3. Even though it was proposed to W3C one year ahead and it was part of the working draft... – Bekim Bacaj Aug 15 '16 at 04:14

1 Answers1

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it was introduced in IE4: see here

kingkode
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