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i am a bit lost track with the MDN docs.

https://developer.mozilla.org/en-US/docs/Web/Reference/Events/readystatechange

In the above onreadystatechange specification, it says "HTML5". So does it mean onreadystatechange is a HTML5 event, and pre-HTML5 browsers should not understand it? However, i have tested in IE6 (through IE Tester), it works like in my latest Firefox.

So it is confusing. Thanks for any inputs.

midnite
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  • Large parts of HTML5 APIs are only the specification of stuff that was implemented in browsers before already. – CBroe Dec 09 '13 at 08:53
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    A feature may be part of a particular specification, in this case HTML5, but that's not to say it hasn't been implemented already in older browsers. In fact, most features make it into a spec precisely because they are already popular in various browsers. – Graham Dec 09 '13 at 08:54
  • Did you read the page you're linking to ? "This event has long been supported by Internet Explorer ...." – adeneo Dec 09 '13 at 08:55
  • @adeneo Oh yes! ... Yup i read that. But that was still confusing to me. I think the answer is, as @ Graham says, specifications & features are not having some strict relationships... – midnite Dec 09 '13 at 08:59

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