ECMAScript is the standard that defines the language commonly known as
JavaScript. Version 3 has been stable for about a decade. Version 1 is
very, very old. Version 2 was just a minor bug release. Version 4 was
never released. Version 5 is brand new and is being implemented
currently. Firefox 4 seems likely to be the first browser that ships
with an ES5 implementation.
"JavaScript" is a name with trademark restrictions, or something, which
is why Microsoft calls their version "JScript". Version numbers
following "JavaScript" are Mozilla-specific.
All you really need to know is that all browsers have supported ES3 for
years and all will eventually support ES5. I don't think IE9 will
support ES5, however, so we may have to wait for IE10 before we have a
full set of current browsers that support the language.
David Flanagan
On 12/07/2010 06:24 AM, Acaz Souza Pereira wrote:
I know that have ECMAScript 3th edition and 5th edition.
But exist JavaScript 1.5 and 1.6, what the purpose of each?
ECMAScript is all about language syntax? I don't understand.
Thank you guys.
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