Incompatibilities between ES3 and Proposed ES4

Lars Hansen lhansen at
Tue Nov 6 04:09:51 PST 2007

We've put up a document on that details all known
incompatibilities between ES3 and Proposed ES4:

Dave summed it up nicely, I think:

"It's also interesting to think of conservative extension not as an
all-or-nothing property, but to judge incompatibilities in terms of
their impact. This document attempts to enumerate and classify the
different ways the proposed ES4 spec conflicts with the specification of


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