JavaScript 2.0
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JavaScript 2.0
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Monday, July 26, 1999
JavaScript 2.0 is an experimental proposal maintained by waldemar for future changes in the JavaScript language. At this stage the emphasis is on developing the broad concepts of the language; many of the details will be worked out later. The eventual language may differ significantly from this proposal, but the goal is to move in the directions indicated here and do so via a coordinated plan rather than adding miscellaneous features ad hoc on a release-by-release basis.
The following are recent major changes in this document:
| Date | Revisions |
|---|---|
| Jul 26, 1999 | Wrote description of semantic notation. Updated grammar
notation page to describe lookahead constraints. Updated regular expression semantics
to match ECMA working group decisions for ECMAScript Edition 3; one of these included changing the behavior of (?=
to not backtrack. |
| Jun 7, 1999 | Revised all grammars and semantics to simplify the grammars. Fixed several errors and omissions in the regular expression
grammar and semantics. Added support for (?=
and (?!. |
| May 16, 1999 | Added regular expression grammar and semantics. |
| May 12, 1999 | Added preliminary Formal Description chapter. |
| Mar 25, 1999 | Added Member Lookup page. Released second draft. |
| Mar 24, 1999 | Added many clarifications, discussion sections, and small changes throughout the pages. |
| Mar 23, 1999 | Rewrote Execution Model page and split it off from the Declarations
page. Added discussion of float to Machine Types. |
| Mar 22, 1999 | Removed numbered versions from the Versions page; added motivation, discussion, and version
aliasing using =. Removed angle brackets < and > from VersionsAndRenames. |
| Mar 16, 1999 | Rewrote Types page. Split off byte, ubyte, short, ushort,
int, uint, long, ulong into an optional Machine
Types library. |
| Feb 18, 1999 | Released first draft. |
Older drafts are also available: