In The Unicode Standard, Javanese script implementation is discussed in  Chapter 17 Indonesia and Oceania.

The Javanese script was encoded in The Unicode Standard version 5.2. The script is encoded in the following block:

BlocksCharacter RangeAdded in Unicode VersionUnicode Chart
Javanese A980..A9DF 5.2  UA980.pdf

A number of proposals for its inclusion have been submitted to the Unicode Technical Committee and WG2:

1992-10-29 Kawi / Javanese / Balinese — Rick McGowan ( Unicode Technical Report #3 R2)

1998-02-23 Javanese Proposal: Proposal for the encoding of the Javanese Script — Jeroen Hellingman ( L2/98-041)

2006-03-13 Proposal for encoding the Javanese Script in the UCS (A900-A97F) — Teguh Budi Sayoga ( L2/06-080)

2007-07-31 Preliminary proposal for encoding the Javanese script in the UCS — Michael Everson ( WG2 N3292,  L2/07-232)

2007-07-31 Comment on L2/07-232 - Suggestion to encode Javanese in the SMP — Karl Pentzlin ( L2/07-237)

2007-08-01 Re L2/07-237 Comment on L2/07-232 Suggestion to encode Javanese in the SMP — Deborah Anderson ( L2/07-248)

2007-09-11 Javanese government support for encoding the Javanese script — Michael Everson ( WG2 N3329,  L2/07-298)

2008-03-06 Proposal for encoding the Javanese script in the UCS — Michael Everson ( WG2 N3319,  L2/07-295,  L2/08-015)

2009-04-10 Name correction for FPDAM 6: Javanese A9C0 JAVANESE PANGKON — Deborah Anderson ( WG2 N3613,  L2/09-122)

2014-02-05 A bag of suggested improvements to Unicode’s provisional Indic properties — Roozbeh Pournader, Behdad Esfahbod ( L2/14-065)

2014-05-08 Improvements requested for Unicode Indic properties (two text file appendices are included) — Roozbeh Pournader ( L2/14-126)

2017-01-21 Indic positional category for Javanese cakra — Norbert Lindenberg ( L2/17-038)

Recommendations to UTC #150 January 2017 on Script Proposals ( L2/17-037) (See point 11.)

UTC #150 Minutes ( L2/17-016) (See B.14.5 for decision and action items)