[Informative] Observable changes of Unicode 18 #3990

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1. mathiasbynens commented on Oct 1, 2026

   

   mathiasbynens

   on Oct 1, 2026

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   I believe there’s a mistake in the reported Case_Folding results. I’ve patched my old script and it produces:

   $ node compare.mjs
   Comparing Unicode v18.0.0 to Unicode v17.0.0…
   Binary_Property: 0 new values
   General_Category: 0 new values
   Script: 3 new values
   - Jurchen (Jurc)
   - Proto_Cuneiform (Pcun)
   - Seal (Seal)
   Script_Extensions: 3 new values
   - Jurchen (Jurc)
   - Proto_Cuneiform (Pcun)
   - Seal (Seal)
   Sequence_Property: 0 new values
   Binary_Property/ID_Start: 0 removals
   Binary_Property/ID_Start: 12,823 new code points
   Binary_Property/ID_Continue: 0 removals
   Binary_Property/ID_Continue: 12,860 new code points
   General_Category/Space_Separator: 0 removals
   General_Category/Space_Separator: 0 new code points
   Case_Folding=S: 0 removals
   Case_Folding=S: 1 new code points
   Case_Folding=F: 0 removals
   Case_Folding=F: 1 new code points
   
2. mathiasbynens

   added

   unicodeRelates to upstream Unicode updates.Relates to upstream Unicode updates.

   on Oct 1, 2026