Issues

• Protocol.union() name seems confusing

  tc39/proposal-first-class-protocols#96 · Filter by author hax opened on May 28, 2026
  1

• Tree-shakeable protocol definitions

  tc39/proposal-first-class-protocols#95 · Filter by author legendecas opened on Mar 16, 2026
  18

• Literal (string-major) protocols?

  tc39/proposal-first-class-protocols#94 · Filter by author LeaVerou opened on Mar 12, 2026
  1

• implements operator vs instanceof + Symbol.hasInstance

  tc39/proposal-first-class-protocols#93 · Filter by author LeaVerou opened on Mar 12, 2026
  1

• do new operators need to be introduced?

  tc39/proposal-first-class-protocols#92 · Filter by author samualtnorman opened on Mar 12, 2026
  1

• what's the prototype of a protocol look like?

  tc39/proposal-first-class-protocols#91 · Filter by author michaelficarra opened on Mar 12, 2026
  3

• Alternatives to implements?

  tc39/proposal-first-class-protocols#90 · Filter by author LeaVerou opened on Mar 11, 2026
  5

• P[Protocol.members] as a shortcut for Protocol.describe(P).members?

  needs consensus
  tc39/proposal-first-class-protocols#89 · Filter by author LeaVerou opened on Mar 11, 2026
  3

• What does super.foo resolve to in protocol methods, if anything?

  needs consensus
  tc39/proposal-first-class-protocols#88 · Filter by author LeaVerou opened on Mar 8, 2026
  4

• Should constructor and prototype be special-cased to always be strings?

  Agenda+needs consensus
  tc39/proposal-first-class-protocols#84 · Filter by author LeaVerou opened on Feb 25, 2026 · Mar 2026 plenary
  2

• Protocol representation as object literal

  Agenda+needs consensus
  tc39/proposal-first-class-protocols#82 · Filter by author LeaVerou opened on Feb 24, 2026

• Do sub-protocol members create members on the parent protocol?

  Agenda+needs consensus
  tc39/proposal-first-class-protocols#81 · Filter by author LeaVerou opened on Feb 24, 2026
  6

• What happens with duplicate members?

  needs consensus
  tc39/proposal-first-class-protocols#80 · Filter by author LeaVerou opened on Feb 24, 2026 · Mar 2026 plenary
  4

• Do we need a satisfies operator?

  needs consensus
  tc39/proposal-first-class-protocols#78 · Filter by author LeaVerou opened on Feb 11, 2026 · Later
  14

• Relationship with decorators

  needs consensus
  tc39/proposal-first-class-protocols#77 · Filter by author LeaVerou opened on Feb 11, 2026 · Later
  2

• If a provided method already exists, the existing one should win (not error)

  needs consensus
  Task

  tc39/proposal-first-class-protocols#76 · Filter by author bakkot opened on Jan 8, 2026
  23

• Defer implemented by?

  tc39/proposal-first-class-protocols#63 · Filter by author LeaVerou opened on Jan 6, 2026 · Later
  11

• Can provided members satisfy other protocols?

  tc39/proposal-first-class-protocols#61 · Filter by author LeaVerou opened on Jan 6, 2026 · Mar 2026 plenary
  14

  

• Are "foo" and foo distinct members?

  Agenda+
  tc39/proposal-first-class-protocols#59 · Filter by author LeaVerou opened on Jan 6, 2026 · Mar 2026 plenary
  10

• Relationship to auto-accessors proposal

  tc39/proposal-first-class-protocols#49 · Filter by author LeaVerou opened on Nov 20, 2025 · Later
  3

• Option for host classes to auto-generate string glue code

  Agenda+needs bikeshedding
  tc39/proposal-first-class-protocols#47 · Filter by author LeaVerou opened on Nov 20, 2025 · Mar 2026 plenary
  17

  

• Optional fields

  tc39/proposal-first-class-protocols#30 · Filter by author Jamesernator opened on Nov 14, 2017 · Later
  19

• Inheritance of symbols from parent to child

  Agenda+needs consensus
  tc39/proposal-first-class-protocols#23 · Filter by author jamiebuilds opened on Oct 2, 2017
  18

• Notify protocol when it is implemented

  tc39/proposal-first-class-protocols#13 · Filter by author dead-claudia opened on Sep 6, 2017
  4

• enforce constraints on implemented functions; start by at least checking their signatures

  Enhancement

  tc39/proposal-first-class-protocols#4 · Filter by author gabejohnson opened on Jun 16, 2017 · Later
  10