Issues

• Flow has released Pattern Matching

  tc39/proposal-pattern-matching#340 · Filter by author bradzacher opened on Jun 28, 2025
  3

• Clause separators

  tc39/proposal-pattern-matching#337 · Filter by author gkz opened on Dec 10, 2024
  11

• Should we allow super [ Expression ] in PatternMatchingMemberExpression?

  tc39/proposal-pattern-matching#331 · Filter by author JLHwung opened on Jul 6, 2024
  3

• Disallow { a }

  tc39/proposal-pattern-matching#325 · Filter by author Jack-Works opened on Apr 12, 2024
  9

• Do we need iterator/object property caching?

  tc39/proposal-pattern-matching#324 · Filter by author littledan opened on Apr 11, 2024
  35

• Syntax effects on rest of the language

  tc39/proposal-pattern-matching#323 · Filter by author waldemarhorwat opened on Apr 11, 2024

• Proposed simplification & increased symmetry

  tc39/proposal-pattern-matching#322 · Filter by author erights opened on Apr 9, 2024
  53

• How do if(<expression>) guard patterns interact with array/object pattern caches?

  tc39/proposal-pattern-matching#321 · Filter by author gibson042 opened on Mar 18, 2024
  4

• Many README "Examples" blocks are empty

  tc39/proposal-pattern-matching#320 · Filter by author gibson042 opened on Mar 18, 2024
  3

• NaN/undefined/Infinity should be matched as bindings rather than static values

  tc39/proposal-pattern-matching#317 · Filter by author gibson042 opened on Mar 18, 2024
  4

• I have written a Pattern Matching library. RFC

  tc39/proposal-pattern-matching#316 · Filter by author sumanthyedoti opened on Mar 12, 2024

• JSON.parse[@@customMatcher]?

  tc39/proposal-pattern-matching#310 · Filter by author Jack-Works opened on Nov 30, 2023
  6

• Consider type annotations as pattern syntax

  tc39/proposal-pattern-matching#309 · Filter by author kaleidawave opened on Nov 24, 2023
  2

• Syntax feature layering

  tc39/proposal-pattern-matching#306 · Filter by author Jack-Works opened on Oct 6, 2023

• Could we re-evaluate what our "must-haves" are?

  tc39/proposal-pattern-matching#305 · Filter by author rkirsling opened on Oct 5, 2023
  9

• Dropping when keyword from match clauses?

  tc39/proposal-pattern-matching#304 · Filter by author tabatkins opened on Oct 3, 2023
  17

• Statement version of match expression

  tc39/proposal-pattern-matching#294 · Filter by author Jack-Works opened on Sep 4, 2023
  8

• Allow providing error message in Matcher protocol

  tc39/proposal-pattern-matching#292 · Filter by author theScottyJam opened on Jul 12, 2023
  4

• Grammar ambiguities

  tc39/proposal-pattern-matching#275 · Filter by author waldemarhorwat opened on Jul 12, 2022
  5

• Add a more relevant react example using react-query

  tc39/proposal-pattern-matching#270 · Filter by author kasperpeulen opened on Jul 10, 2022
  4

• Confirm missing constructor matchers

  champion group discussionquestion
  tc39/proposal-pattern-matching#266 · Filter by author ljharb opened on Jul 8, 2022
  4

• Should we allow "PrivateIdentifier: MatchElement" under a MatchProperty?

  tc39/proposal-pattern-matching#250 · Filter by author JLHwung opened on Mar 23, 2022
  2

• Proposal slides link of May 2018 TC39 meeting is broken

  tc39/proposal-pattern-matching#247 · Filter by author F3n67u opened on Mar 8, 2022
  7

• Path to Stage 4!

  stage process tracking
  tc39/proposal-pattern-matching#175 · Filter by author ljharb opened on Apr 21, 2021
  11