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Flatten trees with inline fields where appropriate

enhancementFeature request (that does not concern language semantics, see "language")Feature request (that does not concern language semantics, see "language")

Status: Open.

#5339 In scala-js/scala-js;

· gzm0 opened on Mar 15, 2026

Proposal: Minimal Wasm module kind and interop.

languageAffects language semantics.Affects language semantics.

Status: Open.

#5333 In scala-js/scala-js;

· sjrd opened on Mar 10, 2026

Introduce a new GroupModulesFor modules split style

enhancementFeature request (that does not concern language semantics, see "language")Feature request (that does not concern language semantics, see "language")

Status: Open.

#5320 In scala-js/scala-js;

· grzegorz-bielski opened on Feb 11, 2026

Reconsider returning null from getClass for JS classes

languageAffects language semantics.Affects language semantics.

Status: Open.

#5291 In scala-js/scala-js;

· gzm0 opened on Jan 3, 2026

·  

v2.x (not planned)

sbt 2 support

Status: Open.

#5238 In scala-js/scala-js;

· xuwei-k opened on Sep 13, 2025

Support Generators, function*, and yield

languageAffects language semantics.Affects language semantics.

Status: Open.

#5079 In scala-js/scala-js;

· armanbilge opened on Nov 20, 2024

Wasm: Make class fields immutable at the Wasm level

optimizationOptimization only. Does not affect semantics or correctness.Optimization only. Does not affect semantics or correctness.

wasmApplies to the WebAssembly backend onlyApplies to the WebAssembly backend only

Status: Open.

#5039 In scala-js/scala-js;

· tanishiking opened on Sep 17, 2024

Support java.io.BufferedWriter

missing javalibReport of something from the JDK that is missing (does not link)Report of something from the JDK that is missing (does not link)

Status: Open.

#5014 In scala-js/scala-js;

· ThijsBroersen opened on Aug 16, 2024

1.16.0 does not work sbt run with Scala 2.13.12 or lower versions due to SIP-51

Status: Open.

#4995 In scala-js/scala-js;

· xuwei-k opened on Jun 4, 2024

Make Scala.js Wasm backend suitable for standalone Wasm VMs (a.k.a. support "server-side Wasm")

enhancementFeature request (that does not concern language semantics, see "language")Feature request (that does not concern language semantics, see "language")

languageAffects language semantics.Affects language semantics.

wasmApplies to the WebAssembly backend onlyApplies to the WebAssembly backend only

Status: Open.

#4991 In scala-js/scala-js;

· tanishiking opened on May 29, 2024

FewestModules OOMs with dynamic dependencies

needs reproductionWe need a reproduction from the reporter before we can move forward.We need a reproduction from the reporter before we can move forward.

Status: Open.

#4985 In scala-js/scala-js;

· gzm0 opened on May 17, 2024

Locals stored as private symbols on non-native JS types have surprising JS semantics

Status: Open.

#4968 In scala-js/scala-js;

· steinybot opened on Mar 20, 2024