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Missing SIMD shift instructions by non-scalar amounts

simd

Status: Open.

#1586 In WebAssembly/design;

· Vanilagy opened on Jun 4, 2026

JS Builtins general opt-in via builtins: ['js']

Status: Open.

#1585 In WebAssembly/design;

· guybedford opened on May 29, 2026

JS builtin naming guidelines

Status: Open.

#1584 In WebAssembly/design;

· eqrion opened on May 21, 2026

Limit on string lengths (for import names etc)

imports/exports

Status: Open.

#1582 In WebAssembly/design;

· jakobkummerow opened on Apr 1, 2026

Stack pointer overflow detection

integer

linear memory

Status: Open.

#1580 In WebAssembly/design;

· elasota opened on Mar 4, 2026

Single binary for multithreaded and singlethreaded code

documentation

threads

Status: Open.

#1576 In WebAssembly/design;

· eugeneko opened on Oct 24, 2025

A fine-grained JIT Interface: func.new bytecode

dynamic optimization

Status: Open.

#1573 In WebAssembly/design;

· titzer opened on Sep 23, 2025

Sparse memory

linear memory

Status: Open.

#1571 In WebAssembly/design;

· DemiMarie opened on Sep 16, 2025

Multibyte Access to Array i8

managed objects

Status: Open.

#1569 In WebAssembly/design;

· brendandahl opened on Jul 9, 2025

Proposal idea: adding must_throw signature

exception handling

Status: Open.

#1564 In WebAssembly/design;

· carlopi opened on Jun 5, 2025

Custom annotations on functions

text format

Status: Open.

#1563 In WebAssembly/design;

· kripken opened on May 13, 2025

1-byte small local.get would save significant bundle size in real-world code

binary format

Status: Open.

#1560 In WebAssembly/design;

· dead-claudia opened on Apr 25, 2025