WebAssembly proposals
Active proposals
Proposals follow this process document.
Phase 5 - The Feature is Standardized (WG)
These proposals have not yet been merged to the spec. Merged proposals are listed in Finished Proposals.
| Proposal | Champion |
|---|
Phase 4 - Standardize the Feature (WG)
| Proposal | Champion |
|---|
Phase 3 - Implementation Phase (CG + WG)
| Proposal | Champion |
|---|---|
| Tail call | Andreas Rossberg |
| Multiple memories | Andreas Rossberg |
| Custom Annotation Syntax in the Text Format | Andreas Rossberg |
| Memory64 | Wouter van Oortmerssen |
| Exception handling | Heejin Ahn |
| Web Content Security Policy | Francis McCabe |
| Branch Hinting | Yuri Iozzelli |
| Extended Constant Expressions | Sam Clegg |
| Relaxed SIMD | Marat Dukhan & Zhi An Ng |
Phase 2 - Proposed Spec Text Available (CG + WG)
| Proposal | Champion |
|---|---|
| Threads | Conrad Watt |
| ECMAScript module integration | Asumu Takikawa & Ms2ger |
| Type Reflection for WebAssembly JavaScript API | Till Schneidereit |
| Typed Function References | Andreas Rossberg |
| Relaxed dead code validation | Conrad Watt and Ross Tate |
| Numeric Values in WAT Data Segments | Ezzat Chamudi |
| Instrument and Tracing Technology | Richard Winterton |
| Garbage collection | Andreas Rossberg |
| JS Promise Integration | Ross Tate and Francis McCabe |
Phase 1 - Feature Proposal (CG)
| Proposal | Champion |
|---|---|
| Type Imports | Andreas Rossberg |
| Interface Types | Luke Wagner and Francis McCabe |
| WebAssembly C and C++ API | Andreas Rossberg |
| Feature Detection | Thomas Lively |
| Extended Name Section | Andrew Scheidecker |
| Flexible Vectors | Petr Penzin |
| Call Tags | Ross Tate |
| Module Linking | Luke Wagner and Andreas Rossberg |
| Stack Switching | Francis McCabe & Sam Lindley |
| Constant Time | Sunjay Cauligi, Garrett Gu, John Renner, Hovav Shacham, Deian Stefan, Conrad Watt |
| JS Customization for GC Objects | Asumu Takikawa |
| Memory control | Deepti Gandluri |
Phase 0 - Pre-Proposal (CG)
| Proposal | Champion |
|---|---|
| Funclets: Flexible Intraprocedural Control Flow | Dan Gohman |
Implementation status
Roadmap is available on https://webassembly.org/roadmap/
Contributing new proposals
Please see Contributing to WebAssembly for the most up-to-date information on contributing proposals to standard.