WebAssembly Design Documents
Clone or download
hansoksendahl and binji Updated conversion anchor links to correct id (#1223)
These two anchor links were referencing the wrong URL.

Updated `#datatype-conversions` to `#datatype-conversions-truncations-reinterpretations-promotions-and-demotions`
Latest commit 14c81a6 Aug 3, 2018
Permalink
Failed to load latest commit information.
.gitignore add initial JS API spec (#659) May 3, 2016
BinaryEncoding.md Updated conversion anchor links to correct id (#1223) Aug 3, 2018
CAndC++.md rewrite URLs (http:// -> https://) (#1205) May 4, 2018
CodeOfConduct.md Fix email, add visibility note. Jun 23, 2015
Contributing.md Contributing: affiliation Oct 8, 2015
DynamicLinking.md Tagging future features with icon. (#839) Oct 28, 2016
Events.md rewrite URLs (http:// -> https://) (#1205) May 4, 2018
FAQ.md rewrite URLs (http:// -> https://) (#1205) May 4, 2018
FeatureTest.md Fixup links to future features (#1157) Nov 15, 2017
FutureFeatures.md Add Reference Types to Future Proposals (#1216) Jun 20, 2018
HighLevelGoals.md Fixup links to future features (#1157) Nov 15, 2017
JITLibrary.md Fixup links to future features (#1157) Nov 15, 2017
JS.md rewrite URLs (http:// -> https://) (#1205) May 4, 2018
LICENSE Initial commit Apr 29, 2015
MVP.md Merge PostMVP into FutureFeatures for clarity. (#845) Oct 30, 2016
Modules.md Revise the design document of Module. (#1189) Mar 8, 2018
NonWeb.md Replace `opcode` and `operation` to `operator. Oct 23, 2015
Nondeterminism.md Fixup links to future features (#1157) Nov 15, 2017
Portability.md Fixup links to future features (#1157) Nov 15, 2017
README.md Fixup links to future features (#1157) Nov 15, 2017
Rationale.md rewrite URLs (http:// -> https://) (#1205) May 4, 2018
Security.md rewrite URLs (http:// -> https://) (#1205) May 4, 2018
Semantics.md Fixup links to future features (#1157) Nov 15, 2017
TextFormat.md Pointer to tentative official text format (#1012) Mar 9, 2017
Tooling.md fix improperly spaced markdown blocks and typos (for formatting on we… Oct 26, 2016
UseCases.md Remove space Feb 20, 2017
Web.md Fixup links to future features (#1157) Nov 15, 2017

README.md

WebAssembly Design

This repository contains documents describing the design and high-level overview of WebAssembly.

The documents and discussions in this repository are part of the WebAssembly Community Group.

Overview

WebAssembly or wasm is a new, portable, size- and load-time-efficient format suitable for compilation to the web.

WebAssembly is currently being designed as an open standard by a W3C Community Group that includes representatives from all major browsers. Expect the contents of this repository to be in flux: everything is still under discussion.

  • WebAssembly is efficient and fast: Wasm bytecode is designed to be encoded in a size- and load-time-efficient binary format. WebAssembly aims to execute at native speed by taking advantage of common hardware capabilities available on a wide range of platforms.

  • WebAssembly is safe: WebAssembly describes a memory-safe, sandboxed execution environment that may even be implemented inside existing JavaScript virtual machines. When embedded in the web, WebAssembly will enforce the same-origin and permissions security policies of the browser.

  • WebAssembly is open and debuggable: WebAssembly is designed to be pretty-printed in a textual format for debugging, testing, experimenting, optimizing, learning, teaching, and writing programs by hand. The textual format will be used when viewing the source of wasm modules on the web.

  • WebAssembly is part of the open web platform: WebAssembly is designed to maintain the versionless, feature-tested, and backwards-compatible nature of the web. WebAssembly modules will be able to call into and out of the JavaScript context and access browser functionality through the same Web APIs accessible from JavaScript. WebAssembly also supports non-web embeddings.

More Information

Resource Repository Location
High Level Goals design/HighLevelGoals.md
Frequently Asked Questions design/FAQ.md
Language Specification spec/README.md

Design Process & Contributing

The WebAssembly specification is being developed in the spec repository. For now, high-level design discussions should continue to be held in the design repository, via issues and pull requests, so that the specification work can remain focused.

We've mapped out features we expect to ship:

  1. An initial Minimum Viable Product (MVP) release;
  2. And soon after in future versions.

Join us:

When contributing, please follow our Code of Ethics and Professional Conduct.