The document introduces WebAssembly, including its goals of being portable, fast by being compiled to near native speed, and making it easy to port applications to the web. It describes the workflow as being simple and straightforward. It provides instructions for a "Hello World" example in WebAssembly, including writing the C function, compiling it, adding HTML/JavaScript, and testing it. It discusses the present and future of WebAssembly, noting growing adoption as a web standard by major companies. In conclusion, WebAssembly is a modern binary format intended to run on the web, a tool to integrate C/C++ into web apps, and a growing web standard.

1. Introduction to WebAssembly
Karl Ritchie
December 2017

2. Contents
i. What is WebAssembly
ii. Goals of WebAssembly
iii.Workflow of WebAssembly
iv.Hello World in WebAssembly
v. Present and future of WebAssembly
vi.Conclusion

3. What is WebAssembly
 “WebAssembly or wasm is a new portable, size-
and load-time-efficient format suitable for
compilation to the web.”
 http://webassembly.org/
 In other words, WebAssembly makes it possible to compile
your code and run it on the Web(in a browser), similar to
JavaScript.

4. Goals of WebAssembly
 Goals :
 Portable
 Fast (Compiled and executed at near native speed)
 To make it easy to port your applications to the Web
 Currently C/C++ is main language targeted by WebAssembly
 http://webassembly.org/docs/high-level-goals/

5. Workflow of WebAssembly
 Simple and straight forward implementation workflow.

6. Hello World in WebAssembly
 Initial Setup :
 Follow the Getting Started page on WebAssembly’s Website and make sure
your environment is ready.
 http://webassembly.org/getting-started/developers-guide/

7. Hello World in WebAssembly
 1. Write the C function you want to run in your browser.

8. Hello World in WebAssembly
 2. Compile your code.
You should now see the .js “glue”
code file generated by the compiler
and the .wasm binary file in your
directory after compiling.

9. Hello World in WebAssembly
 3. Write some HTML/JavaScript.

10. Hello World in WebAssembly
 4. Try it !
Demo

11. Present and future of WebAssembly
 More important features are being planned, such as threading support and
also the enhancement of the developers’ tools.
 Recently (2017), current WebAssembly adoption as a Web standard as
been growing and being supported by major industry players.
 https://blog.mozilla.org/blog/2017/11/13/webassembly-in-browsers/
 Safe to assume that adoption rate should increase in upcoming
months/years and make it a stable and efficient tool for Web programming.

12. Conclusion
 In conclusion, WebAssembly is :
 Modern binary format intended to run on the Web
 A tool to easily integrate C/C++ into your Web app.
 A growing Web standard.

13. Questions ?