cpp-wasm-loader | C/C++ to WASM Webpack Loader

ASM.JS is specifically formatted javascript code that runs quite a bit faster than normal javascript. Since it's just plain javascript it's supported by just about every browser with newer browsers supporting a special compilation with a performance boost. When you pass asmJs into the webpack config object an ASMJS version of your native code will be bundled with the javascript. If Webassembly support isn't detected the ASMJS code will be loaded instead, allowing your native code to work on anything back to Internet Explorer 10. As of current (Q4 2018) caniuse.com stats, including ASMJS support moves your code from 75% global browser support to 95%. IE9 isn't supported because it lacks Typed Arrays, if you bundle a Typed Array PolyFill you can even get support in IE9. The only difference between loading ASMJS and Webassembly code is the module variable returned from the promise doesn't include some webassembly specific objects. Speficially module.raw and module.table will be undefined when loading ASMJS instead of Webassembly. ASMJS will also run considerably slower than Webassembly. Note: ASMJS code will only be bundled when webpack is compiling in production mode. Note 2: If you plan to support older browsers (any Internet Explorer version) make sure you bundle a Promise polyfill. lie-ts works and is only 1.2KB.