Generating asm.js Using Emscripten

We’ll use Emscripten to port C/C++ programs into asm.js or the WebAssembly binary and then run them inside the JavaScript engine.

Note: Programming languages such as Lua and Python have a C/C++ runtime. With Emscripten, we can port the runtime as a WebAssembly module and execute them inside the JavaScript engine. This makes it easy to run Lua/Python code on the JavaScript engine. Thus, Emscripten and WebAssembly allow the running of native code in the JavaScript engine.

First, let’s create a sum.cpp file: