To get started with AssemblyScript, switch to a new directory and install the compiler from npm
$> npm install --save-dev assemblyscript
followed by scaffolding a new project, for example in the current directory:
$> npx asinit .
asinit command automatically creates the recommended directory structure and configuration files, including:
assembly/ directory containing the sources being compiled to WebAssembly, with a
tsconfig.json telling your editor about AssemblyScript's standard library along an exemplary
build/ directory where compiled WebAssembly binaries, source maps, definition files etc. become placed.
package.json with AssemblyScript as a development dependency and build tasks to compile both an untouched (as emitted by the AssemblyScript compiler) and an optimized (using Binaryen) version of your program in both binary and text format.
Afterwards, edit the sources in
assembly/, maybe tweak the build steps in
package.json to fit your needs, and run
npm run asbuild to compile your program to WebAssembly.
Using the exemplary
index.js in the root directory of your package you'll then be able to
requirethe WebAssembly module just like any other node module, with the notable difference that the only values your module's exports understand being integers and floats. That's of course not the end of the story. In fact, we're just getting started.