Typescript scripts

[Voxar]

Hi there!

We are looking around for typed scripting languages to run on our devices.

I experimented a bit with typescript and running it through tsc before microvium, but I'm not very experineces around js/ts/node etc so I'm not sure how to handle for example vmImport and vmExport.

Is there some magic ready to use or do you have throughts to share on how one could (or if one even should) approach a .ts -> .mvm-bc build flow?

Thanks.

[coder-mike]

Hi @Voxar

For TypeScript, you should be able to create a global.d.ts file with the following:

declare function vmExport(id: number, handler: Function): void;
declare function vmImport(id: number): Function;

This just tells TSC that these functions exist, so you don't get type errors when accessing them.

Something else to be aware of is that Microvium doesn't support commonjs, so your tsconfig should probably have a modern target and module field, such as ES2023 or ESNext, to avoid tsc rewriting the module imports to common.js.

Just for reference, in a Microvium project where I used TypeScript, I had something like the following scripts in package.json:

  "scripts": {
    "build": "npm run build:typescript && npm run build:microvium",
    "build:typescript": "tsc",
    "build:microvium": "microvium build/ts-output/main.js --snapshot build/app.mvm-bc --output-disassembly build/app.map
  },

and my tsconfig.json had "outDir": "./build/ts-output"

Let me know how this goes. What's the project you're working on?