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I'm creating a project which uses SystemJS/JSPM. I'm also using TypeScript.

Now TypeScript has the option of compiling JS using SystemJS Modules - which I'm doing and all is good. I've created TS modules and then imported modules from JSPM - at which point TS uses SystemJS to import those modules in Javascript.

Where I get confused is why SystemJS then also has the option of using TypeScript and/or Babel as a Transpiler.

Are there ready made JSPM/NPM modules out there that come in Typescript form or ES6 form that SystemJS would then use one of these Transpilers to build Javascript / or transpile down to ES5?

Or am I missing something entirely here?

As a side note there's no systemjs tag or transpiler tag on programmers exchange.

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  • Many packages include multiple distribution formats as well as their source code, using the transpiler option allows you to process these directly (in most cases). There are a variety of reasons you would do this including allowing the systemjs-builder to apply advanced rollup optimizations for production bundling or to work directly with the source, say for debugging purposes, during development. I have done this with the ESRI-Leaflet packages. Good point about the need for a systemjs tag. Commented Mar 11, 2017 at 17:11

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