Force TypeScript to be compiled in commonjs module when targeting ES6

[WangJi]

Hereis the scenario:

I'm using TS to write Node application. Since the newer Node version(4.x) now supports most ES6 features, I set tsconfig.json to be like this:

{
    "compilerOptions": {
        "target": "ES6"
    }
}

However, after compiled, these js files can not run in Node because import is still a reserved word and not supported by Node yet.
After I alter tsconfig.json to:

{
    "compilerOptions": {
        "target": "ES6",
        "module": "commonjs"
    }
}

then I get a compile error:

Cannot compile modules into 'commonjs', 'amd', 'system' or 'umd' when targeting 'ES6' or higher.

So I got stuck here: If I want to use es6 features such as generator,for of, I have to set compile target to es6, but if I do so, both ts and js files would have to be import and export in es6 way, which is not currently supported by Node.

For now, I'm using Babel to convert es6 files to es5. However, it seems too heavy, babel does a lot of polyfill work and the final generated codes are hard for human to read.

So I'm asking if there is some better way of doing this: benefit from writing ts in es6 syntax while directly compile code to js that Node.js can run.

[kitsonk]

Dupe of #4389 which is in master.

[WangJi]

@kitsonk Thank you .
install typescript@next solve my issue.

[rudijs]

@WangJi Thank you too.

Google search for "typescript generators es5" lead me here, the install typescript@next sorts me too.