Typescript generates typescript instead of javascript

Question

So I wanted to start rewriting my code from Screeps using Typescript. But for some reason instead of generating a Javascript code, it generates the same typescript code. Am I missing something from tsconfig.json file?

Left Typescript, right suppose to be Javascript

tsconfig.json File

{
  "compileOnSave": true,
  "compilerOptions": {
    "module": "es2015",
    "lib": [ "esnext" ],
    "target": "es2015",
    "moduleResolution": "Node",
    "outDir": "../",
    "baseUrl": "src/",
    "sourceMap": true,
    "strict": true,
    "experimentalDecorators": true,
    "noImplicitReturns": true,
    "allowSyntheticDefaultImports": true,
    "allowUnreachableCode": false,
    "noImplicitAny": false,
    "noEmitOnError": true,
    "removeComments": false
  },
  "exclude": [
    "node_modules"
  ]
}

Maybe I am missing from this file, I am new to typescript. Using Visual Studio 2017 Community.

The right pane looks like correct Javascript to me...? What part of it is invalid as Javascript? — Felix Guo
– Felix Guo, Commented Aug 3, 2018 at 23:11
Because I expected the class to be converted to a function, similar to this video: youtu.be/yn1IScE-TQQ?t=4m17s — Raul Junc
– Raul Junc, Commented Aug 3, 2018 at 23:21
Yes, that's correct after I changed to ES5 that generated the output that I expected, thank you for the help. — Raul Junc
– Raul Junc, Commented Aug 3, 2018 at 23:26

Ryan Cavanaugh · Accepted Answer · 2018-08-03 23:22:20Z

3

The output is JavaScript, compliant with ES6 (also known as ES2015). export, const, class, etc are all legal JavaScript.

If you want to generate code to run on old browsers, change target to es5 or es3

answered Aug 3, 2018 at 23:22

Ryan Cavanaugh

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1 Comment

Raul Junc Over a year ago

Great, setting target to es5 solved the problem for me, thank you.

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