Encountering TS1204 error on version 1.5.0-beta with ES6 target, yet all functionalities are running smoothly

After successfully compiling everything from Typescript to ES6 to ES5, I encountered an error that has me stumped. The error message reads as follows:

Error TS1204: Cannot compile external modules into amd or commonjs when targeting es6 or higher.

Here is the setup details:

  • typescript 1.5.0-beta installed (npm install -g [email protected])
  • tsconfig.json file included below.
  • Two folders being used: src (contains all *.ts files) and typings (holds external library *.d.ts files).
  • Atom editor automatically populates "files" property in tsconfig.json.
  • ES6 files are transpiled to ES5 using Babel.

Contents of tsconfig.json file:

{
    "version": "1.5.0-beta",
    "compilerOptions": {
        "target": "es6",
        "module": "commonjs",
        "emitDecoratorMetadata": true,
        "declaration": false,
        "noImplicitAny": false,
        "removeComments": true,
        "noLib": false,
        "preserveConstEnums": true,
        "suppressImplicitAnyIndexErrors": true,
        "sourceMap": true,
        "outDir": "build"
    },
    "filesGlob": [
        "./src/**/*.ts",
        "./typings/**/*.ts",
        "!./node_modules/**/*"
    ],
    "files": [ redacted ]
}

Answer №1

The issue is clearly stated in the error message:

You cannot compile external modules into amd or commonjs when targeting es6 or higher.

Since ES6 comes with built-in modules, you should remove the following line from your tsconfig.json:

"module": "commonjs",

Instead, if you are compiling from ES6 to ES5 using babel, make sure to specify that it should compile to CommonJS:

 babel --modules common ...etc...

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