What is the process for converting TypeScript to JavaScript using Yarn?

What is the process of transpiling TypeScript code into JavaScript within a project using Yarn?

I require JavaScript code to execute it with alternative compilers like GraalVM and analyze its performance.

Answer №1

To implement this, include a build rule in your package.json.

{
  "name": "my-package",
  "scripts": {
    "build": "tsc -p .",
  }
}

Replace the . with the path to your tsconfig.json file which should have the following settings.

{
    "compilerOptions": {
      "target": "ES2019",                       /* Choose ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
      "module": "commonjs",                     /* Determine module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
       "outDir": "./dist",                      /* Specify output structure to the directory. */
      "strict": true,                           /* Activate all strict type-checking options. */
      "strictNullChecks": true,                 /* Enable strict null checks. */
      "esModuleInterop": true,                  /* Allow interoperability between CommonJS and ES Modules by creating namespace objects for imports. Implies 'allowSyntheticDefaultImports'. */
      "forceConsistentCasingInFileNames": true  /* Prohibit inconsistently-cased references to the same file. */
    }
}

Execute yarn run build.

The converted JavaScript files can be found in the ./dist folder.

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