tsconfig.json

{
    "compilerOptions": {
        "target": "ES2020",

        // previously "CommonJS", we now use "ES2015" to transpile TypeScript to "export default"
        // instead of "exports.default ="
        "module": "ES2020",

        "esModuleInterop": true,

        // From what I understand while reading the docs "classic" was introduced first and "classic" is by
        // default(except when "module": "commonjs") because of backwards compatibility.
        //
        // From the docs: "node module resolution is the most-commonly used in the TypeScript community and is
        // recommended for most projects."
        "moduleResolution": "node",

        // the npm package include ".js" files only so we need ".d.ts" files to be generated
        "declaration": true,

        // - ℹ️ https://www.typescriptlang.org/tsconfig#isolatedModules
        // - 😃 Deno requires "isolatedModules" to be set to `true`
        // - 😃 the stricter version - I always prefer the stricter version
        // - 😃 probably the future
        "isolatedModules": true,

        // strict options ensuring more stable code
        "strict": true,
        "noUnusedLocals": true,
        "noUnusedParameters": true,
        "allowUnreachableCode": false,
        "noUncheckedIndexedAccess": true,
        "noFallthroughCasesInSwitch": true,
        "exactOptionalPropertyTypes": true,
        "forceConsistentCasingInFileNames": true
    },
    "include": ["index.ts"]
}