tsconfig.json

{
    // see https://www.typescriptlang.org/tsconfig to better understand tsconfigs
    "include": [
        "src",
        "types",
        "src/components",
        "src/custom.d.ts"
    ],
    "compilerOptions": {
        "module": "esnext",
        "lib": [
            "dom",
            "esnext"
        ],
        "importHelpers": true,
        // output .d.ts declaration files for consumers
        "declaration": true,
        // output .js.map sourcemap files for consumers
        "sourceMap": true,
        // match output dir to input dir. e.g. dist/index instead of dist/src/index
        "rootDir": "./src",
        // stricter type-checking for stronger correctness. Recommended by TS
        "strict": true,
        // linter checks for common issues
        "noImplicitReturns": true,
        "noFallthroughCasesInSwitch": true,
        // noUnused* overlap with @typescript-eslint/no-unused-vars, can disable if duplicative
        "noUnusedLocals": true,
        "noUnusedParameters": true,
        // use Node's module resolution algorithm, instead of the legacy TS one
        "moduleResolution": "node",
        // transpile JSX to React.createElement
        "jsx": "react",
        // interop between ESM and CJS modules. Recommended by TS
        "esModuleInterop": true,
        // significant perf increase by skipping checking .d.ts files, particularly those in node_modules. Recommended by TS
        "skipLibCheck": true,
        // error out if import and file system have a casing mismatch. Recommended by TS
        "forceConsistentCasingInFileNames": true,
        // `tsdx build` ignores this option, but it is commonly used when type-checking separately with `tsc`
        "noEmit": true
    }
}