tsconfig.json

{
    "compileOnSave": true,
    "compilerOptions": {

        // --- output --- //
        
        "declaration": false,
        "outDir": "./dist",
        "sourceMap": true,
        "target": "es5",
        "module": "es2015",
        "removeComments": true,
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        
        // --- module resolution --- //

        "typeRoots" : ["./node_modules/@types","./@types"],
        "moduleResolution": "node",
        "baseUrl": ".",

        // --- validation options --- //

        "alwaysStrict": true,
        "allowSyntheticDefaultImports": false,
        "allowUnreachableCode": false,
        "forceConsistentCasingInFileNames": true,
        "lib": ["dom", "es2017"],
        "noImplicitAny": true,
        "noImplicitReturns": true,
        "noImplicitThis": true,
        "noFallthroughCasesInSwitch": true,
        "noUnusedLocals": true,
        "noUnusedParameters": false,
        "skipLibCheck": true,
        "strictNullChecks": false
    }
}