6: tsconfig.json

{
    "extends": "../tsconfig.json",
    "compilerOptions": {
        /* Visit https://aka.ms/tsconfig.json to read more about this file */

        /* Basic Options */
        // "incremental": true,                         /* Enable incremental compilation */
        "target": "es5" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */,
        "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
        // "lib": [],                                   /* Specify library files to be included in the compilation. */
        // "allowJs": true,                             /* Allow javascript files to be compiled. */
        // "checkJs": true,                             /* Report errors in .js files. */
        // "jsx": "preserve",                           /* Specify JSX code generation: 'preserve', 'react-native', 'react', 'react-jsx' or 'react-jsxdev'. */
        // "declaration": true,                         /* Generates corresponding '.d.ts' file. */
        // "declarationMap": true,                      /* Generates a sourcemap for each corresponding '.d.ts' file. */
        // "sourceMap": true,                           /* Generates corresponding '.map' file. */
        // "outFile": "./",                             /* Concatenate and emit output to single file. */
        "outDir": "./build" /* Redirect output structure to the directory. */,
        "rootDir": "./src" /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,
        "composite": true /* Enable project compilation */,
        // "tsBuildInfoFile": "./",                     /* Specify file to store incremental compilation information */
        // "removeComments": true,                      /* Do not emit comments to output. */
        // "noEmit": true /* Do not emit outputs. */,
        // "importHelpers": true,                       /* Import emit helpers from 'tslib'. */
        // "downlevelIteration": true,                  /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
        "isolatedModules": true /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */,

        /* Strict Type-Checking Options */
        "strict": true /* Enable all strict type-checking options. */,
        "noImplicitAny": true /* Raise error on expressions and declarations with an implied 'any' type. */,
        // "strictNullChecks": true,                    /* Enable strict null checks. */
        // "strictFunctionTypes": true,                 /* Enable strict checking of function types. */
        // "strictBindCallApply": true,                 /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
        // "strictPropertyInitialization": true,        /* Enable strict checking of property initialization in classes. */
        "noImplicitThis": true /* Raise error on 'this' expressions with an implied 'any' type. */,
        // "alwaysStrict": true,                        /* Parse in strict mode and emit "use strict" for each source file. */

        /* Additional Checks */
        // "noUnusedLocals": true,                      /* Report errors on unused locals. */
        // "noUnusedParameters": true,                  /* Report errors on unused parameters. */
        // "noImplicitReturns": true,                   /* Report error when not all code paths in function return a value. */
        // "noFallthroughCasesInSwitch": true,          /* Report errors for fallthrough cases in switch statement. */
        // "noUncheckedIndexedAccess": true,            /* Include 'undefined' in index signature results */
        // "noPropertyAccessFromIndexSignature": true,  /* Require undeclared properties from index signatures to use element accesses. */

        /* Module Resolution Options */
        // "moduleResolution": "node",                  /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
        "baseUrl": "./" /* Base directory to resolve non-absolute module names. */,
        // "paths": {},                                 /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
        "rootDirs": [
            "src",
            "build"
        ] /* List of root folders whose combined content represents the structure of the project at runtime. */,
        "typeRoots": ["node_modules/@types"] /* List of folders to include type definitions from. */,
        // "types": [],                                 /* Type declaration files to be included in compilation. */
        // "allowSyntheticDefaultImports": true,        /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
        "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
        // "preserveSymlinks": true,                    /* Do not resolve the real path of symlinks. */
        // "allowUmdGlobalAccess": true,                /* Allow accessing UMD globals from modules. */

        /* Source Map Options */
        // "sourceRoot": "",                            /* Specify the location where debugger should locate TypeScript files instead of source locations. */
        // "mapRoot": "",                               /* Specify the location where debugger should locate map files instead of generated locations. */
        // "inlineSourceMap": true,                     /* Emit a single file with source maps instead of having a separate file. */
        // "inlineSources": true,                       /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */

        /* Experimental Options */
        // "experimentalDecorators": true,              /* Enables experimental support for ES7 decorators. */
        // "emitDecoratorMetadata": true,               /* Enables experimental support for emitting type metadata for decorators. */

        /* Advanced Options */
        "skipLibCheck": true /* Skip type checking of declaration files. */,
        "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
    },
    "include": ["./src/**/*.ts"],
    "exclude": ["./node_modules", "./build"]
}