tsconfig.json

{
    // NEW: Options for file/directory watching
    "watchOptions": {
        // Use native file system events for files and directories
        "watchFile": "useFsEvents",
        "watchDirectory": "useFsEvents",
        // Poll files for updates more frequently
        // when they're updated a lot.
        "fallbackPolling": "dynamicPriority"
    },
    "compilerOptions": {
        // Emitting .d.ts files is generally a good practice: it's required for all
        // library code, and we tend to break our applications into multiple
        // (composite) compilation units, too.
        "declaration": true,
        // Emits a source map for each declaration map, allowing tooling to better
        // follow our compiled output.
        "declarationMap": true,
        // typeorm makes extensive use of decorators.
        "emitDecoratorMetadata": true,
        // Provides more natural imports of CommonJS modules; and uses different
        // helper methods (via tslib).
        "esModuleInterop": true,
        // We like decorators, and are willing to take on pain due to the decorator
        // spec being in flux.
        "experimentalDecorators": true,
        // Consistent casing is cleaner and allows for development between
        // operating systems.
        "forceConsistentCasingInFileNames": true,
        // By consistently importing tslib across our projects, we can pretty
        // dramatically cut down on the size of compiled code.
        "importHelpers": true,
        // Ensure that all builds generate and consume incremental build info.
        "incremental": true,
        // Emit source maps so that debug tooling can trace back to original code.
        //
        // TODO: Switch back to sourceMap when we can. For now, inlineSourceMap
        // seems to have better tooling support. Inverting these appears to break:
        // vs.code breakpoints in TS, raven-sentry source maps.
        "inlineSourceMap": true,
        "lib": [
            // Native Node 10 functionality.
            "es2016",
            "es2017",
            "es2018",
            "esnext.bigint",
            "esnext.intl",
            // TypeScript downlevels async iterators for us.
            "esnext.asynciterable",
            // This is arguable, but nearly all of our projects rely on it, and
            // TypeScript does not support merging `lib` lists when extending.
            "dom"
        ],
        // Node 10 doesn't support ES modules.
        "module": "commonjs",
        // Infer shapes of JSON modules from their source.
        "resolveJsonModule": true,
        // Node 10 supports all ES2018 syntatic features.
        "target": "es2018",
        /**
         * Style options enforced by the compiler.
         */
        // Our projects assume a *nix environment.
        "newLine": "lf",
        // Always include a `break` in each `case`.
        "noFallthroughCasesInSwitch": true,
        // If you want to use `any`, be explicit about it.
        "noImplicitAny": true,
        // Helps catch cases where we forgot to return something.
        "noImplicitReturns": true,
        // Helps catch ambiguous callbacks.
        "noImplicitThis": true,
        // Clean up your dead code!
        "noUnusedLocals": true,
        // Clean up your dead API! (or prefix with _ to indicate a placholder).
        "noUnusedParameters": true,
        // Enable all of TypeScript's strict checks.
        "strict": true
    }
}