tsconfig.json

{
  // All TS/JS files should be in src/
  "include": ["src/**/*"],

  "compilerOptions": {
    /* Projects */
    "incremental": true,                              /* Enable incremental compilation */
    "tsBuildInfoFile": "./tsconfig.tsbuildinfo",      /* Specify the folder for .tsbuildinfo incremental compilation files. */
    "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */

    /* Language and Environment */
    // Target of ES2022 to support private class fields using `#propertyName`
    "target": "ES2022",
    // Need DOM for RequestInit and fetch types
    "lib": ["ES2022", "DOM"],

    /* Modules */
    "rootDir": "./src",                               /* Specify the root folder within your source files. */
    // Difference between ES2015 (aka ES6) and ES2020, is that ES2020 adds support for dynamic imports, and import.meta.
    "module": "ES6",
    "moduleResolution": "node",

    /* Emit */
    "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
    "outDir": "./dist",                               /* Specify an output folder for all emitted files. */

    /* Interop Constraints */
    "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
    "forceConsistentCasingInFileNames": true,         /* Ensure that casing is correct in imports. */

    /* Type Checking */
    "strict": true,                                   /* Enable all strict type-checking options. */
    "noImplicitAny": true,                            /* Enable error reporting for expressions and declarations with an implied `any` type.. */
    "strictNullChecks": true,                         /* When type checking, take into account `null` and `undefined`. */
    "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
    "strictBindCallApply": true,                      /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */
    "strictPropertyInitialization": true,             /* Check for class properties that are declared but not set in the constructor. */
    "noImplicitThis": true,                           /* Enable error reporting when `this` is given the type `any`. */
    "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */
    "noUnusedLocals": true,                           /* Enable error reporting when a local variables aren't read. */
    "noUnusedParameters": true,                       /* Raise an error when a function parameter isn't read */
    "exactOptionalPropertyTypes": false,              /* Interpret optional property types as written, rather than adding 'undefined'. */
    "noImplicitReturns": true,                        /* Enable error reporting for codepaths that do not explicitly return in a function. */
    "noFallthroughCasesInSwitch": true,               /* Enable error reporting for fallthrough cases in switch statements. */
    "noUncheckedIndexedAccess": true,                 /* Include 'undefined' in index signature results */
    "noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
    "allowUnusedLabels": false,                       /* Disable error reporting for unused labels. */
    "useUnknownInCatchVariables": true,               /* Type catch clause variables as 'unknown' instead of 'any'. */
    "noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type */
  }
}