tsconfig.json

{
  "compilerOptions": {
    "target": "ESNext",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "module": "ESNext",                                /* Specify what module code is generated. */
    "rootDir": "./src",                                  /* Specify the root folder within your source files. */
    // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
    "outDir": "./build",                                   /* Specify an output folder for all emitted files. */
    "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'. */
    "useUnknownInCatchVariables": true,               /* Default catch clause variables as 'unknown' instead of 'any'. */
    "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */
    "exactOptionalPropertyTypes": true,               /* 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. */
    "noImplicitOverride": true,                       /* Ensure overriding members in derived classes are marked with an override modifier. */
  }
}