Enforcing Patterns with TypeScript

Core Principle

strict: true is insufficient. Patterns without enforcement are just suggestions. TypeScript can enforce patterns at compile time.

Required tsconfig.json

{
  "compilerOptions": {
    "target": "ES2024",
    "module": "ESNext",
    "moduleResolution": "bundler",

    "strict": true,
    "noUncheckedIndexedAccess": true,
    "exactOptionalPropertyTypes": true,