strict
Also written: strict mode, "strict": true
A `tsconfig.json` option that turns on a family of checks, including `noImplicitAny`, `strictNullChecks`, `strictPropertyInitialization` and `useUnknownInCatchVariables`. It is the default in TypeScript 7.
Where the book teaches it
Related terms
noImplicitAnystrictNullChecksstrictPropertyInitializationcatch variable (error is unknown)