tsconfig and strictness settings

Strict mode is a set of independent flags. Knowing what each one catches lets you adopt them incrementally on an existing codebase.

What this lesson covers

• Understand what each strict flag actually checks
• Turn on strictness incrementally in a legacy project
• Configure module resolution to match your runtime

This lesson sits in TypeScript in Practice, part of TypeScript for Application Developers. It assumes what came before it and leads directly into the next lesson in the module.