Configuration and Best Practices

A well-configured TypeScript project is easier to maintain, produces fewer bugs, and provides a better developer experience. This lesson covers the tsconfig.json file in depth, recommended compiler options, linting with ESLint, declaration files, and strategies for migrating JavaScript projects to TypeScript.

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tsconfig.json

The tsconfig.json file is the heart of every TypeScript project. It tells the compiler which files to include, what JavaScript version to target, and how strictly to check your code.

Generate a starter config with:

// npx tsc --init

Key Compiler Options

strict

The strict flag enables a family of strict type-checking options:

// tsconfig.json
// {
//   "compilerOptions": {
//     "strict": true
//   }
// }