What are the differences between type-checking tools?

What are the main differences between TypeScript and Flow?

TypeScript is a superset of JavaScript that adds static types, while Flow is a static type checker for JavaScript. TypeScript has a more extensive ecosystem and better integration with editors.

Can you explain how type inference works in these tools?

Type inference in TypeScript allows the compiler to automatically deduce types based on the assigned values. Flow also supports type inference but may require more explicit type annotations in some cases.

Which tool is better for large-scale applications?

TypeScript is generally preferred for large-scale applications due to its strong community support, extensive tooling, and better integration with modern frameworks.

Are there any performance differences between them?

In terms of runtime performance, both TypeScript and Flow compile to plain JavaScript, so there’s no significant difference. However, TypeScript's type-checking can lead to fewer runtime errors.