TypeScript

What is TypeScript?

TypeScript is a superset of JavaScript developed by Microsoft that adds static type checking. TypeScript code is compiled to standard JavaScript and runs everywhere JavaScript runs. It is used by Google (Angular), Slack, Airbnb and an increasing number of teams who want to write more reliable code.

Why TypeScript is useful

Types catch errors before your code runs — that saves hours of debugging:

• Compile-time error detection: Catch bugs before they reach production
• Better IDE support: Autocompletion, refactoring and navigation in every editor
• Self-documenting: Types serve as living documentation of your codebase
• Gradual adoption: Start with JavaScript and add types where it's useful

Time savings with TypeScript

TypeScript drastically reduces debugging time. Errors that would otherwise only surface in production are shown directly in your editor.

Hidden features that often go unused

TypeScript has advanced type features that are exceptionally powerful:

• Mapped Types: Automatically transform existing types into new variants.
• Conditional Types: Types that change based on conditions — programmable types.
• Template Literal Types: Type checking on string patterns and URL routes.
• Discriminated Unions: Pattern matching with exhaustiveness checking.
• Module Augmentation: Extend existing type definitions without modifying the source code.
• satisfies Operator: Validate types without losing type narrowing.

Integrations with other tools

TypeScript integrates with many other tools and services:

• React & Angular: TypeScript is the standard for modern frontend frameworks.
• Node.js: Type-safe backend development with Express, Fastify or NestJS.
• GraphQL: Automatic type generation from GraphQL schemas.