Web Development Intermediate

What is TypeScript?

A typed superset of JavaScript that adds static type checking, interfaces, and advanced IDE support to JavaScript development.

TypeScript adds type annotations to JavaScript: function greet(name: string): string. The compiler catches type errors before runtime, preventing common bugs. TypeScript compiles to plain JavaScript, running everywhere JavaScript runs.

Features include interfaces, generics, enums, union types, type guards, and declaration files (.d.ts) for typing external libraries. TypeScript is used by Angular, many React projects, Deno, and most large-scale JavaScript codebases. It significantly improves developer productivity and code quality.

Learn More About This Topic

TypeScript for Backend Developer

Directly covers this topic

TypeScript Design Patterns

Directly covers this topic

TypeScript Fundamentals

Directly covers this topic

Related Terms

HTTP Status Codes

Standardized three-digit codes returned by web servers to indicate the result of a client's HTTP request.

A widely-used server-side scripting language designed for web development that powers over 75% of websites including WordPress.

A high-performance RPC framework using Protocol Buffers and HTTP/2 for efficient service-to-service communication.

Google's metrics for measuring user experience quality, including loading speed, interactivity, and visual stability of web pages.

An automatic OPTIONS request sent by browsers before certain cross-origin requests to check if the actual request is permitted.

API Rate Limiting

A strategy for limiting the number of API requests a client can make within a specified time window to protect server resources.

View All Web Development Terms →