---
id: kb-2026-00022
title: TypeScript
schema_type: TechArticle
category: computer-science
language: en
confidence: medium
last_verified: "2026-05-28"
created_date: "2026-05-22"
generation_method: ai_structured
conflict_of_interest: none_declared
is_live_document: false
data_period: static
atomic_facts:
  - id: fact-typescript-1
    statement: TypeScript is JavaScript with syntax for types and converts TypeScript code into JavaScript.
    source_title: TypeScript for JavaScript Programmers
    source_url: https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html
    confidence: medium
  - id: fact-typescript-2
    statement: >-
      The TypeScript handbook describes everyday types such as string, number, boolean, arrays, and
      object types.
    source_title: "TypeScript Handbook: Everyday Types"
    source_url: https://www.typescriptlang.org/docs/handbook/2/everyday-types.html
    confidence: medium
  - id: fact-typescript-3
    statement: >-
      Microsoft maintains the TypeScript language and compiler in the public TypeScript GitHub
      repository.
    source_title: TypeScript GitHub Repository
    source_url: https://github.com/microsoft/TypeScript
    confidence: medium
completeness: 0.86
known_gaps:
  - This compact repair keeps only source-mapped public claims from the sampled audit entry.
disputed_statements: []
primary_sources:
  - title: TypeScript for JavaScript Programmers
    type: documentation
    year: 2026
    url: https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html
    institution: TypeScript
  - title: "TypeScript Handbook: Everyday Types"
    type: documentation
    year: 2026
    url: https://www.typescriptlang.org/docs/handbook/2/everyday-types.html
    institution: TypeScript
  - title: TypeScript GitHub Repository
    type: repository
    year: 2026
    url: https://github.com/microsoft/TypeScript
    institution: Microsoft
secondary_sources: []
updated: "2026-05-28"
---

## TL;DR

TypeScript adds type syntax to JavaScript and converts TypeScript source into JavaScript for execution.

## Core Explanation

This repair removes survey popularity claims, empty URLs, and unsupported future sources. The remaining public facts map to TypeScript documentation and Microsoft's TypeScript repository.

## Further Reading

- [TypeScript for JavaScript Programmers](https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html)
- [TypeScript Handbook: Everyday Types](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html)
- [TypeScript GitHub Repository](https://github.com/microsoft/TypeScript)