All Visualizers

TypeScript Visualizer

Deep-dive into the type system internals, compiler pipeline, generics, and real-world advanced patterns

Type System Basics

Explore how TypeScript's structural type system works — from inference and widening to unions, intersections, and literal types.

1
2
3
4
5

1. Define Two Interfaces

interface Point2D {
  x: number;
  y: number;
}

interface Coordinate {
  x: number;
  y: number;
}

Structural Type Compatibility Visualized

Point2D

x: number

y: number

≡

Coordinate

x: number

y: number