Create an Accurate Model of Your Environment

Overview

Your TypeScript environment includes globals, environment variables, and platform-specific APIs. Create accurate type definitions for your environment using declaration files (.d.ts). This ensures type safety for platform-specific code and global variables.

When to Use This Skill

• Defining global types
• Augmenting window or globalThis
• Typing environment variables
• Working with build-time constants
• Configuring type definitions

The Iron Rule

Model your environment accurately with .d.ts files. Declare globals, window properties, and environment variables that your code depends on.

Example