Automatic Type Acquisition

Typing the global Object

@ts-check and @ts-nocheck

@ts-ignore vs @ts-expect-error

Purpose of Declaration Files

The declare Keyword

Ambient Variable and Function Declarations

Installing @types Packages

Declaring Untyped Modules

Gradual JS to TS Migration

declare namespace Usage

@param and @type Precision

JSDoc Type Annotations

UMD Global Declaration Syntax

JSDoc @type Annotation

JSDoc @param and @returns

Implicit any from JS Import

Overloaded Signatures in .d.ts

declare namespace Members

Ambient const enum

Ambient Class Shape

Ambient Variable with declare

Ambient Function Signature

Value Inside a .d.ts File

Triple-Slash Reference Syntax

Installing @types Packages

Ambient Global Variables

Ambient Functions

JSDoc for Typing JavaScript

@ts-ignore vs @ts-expect-error

Triple-Slash Directives

The declare Keyword

@ts-check and @ts-nocheck

Global Augmentation with declare global

Gradual JS to TS Migration

Structure of an @types Package

Wildcard Module Declarations

Handling Implicit any

Installing @types Packages