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TypeScriptWorking with JavaScript & Type Declarations

39 items

1

Automatic Type Acquisition

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2

Typing the global Object

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3

@ts-check and @ts-nocheck

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@ts-ignore vs @ts-expect-error

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5

Purpose of Declaration Files

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6

The declare Keyword

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7

Ambient Variable and Function Declarations

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8

Installing @types Packages

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9

Declaring Untyped Modules

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Gradual JS to TS Migration

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declare namespace Usage

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@param and @type Precision

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13

JSDoc Type Annotations

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14

UMD Global Declaration Syntax

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15

JSDoc @type Annotation

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JSDoc @param and @returns

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17

Implicit any from JS Import

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Overloaded Signatures in .d.ts

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declare namespace Members

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Ambient const enum

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21

Ambient Class Shape

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Ambient Variable with declare

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23

Ambient Function Signature

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24

Value Inside a .d.ts File

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25

Triple-Slash Reference Syntax

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26

Installing @types Packages

Code Quiz
27

Ambient Global Variables

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28

Ambient Functions

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29

JSDoc for Typing JavaScript

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30

@ts-ignore vs @ts-expect-error

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31

Triple-Slash Directives

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32

The declare Keyword

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33

@ts-check and @ts-nocheck

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Global Augmentation with declare global

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35

Gradual JS to TS Migration

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36

Structure of an @types Package

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37

Wildcard Module Declarations

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38

Handling Implicit any

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39

Installing @types Packages

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FlashcardIntermediate

Installing @types Packages

Learn how to add community type definitions from DefinitelyTyped for untyped JavaScript libraries.

Question

How do you add TypeScript types for a JS library that ships no types of its own?

Click to reveal answer