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TypeScript Reference for JS developers: Glossary of keywords, operators, statements and directives
https://welldan97.github.io/typescript-reference/
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TypeScript Reference for JS developers: Glossary of keywords, operators, statements and directives
Host: GitHub
URL: https://welldan97.github.io/typescript-reference/
Owner: welldan97
Created: 2022-08-24T20:29:58.000Z (over 2 years ago)
Default Branch: main
Last Pushed: 2022-09-26T19:22:49.000Z (over 2 years ago)
Last Synced: 2024-11-11T01:42:30.636Z (2 months ago)
Topics: javascript, react, reactjs, typescript
Language: SCSS
Homepage: https://welldan97.github.io/typescript-reference/
Size: 17.6 KB
Stars: 15
Watchers: 2
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
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awesome-typescript - TypeScript Reference for JS developers - Glossary of keywords, operators, statements and directives (Getting Started with (Awesome) TypeScript / Reference Lists)
README

        # TypeScript Reference for JS developers

Glossary of keywords, operators, statements and directives


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- [TypeScript Reference for JS developers

Glossary of keywords, operators, statements and directives
](#typescript-reference-for-js-developersglossary-of-keywords-operators-statements-and-directives)

  - [Statements](#statements)

  - [Built-in Type Primitives](#built-in-type-primitives)

  - [Complex Types](#complex-types)

  - [Type and Interface Properties](#type-and-interface-properties)

  - [Functions](#functions)

    - [Arguments](#arguments)

    - [Type Guards and Assertion Functions](#type-guards-and-assertion-functions)

    - [Overloads](#overloads)

  - [Type Manipulation](#type-manipulation)

    - [Basic](#basic)

    - [Extension](#extension)

    - [Mapped Types](#mapped-types)

  - [Generics](#generics)

    - [Constrains](#constrains)

  - [Classes](#classes)

    - [Properties](#properties)

    - [Properties present in JS](#properties-present-in-js)

    - [Constructor Parameter Properties](#constructor-parameter-properties)

    - [Extension](#extension-1)

    - [Decorators](#decorators)

  - [Utility Types](#utility-types)

  - [Comment Directives](#comment-directives)

    - [Enabling and Disabling Typescript](#enabling-and-disabling-typescript)

    - [References](#references)

Statements

----------

[`declare`](https://www.typescriptlang.org/docs/handbook/declaration-files/by-example.html), 

[`namespace`](https://www.typescriptlang.org/docs/handbook/namespaces.html)

Built-in Type Primitives

------------------------

[`boolean`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html), 

[`string`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html),

[`number`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html),

[`undefined`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html),

[`null`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html)

[`bigint`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html),

[`symbol`](https://www.typescriptlang.org/docs/handbook/symbols.html),

[`unique symbol`](https://www.typescriptlang.org/docs/handbook/symbols.html#unique-symbol)

[`any`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html),

[`unknown`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html),

[`never`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html),

[`void`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html)

Complex Types

-------------

[`|`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#union-types)

[`Array[]`](https://www.typescriptlang.org/docs/handbook/basic-types.html#array),

[`Tuple[]`](https://www.typescriptlang.org/docs/handbook/2/objects.html#tuple-types)

[`type`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#type-aliases),

[`interface`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#interfaces)

[`enum`](https://www.typescriptlang.org/docs/handbook/enums.html)

Type and Interface Properties

-----------------

{

  [`property?: Type`](https://www.typescriptlang.org/docs/handbook/2/objects.html#optional-properties)

  [`readonly property: Type`](https://www.typescriptlang.org/docs/handbook/2/objects.html#readonly-properties)

  [`(...args): Type`](https://www.typescriptlang.org/docs/handbook/2/functions.html#call-signatures)

  [`new(s: Type)`](https://www.typescriptlang.org/docs/handbook/2/functions.html#construct-signatures)

  [`[key: Type]: Type;`](https://www.typescriptlang.org/docs/handbook/2/objects.html#index-signatures)

}

Functions

---------

### Arguments

[`{ (this: Type): Type }`](https://www.typescriptlang.org/docs/handbook/2/functions.html#declaring-this-in-a-function)

[`{ (...args: Type[]): Type }`](https://www.typescriptlang.org/docs/handbook/2/functions.html#rest-parameters-and-arguments)

### Type Guards and Assertion Functions

[`is`](https://www.typescriptlang.org/docs/handbook/2/narrowing.html#using-type-predicates),

[`asserts condition`](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-7.html#assertion-functions),

[`asserts value is Type`](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-7.html#assertion-functions)

### Overloads

[overloads](https://www.typescriptlang.org/docs/handbook/2/functions.html#function-overloads)

Type Manipulation

-----------------

### Basic

[`!`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#non-null-assertion-operator-postfix-)

[`as`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#type-assertions)

[`as const`](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#literal-inference)

[`Type[key]`](https://www.typescriptlang.org/docs/handbook/2/indexed-access-types.html)

[`typeof`](https://www.typescriptlang.org/docs/handbook/2/typeof-types.html)

[`keyof`](https://www.typescriptlang.org/docs/handbook/2/keyof-types.html)

[`extends Type ? IfTrue : IfFalse`](https://www.typescriptlang.org/docs/handbook/2/conditional-types.html#inferring-within-conditional-types)

[`infer`](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-8.html#type-inference-in-conditional-types)

### Extension

[`&`](https://www.typescriptlang.org/docs/handbook/2/objects.html#intersection-types),

[`extends`](https://www.typescriptlang.org/docs/handbook/2/objects.html#extending-types),

[merging](https://www.typescriptlang.org/docs/handbook/declaration-merging.html#merging-interfaces)

### Mapped Types

{

  [`[Property in keyof Type]: Type;`](https://www.typescriptlang.org/docs/handbook/2/mapped-types.html)

  [`-readonly [Property in keyof Type]: Type[Property];`](https://www.typescriptlang.org/docs/handbook/2/mapped-types.html#mapping-modifiers)

  [`readonly [Property in keyof Type]: Type[Property];`](https://www.typescriptlang.org/docs/handbook/2/mapped-types.html#mapping-modifiers)

  [`[Property in keyof Type]-?: Type[Property];`](https://www.typescriptlang.org/docs/handbook/2/mapped-types.html#mapping-modifiers)

  [`[Property in keyof Type]?: Type[Property];`](https://www.typescriptlang.org/docs/handbook/2/mapped-types.html#mapping-modifiers)

  [`[Properties in keyof Type as NewKeyType]: Type[Properties]`](https://www.typescriptlang.org/docs/handbook/2/mapped-types.html#key-remapping-via-as)

}

Generics

--------

[`interface NewType`](https://www.typescriptlang.org/docs/handbook/2/objects.html#generic-object-types)

[`type NewType`](https://www.typescriptlang.org/docs/handbook/2/objects.html#generic-object-types)

[`{ (arg: Type): Type }`](https://www.typescriptlang.org/docs/handbook/2/generics.html#generic-types)

[`class Class`](https://www.typescriptlang.org/docs/handbook/2/generics.html#generic-classes)

### Constrains

[``](https://www.typescriptlang.org/docs/handbook/2/generics.html#generic-constraints)

Classes

-------

### Properties

{

  [`property?: Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#this-based-type-guards)

  [`property!: Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#fields)

  [`readonly property: Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#readonly)

  [`[key: Type]: Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#index-signatures)

  [`private property: Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#private)

  [`protected property: Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#protected)

  [`declare property: Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#type-only-field-declarations)

}

### Properties present in JS

{

  [`#property: Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#caveats)

  [`get property(): Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#getters--setters)

  [`set property(...args): Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#getters--setters)

  [`static property: Type`](https://www.typescriptlang.org/docs/handbook/2/classes.html#static-members)

  [`static {...}`](https://www.typescriptlang.org/docs/handbook/2/classes.html#static-blocks-in-classes)

}

### Constructor Parameter Properties

{

  [`constructor(parameter arg: Type)`](https://www.typescriptlang.org/docs/handbook/2/classes.html#parameter-properties)

}

### Extension

[`implements`](https://www.typescriptlang.org/docs/handbook/2/classes.html#class-heritage)

[`extends`](https://www.typescriptlang.org/docs/handbook/2/classes.html#extends-clauses)

[`abstract`](https://www.typescriptlang.org/docs/handbook/2/classes.html#abstract-classes-and-members)

### Decorators

[`@decorator class Class`](https://www.typescriptlang.org/docs/handbook/decorators.html#class-decorators) {

  [`@decorator() property`](https://www.typescriptlang.org/docs/handbook/decorators.html#property-decorators)

  [`@decorator method(...args) {...}`](https://www.typescriptlang.org/docs/handbook/decorators.html#method-decorators)

  [`method(@decorator arg: Type) {...}`](https://www.typescriptlang.org/docs/handbook/decorators.html#parameter-decorators)

  [`@decorator get accessor() {...}`](https://www.typescriptlang.org/docs/handbook/decorators.html#accessor-decorators)

  [`@decorator set accessor(value) {...}`](https://www.typescriptlang.org/docs/handbook/decorators.html#accessor-decorators)

}

Utility Types

-------------

[`Awaited`](https://www.typescriptlang.org/docs/handbook/utility-types.html#awaitedtype)

[`Partial`](https://www.typescriptlang.org/docs/handbook/utility-types.html#partialtype)

[`Required`](https://www.typescriptlang.org/docs/handbook/utility-types.html#requiredtype)

[`Readonly`](https://www.typescriptlang.org/docs/handbook/utility-types.html#readonlytype)

[`Record`](https://www.typescriptlang.org/docs/handbook/utility-types.html#recordkeys-type)

[`Pick`](https://www.typescriptlang.org/docs/handbook/utility-types.html#picktype-keys)

[`Omit`](https://www.typescriptlang.org/docs/handbook/utility-types.html#omittype-keys)

[`Exclude`](https://www.typescriptlang.org/docs/handbook/utility-types.html#excludeuniontype-excludedmembers)

[`Extract`](https://www.typescriptlang.org/docs/handbook/utility-types.html#extracttype-union)

[`NonNullable`](https://www.typescriptlang.org/docs/handbook/utility-types.html#nonnullabletype)

[`Parameters`](https://www.typescriptlang.org/docs/handbook/utility-types.html#parameterstype)

[`ConstructorParameters`](https://www.typescriptlang.org/docs/handbook/utility-types.html#constructorparameterstype)

[`ReturnType`](https://www.typescriptlang.org/docs/handbook/utility-types.html#returntypetype)

[`InstanceType`](https://www.typescriptlang.org/docs/handbook/utility-types.html#instancetypetype)

[`ThisParameterType`](https://www.typescriptlang.org/docs/handbook/utility-types.html#thisparametertypetype)

[`OmitThisParameter`](https://www.typescriptlang.org/docs/handbook/utility-types.html#omitthisparametertype)

[`ThisType`](https://www.typescriptlang.org/docs/handbook/utility-types.html#thistypetype)

[`Uppercase`](https://www.typescriptlang.org/docs/handbook/2/template-literal-types.html#uppercasestringtype)

[`Lowercase`](https://www.typescriptlang.org/docs/handbook/2/template-literal-types.html#lowercasestringtype)

[`Capitalize`](https://www.typescriptlang.org/docs/handbook/2/template-literal-types.html#capitalizestringtype)

[`Uncapitalize`](https://www.typescriptlang.org/docs/handbook/2/template-literal-types.html#uncapitalizestringtype)

Comment Directives

------------------

### Enabling and Disabling Typescript

[`// @ts-ignore`](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-6.html#suppress-errors-in-ts-files-using--ts-ignore-comments)

[`// @ts-check`](https://www.typescriptlang.org/docs/handbook/intro-to-js-ts.html#ts-check.html#suppress-errors-in-ts-files-using--ts-ignore-comments)

[`// @ts-nocheck`](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-7.html#-ts-nocheck-in-typescript-files)

[`// @ts-expect-error`](https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-9.html#-ts-expect-error-comments)

### References

[`/// `](https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html#-reference-path-)

[`/// `](https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html#-reference-types-)

[`/// `](https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html#-reference-lib-)

[`/// `](https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html#-reference-no-default-libtrue)

[`/// `](https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html#-amd-module-)

[`/// `](https://www.typescriptlang.org/docs/handbook/triple-slash-directives.html#-amd-dependency-)