| Version number
|
Release date
|
Significant changes
|
| 0.8
|
1 October 2012( )
|
|
| 0.9
|
18 June 2013( )
|
|
| 1.0
|
12 April 2014( )
|
|
| 1.1
|
6 October 2014
( )
|
performance improvements
|
| 1.3
|
12 November 2014( )
|
protected modifier, tuple types
|
| 1.4
|
20 January 2015( )
|
union types, let and const declarations, template strings, type guards, type aliases
|
| 1.5
|
20 July 2015( )
|
ES6 modules, namespace keyword, for..of support, decorators
|
| 1.6
|
16 September 2015( )
|
JSX support, intersection types, local type declarations, abstract classes and methods, user-defined type guard functions
|
| 1.7
|
30 November 2015( )
|
async and await support,
|
| 1.8
|
22 February 2016( )
|
constraints generics, control flow analysis errors, string literal types, allowJs
|
| 2.0
|
22 September 2016( )
|
null- and undefined-aware types, control flow based type analysis, discriminated union types, never type, readonly keyword, type of this for functions
|
| 2.1
|
8 November 2016( )
|
keyof and lookup types, mapped types, object spread and rest,
|
| 2.2
|
22 February 2017( )
|
mix-in classes, object type,
|
| 2.3
|
27 April 2017( )
|
async iteration, generic parameter defaults, strict option
|
| 2.4
|
27 June 2017( )
|
dynamic import expressions, string enums, improved inference for generics, strict contravariance for callback parameters
|
| 2.5
|
31 August 2017( )
|
optional catch clause variables
|
| 2.6
|
31 October 2017( )
|
strict function types
|
| 2.7
|
31 January 2018( )
|
constant-named properties, fixed length tuples
|
| 2.8
|
27 March 2018( )
|
conditional types, improved keyof with intersection types
|
| 2.9
|
14 May 2018
( )
|
support for symbols and numeric literals in keyof and mapped object types
|
| 3.0
|
30 July 2018( )
|
project references, extracting and spreading parameter lists with tuples
|
| 3.1
|
27 September 2018( )
|
mappable tuple and array types
|
| 3.2
|
30 November 2018( )
|
stricter checking for bind, call, and apply
|
| 3.3
|
31 January 2019( )
|
relaxed rules on methods of union types, incremental builds for composite projects
|
| 3.4
|
29 March 2019( )
|
faster incremental builds, type inference from generic functions, readonly modifier for arrays, const assertions, type-checking global this
|
| 3.5
|
29 May 2019( )
|
faster incremental builds, omit helper type, improved excess property checks in union types, smarter union type checking
|
| 3.6
|
28 August 2019( )
|
Stricter generators, more accurate array spread, better unicode support for identifiers
|
| 3.7
|
5 November 2019( )
|
Optional Chaining, Nullish Coalescing
|
| 3.8
|
20 February 2020( )
|
Type-only imports and exports, ECMAScript private fields, top-level await
|
| 3.9
|
12 May 2020( )
|
Improvements in Inference, Speed Improvements
|
| 4.0
|
20 August 2020( )
|
Variadic Tuple Types, Labeled Tuple Elements
|
| 4.1
|
19 November 2020( )
|
Template Literal Types, Key Remapping in Mapped Types, Recursive Conditional Types
|
| 4.2
|
25 February 2021( )
|
Smarter Type Alias Preservation, Leading/Middle Rest Elements in Tuple Types, Stricter Checks For The in Operator, abstract Construct Signatures
|
| 4.3
|
26 May 2021( )
|
Separate Write Types on Properties, override and the --noImplicitOverride Flag, Template String Type Improvements
|
| 4.4
|
26 August 2021( )
|
Control Flow Analysis of Aliased Conditions and Discriminants, Symbol and Template String Pattern Index Signatures
|
| 4.5
|
17 November 2021
( )
|
Type and Promise Improvements, Supporting lib from node_modules, Template String Types as Discriminants, and es2022 module
|
| 4.6
|
28 February 2022( )
|
See TypeScript 4.6 Microsoft release announcement [1]
|
| 4.7
|
24 May 2022( )
|
See TypeScript 4.7 Microsoft release announcement [2]
|
| 4.8
|
25 August 2022( )
|
See TypeScript 4.8 Microsoft release announcement [3]
|
