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Return to TypeScript, Version History, Versions, TypeScript Topics, TypeScript DevOps, JavaScript Versions, Angular Versions, React.js Versions

TypeScript, created and maintained by Microsoft, is a superset of JavaScript that introduces optional static types, helping developers catch potential errors at compile-time rather than runtime. Since its introduction in 2012, TypeScript has grown in popularity due to its powerful tooling and ability to scale for large projects. Below is a detailed version history of TypeScript, highlighting key features, improvements, and changes for each major release.

TypeScript 5.3 is expected to bring incremental improvements focusing on performance optimizations and expanding type system features. While the release details are still being finalized, potential updates include more granular control over type checking and expanded support for ECMAScript features.

Expected URLs:

• TypeScript 5.3: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-5-3.html

TypeScript 5.2 focused on expanding the type system and improving the experience for developers working with large-scale projects.

Key features:

• Enums as Union Types: TypeScript now treats `enum` members as if they are union types, enabling better type inference when working with enums.
• Improved Completion for Import Statements: Enhanced IntelliSense support for more accurate suggestions in import statements.
• auto-import in JSDoc Types: Automatically suggest imports for types referenced in JSDoc comments, simplifying code maintenance.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-5-2.html

TypeScript 5.1 introduced several enhancements to the type system and further streamlined syntax for certain patterns.

Key features:

• Decoupled Functions and Object Types: More flexible handling of functions and object types.
• Easier Implicit Returns for Async Functions: Allow `async` functions to infer `void` return types when no return value is expected.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-5-1.html

TypeScript 5.0 was a significant release aimed at improving performance and introducing new syntax features.

Key features:

• Satisfies Operator: Introduced the `satisfies` operator to ensure that an object meets a specific interface or type without enforcing excess properties.
• Expanded Variadic Tuple Types: Allowed more expressive and flexible use of variadic tuple types.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-5-0.html

TypeScript 4.9 introduced new functionality and refinements to the type-checking system.

Key features:

• `satisfies` Operator: This operator ensures that a value satisfies a particular type without widening it.
• Narrowing with `in`: Improved narrowing using the `in` keyword when checking for properties on objects.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-9.html

TypeScript 4.8 brought improvements to type inference and performance, especially in large projects.

Key features:

• Improved Intersection Reductions: More accurate inference of complex intersection types.
• Better Handling of Narrowing with `unknown`: Improved narrowing rules for types involving `unknown`.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-8.html

TypeScript 4.7 introduced several important features, including enhancements to module support and handling of ECMAScript features.

Key features:

• ECMAScript Module Support in Node.js: Added support for working with ESM in Node.js environments.
• Type Checking with `await` in Top-Level Code: Enabled the use of `await` at the top level, simplifying asynchronous workflows.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-7.html

TypeScript 4.6 focused on improving error reporting and better type inference across complex scenarios.

Key features:

• `–strictFunctionTypes` by Default: Improved function type safety by enforcing stricter function types.
• Improved Error Messages: Enhanced error messages, especially for type mismatches, making them more user-friendly.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-6.html

TypeScript 4.5 introduced several important language features and refinements to the module system.

Key features:

• ES Module Support in Node.js: Provided native support for ECMAScript modules in Node.js.
• Template String Types as Discriminants: Allowed template strings to be used as discriminants in union types.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-5.html

TypeScript 4.4 continued improving type checking and error reporting, alongside significant performance optimizations.

Key features:

• Control Flow Analysis for Destructured Variables: Improved type inference for destructuring assignments.
• `override` Keyword: Introduced an `override` keyword to ensure methods are overriding a base class method.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-4.html

TypeScript 4.3 focused on refinements to the type system, providing better inference and type-checking rules.

Key features:

• `get` and `set` Accessors with Different Types: Allowed different types for getters and setters in object properties.
• Template Literal Type Improvements: More powerful type inference when working with template literal types.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-3.html

TypeScript 4.2 introduced more refinements to the type-checking system and language features.

Key features:

• Leading/Middle Rest Elements in Tuple Types: Allowed rest elements to appear at the beginning or in the middle of tuple types.
• Smarter Type Alias Expansion: Improved the expansion of recursive type aliases.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-2.html

TypeScript 4.1 brought significant changes to the language with improvements in template literal types and key remapping in mapped types.

Key features:

• Template Literal Types: Allowed developers to use template strings as types, providing more flexibility with strings in type systems.
• Key Remapping in Mapped Types: Enabled key renaming in mapped types, allowing more precise type manipulations.

Official documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-1.html

TypeScript 4.0 was a major release that introduced a number of powerful features to improve the scalability and flexibility of TypeScript projects.

Key features:

• Variadic Tuple Types: Allowed tuples to have more flexible types, making it easier to work with functions that take a varying number of arguments.
• Labeled Tuple Elements: Added support for named tuple elements, improving code readability.
• Short-Circuit Assignment Operators (`&&=`, `]] | typescript_version_history | =`, ` series introduced various features, including improvements in error messaging, types, and better integration with JavaScript.

• TypeScript 3.9 (2020): Faster Builds and improved error messages.
• TypeScript 3.8 (2020): `export type` and `private` fields in classes.
• TypeScript 3.7 (2019): Optional Chaining (`?.`) and Nullish Coalescing (`??`).
• TypeScript 3.6 (2019): Stricter checking for iterators and generators.
• TypeScript 3.5 (2019): Omit helper type and faster `–incremental` builds.
• TypeScript 3.4 (2019): Improved speed with `–incremental` flag.
• TypeScript 3.3 (2019): Better incremental support.
• TypeScript 3.2 (2018): Support for `–project` references and better `readonly` arrays.

Full documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-0.html

The TypeScript 2.x series brought substantial changes, improving type inference, type checking, and productivity.

• TypeScript 2.9 (2018): Type checking for template literals.
• TypeScript 2.8 (2018): Conditional types.
• TypeScript 2.7 (2018): Stricter class property checks.
• TypeScript 2.6 (2017): Strict function types.
• TypeScript 2.5 (201

7): Implicit `any` errors in `.js` files.

• TypeScript 2.4 (2017): Dynamic `import()` expressions.
• TypeScript 2.3 (2017): Default and optional property support.
• TypeScript 2.2 (2017): `Object.keys()` type inference.
• TypeScript 2.1 (2016): Support for async/await and improved inference.
• TypeScript 2.0 (2016): Non-nullable types, control flow analysis, and tagged union types.

Full documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-0.html

The initial releases of TypeScript focused on establishing the basic syntax, tooling, and type system.

• TypeScript 1.8 (2016): String literals and new module resolution options.
• TypeScript 1.7 (2015): async/await support for ECMAScript 6.
• TypeScript 1.6 (2015): Support for React/JSX.
• TypeScript 1.5 (2015): ES6 modules and decorators.
• TypeScript 1.0 (2014): The official launch, introducing basic types, interfaces, and classes.

Full documentation: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-1-0.html

Since its inception, TypeScript has evolved into a robust, statically-typed superset of JavaScript, with powerful features that help developers catch errors early and build scalable applications. With each release, TypeScript has introduced enhancements to both the type system and the language, keeping pace with the latest features of JavaScript while providing developers with tools to build better software. Each version adds refinements that make the language easier to use, with a focus on improving developer productivity, tooling, and performance.

GPT o1 Pro mode:

TypeScript Programming Language, TypeScript Compiler, TypeScript tsc Command, TypeScript Transpilation, TypeScript Type Annotation, TypeScript Interface, TypeScript Type Alias, TypeScript Enum, TypeScript Class, TypeScript Module, TypeScript Namespace, TypeScript Ambient Declaration, TypeScript d.ts File, TypeScript Declaration File, TypeScript tsconfig.json, TypeScript Strict Mode, TypeScript Strict Null Checks, TypeScript Non-Null Assertion Operator, TypeScript Type Inference, TypeScript Union Type, TypeScript Intersection Type, TypeScript Generics, TypeScript Generic Constraints, TypeScript Generic Default Type, TypeScript Partial Type, TypeScript Readonly Type, TypeScript Pick Type, TypeScript Omit Type, TypeScript Exclude Type, TypeScript Extract Type, TypeScript Record Type, TypeScript ReturnType Type, TypeScript Parameters Type, TypeScript ConstructorParameters Type, TypeScript InstanceType Type, TypeScript Required Type, TypeScript NonNullable Type, TypeScript ThisType, TypeScript Unknown Type, TypeScript Never Type, TypeScript Any Type, TypeScript Void Type, TypeScript Object Type, TypeScript Symbol Type, TypeScript Literal Type, TypeScript Template Literal Type, TypeScript Indexed Access Type, TypeScript Conditional Type, TypeScript Infer Keyword, TypeScript Mapped Type, TypeScript Keyof Keyword, TypeScript In Keyword (Types), TypeScript Extends Keyword (Types), TypeScript Structural Typing, TypeScript Duck Typing, TypeScript Nominal Typing (via branding), TypeScript Interface Merging, TypeScript Declaration Merging, TypeScript Module Augmentation, TypeScript Ambient Module, TypeScript Triple-Slash Directive, TypeScript Reference Path, TypeScript Reference Types, TypeScript Reference Lib, TypeScript Reference NoDefaultLib, TypeScript JSX, TypeScript TSX, TypeScript React JSX, TypeScript JSX.Element, TypeScript JSX.IntrinsicElements, TypeScript JSX.ElementClass, TypeScript Decorator, TypeScript Experimental Decorators, TypeScript Metadata Reflection API, TypeScript EmitDecoratorMetadata, TypeScript Decorator Factory, TypeScript Class Decorator, TypeScript Method Decorator, TypeScript Property Decorator, TypeScript Parameter Decorator, TypeScript Accessor Decorator, TypeScript Abstract Class, TypeScript Public Keyword, TypeScript Private Keyword, TypeScript Protected Keyword, TypeScript Readonly Keyword, TypeScript Static Keyword, TypeScript Implements Keyword, TypeScript Extends Keyword (Classes), TypeScript Super Keyword, TypeScript Constructor Parameter Properties, TypeScript Access Modifiers, TypeScript Index Signature, TypeScript Optional Chaining Operator, TypeScript Nullish Coalescing Operator, TypeScript Assertion Function, TypeScript Assertion Signature, TypeScript Type Assertion, TypeScript as Keyword, TypeScript Angle Bracket Assertion (Older Syntax), TypeScript Definite Assignment Assertion, TypeScript Discriminated Union, TypeScript Tagged Union, TypeScript Branded Type, TypeScript Intersection Property Distribution, TypeScript Function Type, TypeScript Call Signature, TypeScript Construct Signature, TypeScript Overloaded Function, TypeScript Rest Parameters, TypeScript Default Parameters, TypeScript Arrow Function Type, TypeScript Void Return Type, TypeScript Unknown Return Type, TypeScript Promise Type, TypeScript Async Function Type, TypeScript Awaited Type, TypeScript Generator Type, TypeScript Iterator Type, TypeScript Iterable Type, TypeScript IterableIterator Type, TypeScript AsyncIterable Type, TypeScript AsyncIterator Type, TypeScript AsyncIterableIterator Type, TypeScript Symbol.iterator, TypeScript Symbol.asyncIterator, TypeScript Symbol.hasInstance, TypeScript Symbol.species, TypeScript Symbol.toPrimitive, TypeScript Symbol.toStringTag, TypeScript Interface Inheritance, TypeScript Extending Interface, TypeScript Implementing Interface, TypeScript Hybrid Types, TypeScript Callable Interface, TypeScript Newable Interface, TypeScript Class Expression, TypeScript Abstract Method, TypeScript Abstract Property, TypeScript Abstract Constructor, TypeScript Class Fields, TypeScript Parameter Decorators, TypeScript Reflect Metadata, TypeScript JSDoc Annotations, TypeScript @type JSDoc Tag, TypeScript @typedef JSDoc Tag, TypeScript @template JSDoc Tag, TypeScript @param JSDoc Tag, TypeScript @returns JSDoc Tag, TypeScript StrictBindCallApply, TypeScript StrictFunctionTypes, TypeScript StrictPropertyInitialization, TypeScript StrictNullChecks Flag, TypeScript NoImplicitAny, TypeScript NoImplicitThis, TypeScript AlwaysStrict, TypeScript NoUnusedLocals, TypeScript NoUnusedParameters, TypeScript NoImplicitReturns, TypeScript NoFallthroughCasesInSwitch, TypeScript StrictUnknownChecks, TypeScript StrictBindCallApply, TypeScript NoImplicitOverride, TypeScript UseUnknownInCatchVariables, TypeScript ImportsNotUsedAsValues, TypeScript IsolatedModules, TypeScript PreserveSymlinks, TypeScript BaseUrl, TypeScript Paths Mapping, TypeScript RootDirs, TypeScript Composite Projects, TypeScript Build Mode, TypeScript Incremental Compilation, TypeScript DeclarationMap, TypeScript SourceMap, TypeScript InlineSourceMap, TypeScript InlineSources, TypeScript RemoveComments, TypeScript NoEmit, TypeScript NoEmitOnError, TypeScript OutDir, TypeScript OutFile, TypeScript RootDir, TypeScript TsBuildInfoFile, TypeScript DeclarationDir, TypeScript ListFiles, TypeScript ListEmittedFiles, TypeScript Extended Diagnostics, TypeScript Diagnostics, TypeScript TraceResolution, TypeScript ExplainFiles, TypeScript StripInternal, TypeScript StrictOptionCheck, TypeScript StrictModeFlags, TypeScript Syntactic Diagnostics, TypeScript Semantic Diagnostics, TypeScript Declaration Diagnostics, TypeScript PseudoBigInt, TypeScript Bigint Literal, TypeScript Bigint Type, TypeScript IntrinsicAttributes, TypeScript IntrinsicClassAttributes, TypeScript IntrinsicElements, TypeScript Global Augmentation, TypeScript Shorthand Ambient Module, TypeScript Export As Namespace, TypeScript Export =, TypeScript Import = require, TypeScript Type-Only Imports, TypeScript Type-Only Exports, TypeScript Export Type, TypeScript Import Type, TypeScript typeof Type Operator, TypeScript keyof Type Operator, TypeScript unique symbol, TypeScript Template Literal Type Inference, TypeScript Variadic Tuple Types, TypeScript Labeled Tuple Elements, TypeScript Template Literal Type, TypeScript Template Literal String, TypeScript Indexed Access Types, TypeScript Conditional Types Extended, TypeScript Distributed Conditional Types, TypeScript Recursive Conditional Types, TypeScript Tail Recursion Elimination, TypeScript Type Guards, TypeScript User-Defined Type Guard, TypeScript in Type Guards, TypeScript instanceof Type Guards, TypeScript typeof Type Guards, TypeScript Assertion Signatures, TypeScript Definite Assignment Assertions, TypeScript Control Flow Analysis, TypeScript Control Flow Based Type Analysis, TypeScript Control Flow Graph, TypeScript Flow Nodes, TypeScript Narrowing, TypeScript Type Predicates, TypeScript Function Overloads, TypeScript Declaration Emit, TypeScript Declaration Transformation, TypeScript Symbol Table, TypeScript Binder, TypeScript Checker, TypeScript Emitter, TypeScript Transformer, TypeScript Compiler Host, TypeScript Language Service, TypeScript Compiler API, TypeScript AST (Abstract Syntax Tree), TypeScript Node Interface, TypeScript SourceFile, TypeScript SyntaxKind Enum, TypeScript Checker API, TypeScript Program API, TypeScript TypeChecker API, TypeScript CompilerOptions Interface, TypeScript CompilerOptions Diagnostics, TypeScript ProjectReferences, TypeScript Composite Flag, TypeScript Declaration Flag, TypeScript Incremental Flag, TypeScript TSBuildInfo File, TypeScript watch Mode, TypeScript watchFile, TypeScript watchDirectory, TypeScript createProgram, TypeScript createWatchProgram, TypeScript createIncrementalProgram, TypeScript createSolutionBuilder, TypeScript createSolutionBuilderWithWatch, TypeScript resolveModuleName, TypeScript resolveTypeReferenceDirective, TypeScript Custom Module Resolution, TypeScript Plugin API, TypeScript Compiler Plugin, TypeScript Language Service Plugin, TypeScript CompletionInfo, TypeScript CompletionEntry, TypeScript SignatureHelp, TypeScript QuickInfo, TypeScript DefinitionInfo, TypeScript ImplementationInfo, TypeScript CodeFixAction, TypeScript CodeFix, TypeScript RefactorInfo, TypeScript RefactorActionInfo, TypeScript NavigationBarItem, TypeScript NavigationTree, TypeScript RenameInfo, TypeScript RenameLocations, TypeScript FormattingOptions, TypeScript TextChange, TypeScript EditorSettings, TypeScript UserPreferences, TypeScript CompilerHost.getSourceFile, TypeScript CompilerHost.getDefaultLibFileName, TypeScript CompilerHost.writeFile, TypeScript resolveModuleNames Hook, TypeScript resolveTypeReferenceDirectives Hook, TypeScript writeFile Callback, TypeScript CustomTransformers, TypeScript TransformerFactory, TypeScript TransformerContext, TypeScript Visitor Function, TypeScript updateSourceFileNode, TypeScript updateNode, TypeScript Printer API, TypeScript createPrinter, TypeScript PrintHandlers, TypeScript PrintFile, TypeScript Type Format Flags, TypeScript Symbol Display Builder, TypeScript TypeToString, TypeScript SymbolToString, TypeScript Diagnostic Message, TypeScript Diagnostic Category, TypeScript Diagnostic Code, TypeScript DiagnosticRelatedInformation, TypeScript DiagnosticReporter, TypeScript EmitResult, TypeScript PreEmitDiagnostics, TypeScript SyntacticDiagnostics, TypeScript SemanticDiagnostics, TypeScript DeclarationDiagnostics, TypeScript getParsedCommandLineOfConfigFile, TypeScript parseJsonConfigFileContent, TypeScript convertCompilerOptionsFromJson, TypeScript resolveProjectReferencePath, TypeScript getAllProjectReferences, TypeScript LanguageServer Protocol Integration, TypeScript tsserver, TypeScript tsserverlibrary, TypeScript tsserver API, TypeScript tsserverplugin, TypeScript Editor Integration, TypeScript Sublime Text Integration, TypeScript VSCode Integration, TypeScript WebStorm Integration, TypeScript Eclipse Integration, TypeScript Vim Integration, TypeScript Emacs Integration, TypeScript Atom Integration, TypeScript Monaco Editor Integration, TypeScript Playground, TypeScript REPL Tools, TypeScript Node Integration, TypeScript Deno Integration, TypeScript Babel Integration, TypeScript Webpack Loader, TypeScript Rollup Plugin, TypeScript Parcel Integration, TypeScript FuseBox Integration, TypeScript Gulp Integration, TypeScript Grunt Integration, TypeScript ESLint Integration, TypeScript TSLint (Deprecated), TypeScript Prettier Integration, TypeScript Formatter, TypeScript Linter, TypeScript Language Server, TypeScript Server Plugin, TypeScript Vue SFC Integration, TypeScript Angular Integration, TypeScript React Integration, TypeScript JSX Mode, TypeScript TSX Mode, TypeScript Next.js Integration, TypeScript Gatsby Integration, TypeScript Nuxt.js Integration, TypeScript Svelte Integration, TypeScript Stencil Integration, TypeScript LitElement Integration, TypeScript Polymer Integration, TypeScript RxJS Type Definitions, TypeScript Node Type Definitions, TypeScript DOM Type Definitions, TypeScript ESNext Type Definitions, TypeScript ES2015 Type Definitions, TypeScript ES2017 Type Definitions, TypeScript ES2020 Type Definitions, TypeScript ES2021 Type Definitions, TypeScript ES2022 Type Definitions, TypeScript ES3 Compatibility, TypeScript ES5 Target, TypeScript ES6 Target, TypeScript ES2015 Target, TypeScript ES2017 Target, TypeScript ES2018 Target, TypeScript ES2019 Target, TypeScript ES2020 Target, TypeScript ES2021 Target, TypeScript ES2022 Target, TypeScript ESNext Target, TypeScript Module CommonJS, TypeScript Module AMD, TypeScript Module UMD, TypeScript Module SystemJS, TypeScript Module ESNext, TypeScript Module NodeNext, TypeScript Module Node16, TypeScript Lib ES5, TypeScript Lib ES6, TypeScript Lib ES2015, TypeScript Lib ES2016, TypeScript Lib ES2017, TypeScript Lib ES2018, TypeScript Lib ES2019, TypeScript Lib ES2020, TypeScript Lib ES2021, TypeScript Lib ES2022, TypeScript Lib DOM, TypeScript Lib Webworker, TypeScript Lib Webworker.Iterable, TypeScript Lib ScriptHost, TypeScript Lib DOM.Iterable, TypeScript Lib ESNext, TypeScript Target Option, TypeScript ModuleResolutionOption, TypeScript BaseUrl Option, TypeScript RootDirs Option, TypeScript Paths Option, TypeScript TypeRoots Option, TypeScript Types Option, TypeScript TraceResolution Option, TypeScript PreserveSymlinks Option, TypeScript AllowJs, TypeScript CheckJs, TypeScript Declaration, TypeScript DeclarationMap, TypeScript RemoveComments, TypeScript Incremental, TypeScript Composite, TypeScript InlineSourceMap, TypeScript InlineSources, TypeScript SourceMap, TypeScript IsolatedModules, TypeScript SkipLibCheck, TypeScript SkipDefaultLibCheck, TypeScript ForceConsistentCasingInFileNames, TypeScript RootDir, TypeScript OutDir, TypeScript OutFile, TypeScript AllowSyntheticDefaultImports, TypeScript ExperimentalDecorators, TypeScript EmitDecoratorMetadata, TypeScript DownlevelIteration, TypeScript StrictBindCallApply Option, TypeScript StrictPropertyInitialization Option, TypeScript UseUnknownInCatchVariables Option, TypeScript ImportsNotUsedAsValues Option, TypeScript PreserveConstEnums, TypeScript NoEmit, TypeScript NoEmitOnError, TypeScript ImportHelpers, TypeScript IsolatedModules Option, TypeScript Babel Plugin Transform TypeScript, TypeScript TypeDoc Integration, TypeScript API Extractor Integration, TypeScript Source Maps Support, TypeScript Decorators Metadata, TypeScript Experimental Flags, TypeScript Constraint Satisfaction, TypeScript Indexed Access Update, TypeScript Watch Mode Iteration, TypeScript watchFile Strategy, TypeScript watchDirectory Strategy, TypeScript incremental compilation cache, TypeScript composite build mode, TypeScript build reference, TypeScript output chunking, TypeScript declaration bundling, TypeScript path mapping resolution, TypeScript module specifier resolution, TypeScript import elision, TypeScript JSX factory, TypeScript JSX fragment factory, TypeScript JSX runtime, TypeScript preserve JSX, TypeScript react-jsx mode, TypeScript react-jsxdev mode, TypeScript isolated JSX namespace, TypeScript intrinsic element attribute types, TypeScript union type narrowing, TypeScript control flow narrowing, TypeScript discriminant property checks, TypeScript exhaustive switch checks, TypeScript unreachable code detection, TypeScript definite assignment checks, TypeScript optional property checks, TypeScript template literal type inference, TypeScript partial inference in generic, TypeScript tuple type inference, TypeScript tuple variance, TypeScript mapped type modifiers, TypeScript template literal type patterns, TypeScript conditional type inference patterns, TypeScript recursive type references, TypeScript tail-call optimization in types, TypeScript big integer literal types, TypeScript symbol literal types, TypeScript unique symbol types, TypeScript indexed access constraints, TypeScript type compatibility rules, TypeScript subtype and assignability, TypeScript assignability checks, TypeScript structural typing rules, TypeScript type alias circular references, TypeScript limit on instantiation depth, TypeScript error message hints, TypeScript suggestion diagnostics, TypeScript code actions, TypeScript refactorings, TypeScript organize imports, TypeScript rename symbol, TypeScript code fix all, TypeScript diagnostic tags, TypeScript unreachable code is error, TypeScript deprecated API warnings, TypeScript quick fixes for missed imports, TypeScript auto import suggestions, TypeScript auto fix on save, TypeScript incremental build watch, TypeScript composite project references, TypeScript solution style tsconfig, TypeScript project graph, TypeScript project dependency, TypeScript build order, TypeScript outDir redirect, TypeScript preserve watch output order, TypeScript advanced module resolution tracing, TypeScript plugin config in tsconfig, TypeScript plugin diagnostics, TypeScript plugin extra file extensions, TypeScript plugin language service extension, TypeScript server high memory usage, TypeScript server performance tracing, TypeScript server logVerbosity, TypeScript server cancellation tokens, TypeScript language server protocol features, TypeScript auto import from inferred project, TypeScript auto @ts-check in JS, TypeScript checkJs mode, TypeScript allowJs mode, TypeScript declaration and allowJs, TypeScript composite and allowJs, TypeScript incremental and composite flags

GPT 4o:

TypeScript: TypeScript Glossary, TypeScript Best Practices, Web Development Best Practices, JavaScript Best Practices, TypeScript Fundamentals, TypeScript Inventor - TypeScript Language Designer: Anders Hejlsberg of Microsoft on October 1, 2012; TypeScript Keywords, TypeScript Built-In Data Types, TypeScript Data Structures - TypeScript Algorithms, TypeScript Syntax, TypeScript on Linux, TypeScript on macOS, TypeScript on Windows, TypeScript on Android, TypeScript on iOS, TypeScript Installation, TypeScript Containerization (TypeScript with Docker, TypeScript with Podman, TypeScript and Kubernetes), TypeScript OOP - TypeScript Design Patterns, Clean TypeScript - TypeScript Style Guide, TypeScript Best Practices - TypeScript BDD, Web Browser, Web Development, HTML-CSS, TypeScript Frameworks (Angular), JavaScript Libraries (React.js with TypeScript, Vue.js with TypeScript, jQuery with TypeScript), TypeScript on the Server (TypeScript with Node.js, TypeScript with Deno, TypeScript with Express.js), TypeScript Compiler (tsc, tsconfig.json), TypeScript Transpiler (Transpile TypeScript into JavaScript), Babel and TypeScript, TypeScript Package Management, NPM and TypeScript, NVM and TypeScript, Yarn Package Manager and TypeScript, TypeScript IDEs (Visual Studio Code, Visual Studio, JetBrains WebStorm), TypeScript Development Tools, TypeScript Linter, TypeScript Debugging (Chrome DevTools, JavaScript Source Maps), TypeScript Testing (TypeScript TDD, Selenium, Jest, Mocha.js, Jasmine, Tape Testing (tap-producing test harness for Node.js and browsers), Supertest, React Testing Library, Enzyme.js React Testing, Angular TestBed), TypeScript DevOps - TypeScript SRE, TypeScript Data Science - TypeScript DataOps, TypeScript Machine Learning, TypeScript Deep Learning, Functional TypeScript, TypeScript Concurrency (WebAssembly - WASM) - TypeScript Async (TypeScript Await, TypeScript Promises, TypeScript Workers - Web Workers, Service Workers, Browser Main Thread), TypeScript Concurrency, TypeScript History, TypeScript Bibliography, Manning TypeScript Series, TypeScript Glossary - Glossaire de TypeScript - French, TypeScript T, TypeScript Courses, TypeScript Standard Library, TypeScript Libraries, TypeScript Frameworks (Angular), TypeScript Research, JavaScript, TypeScript GitHub, Written in TypeScript, TypeScript Popularity, TypeScript Awesome, TypeScript Versions. (navbar_typescript - see also navbar_javascript, navbar_typescript_networking, navbar_javascript_libraries, navbar_typescript_libraries, navbar_typescript_versions, navbar_typescript_standard_library, navbar_typescript_libraries, navbar_typescript_reserved_words, navbar_typescript_functional, navbar_typescript_concurrency, navbar_typescript_async, navbar_javascript_standard_library, navbar_react.js, navbar_angular, navbar_vue, navbar_javascript_standard_library, navbar_web_development)