TypeScript 2.4 Dynamic Import Expressions String Enums Improved inference for generics Return types as inference targets Type parameter inference from contextual types Stricter...

TypeScript 2.6 Strict function types Example Note Cache tagged template objects in modules Example Localized diagnostics on the command line Example Suppress errors in .ts ...

TypeScript 2.9 Support number and symbol named properties with keyof and mapped types Example Example Recommendations Generic type arguments in JSX elements Example Generic ...

TypeScript 3.1 Mapped types on tuples and arrays Properties declarations on functions Version selection with typesVersions Matching behavior Multiple fields TypeScript 3.1...

TypeScript 3.2 strictBindCallApply Caveats Generic spread expressions in object literals Generic object rest variables and parameters BigInt Caveats Non-unit types as union d...

TypeScript 3.3 Improved behavior for calling union types Caveats Incremental file watching for composite projects in —build —watch TypeScript 3.3 Improved behavior for cal...

TypeScript 3.4 Faster subsequent builds with the —incremental flag Composite projects outFile Higher order type inference from generic functions Improvements for ReadonlyArray ...

TypeScript 3.7 Optional Chaining Nullish Coalescing Assertion Functions Better Support for never-Returning Functions (More) Recursive Type Aliases —declaration and —allowJs T...

Typescript 2.9 keyof和映射类型支持用number和symbol命名的属性 例子 例子 推荐 JSX元素里的泛型参数 例子 泛型标记模版里的泛型参数 例子 import类型 例子 放开声明生成时可见性规则 支持import.meta 例子 新的—resolveJsonModule 例子 默认—pretty输出...

Typescript 3.1 元组和数组上的映射类型 函数上的属性声明 使用typesVersions选择版本 匹配行为 多个字段 Typescript 3.1 元组和数组上的映射类型 TypeScript 3.1，在元组和数组上的映射对象类型现在会生成新的元组/数组，而非创建一个新的类型并且这个类型上具有如push() ，pop() ...