新版本的变更 / TypeScript 3.7
Optional chaining (?.)
Nullish coalescing operator (??)
Assertion functions
Recursive type aliases
Uncalled function checks
Uncalled function checks
此示例属于完整版，可在应用商店购买：
TypeScript Recipes
App Store
Code Recipes
App Store
已经购买？登录您的账户