[英]How to create a type function that checks whether a type is empty object in TypeScript?
Is it possible to create a type function IsEmpty
such that:是否可以创建一个类型 function
IsEmpty
使得:
type a = IsEmpty<{}> // true
type b = IsEmpty<{x: 1}> // never
type IsEmpty<T> = {} extends T ? true : never;
see conditional type见条件类型
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