Improve typing for min/max

No null if at least one date is passed; only null if explicitly no dates are passed.
iamkun · Feb 7, 2024 · 3dd0b6a · 3dd0b6a
1 parent bdcc336
commit 3dd0b6a
Showing 1 changed file with 15 additions and 4 deletions.
diff --git a/types/plugin/minMax.d.ts b/types/plugin/minMax.d.ts
@@ -4,8 +4,19 @@ declare const plugin: PluginFunc
 export = plugin
 
 declare module 'dayjs' {
-  export function max(dayjs: Dayjs[]): Dayjs | null
-  export function max(...dayjs: Dayjs[]): Dayjs | null
-  export function min(dayjs: Dayjs[]): Dayjs | null
-  export function min(...dayjs: Dayjs[]): Dayjs | null
+  export function max(dayjs: [Dayjs, ...Dayjs[]]): Dayjs
+  export function max(noDates: never[]): null
+  export function max(maybeDates: Dayjs[]): Dayjs | null
+
+  export function max(...dayjs: [Dayjs, ...Dayjs[]]): Dayjs
+  export function max(...noDates: never[]): null
+  export function max(...maybeDates: Dayjs[]): Dayjs | null
+
+  export function min(dayjs: [Dayjs, ...Dayjs[]]): Dayjs
+  export function min(noDates: never[]): null
+  export function min(maybeDates: Dayjs[]): Dayjs | null
+
+  export function min(...dayjs: [Dayjs, ...Dayjs[]]): Dayjs
+  export function min(...noDates: never[]): null
+  export function min(...maybeDates: Dayjs[]): Dayjs | null
 }