Fix inaccurate InputElementProps type for text/select fields (#14908)

* Fix inaccurate InputElementProps type for text/select fields

* add another case for the multiple attribute

* format

* Merge branch 'main' into patch-2

* generate types

* Merge branch 'patch-2' of https://github.com/TheOnlyTails/kit into patch-2

* added changeset

* Merge branch 'main' into patch-2

Author: TheOnlyTails

.changeset/upset-tires-retire.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: improved the accuracy of the types of the output of `field.as('...')`

packages/kit/src/exports/public.d.ts

@@ -1865,13 +1865,28 @@ type InputElementProps<T extends keyof InputTypeMap> = T extends 'checkbox' | 'r
 				get files(): FileList | null;
 				set files(v: FileList | null);
 			}
-		: {
-				name: string;
-				type: T;
-				'aria-invalid': boolean | 'false' | 'true' | undefined;
-				get value(): string | number;
-				set value(v: string | number);
-			};
+		: T extends 'select' | 'select multiple'
+			? {
+					name: string;
+					multiple: T extends 'select' ? false : true;
+					'aria-invalid': boolean | 'false' | 'true' | undefined;
+					get value(): string | number;
+					set value(v: string | number);
+				}
+			: T extends 'text'
+				? {
+						name: string;
+						'aria-invalid': boolean | 'false' | 'true' | undefined;
+						get value(): string | number;
+						set value(v: string | number);
+					}
+				: {
+						name: string;
+						type: T;
+						'aria-invalid': boolean | 'false' | 'true' | undefined;
+						get value(): string | number;
+						set value(v: string | number);
+					};
 
 type RemoteFormFieldMethods<T> = {
 	/** The values that will be submitted */

packages/kit/types/index.d.ts

@@ -1841,13 +1841,28 @@ declare module '@sveltejs/kit' {
 					get files(): FileList | null;
 					set files(v: FileList | null);
 				}
-			: {
-					name: string;
-					type: T;
-					'aria-invalid': boolean | 'false' | 'true' | undefined;
-					get value(): string | number;
-					set value(v: string | number);
-				};
+			: T extends 'select' | 'select multiple'
+				? {
+						name: string;
+						multiple: T extends 'select' ? false : true;
+						'aria-invalid': boolean | 'false' | 'true' | undefined;
+						get value(): string | number;
+						set value(v: string | number);
+					}
+				: T extends 'text'
+					? {
+							name: string;
+							'aria-invalid': boolean | 'false' | 'true' | undefined;
+							get value(): string | number;
+							set value(v: string | number);
+						}
+					: {
+							name: string;
+							type: T;
+							'aria-invalid': boolean | 'false' | 'true' | undefined;
+							get value(): string | number;
+							set value(v: string | number);
+						};
 
 	type RemoteFormFieldMethods<T> = {
 		/** The values that will be submitted */