narrow down possible status codes for redirects to 300-308

.changeset/brown-seas-sort.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+[breaking] narrow down possible status codes for redirects to 300-308

packages/kit/src/exports/index.js

@@ -13,7 +13,7 @@ export function error(status, message) {
 
 /** @type {import('@sveltejs/kit').redirect} */
 export function redirect(status, location) {
-	if (isNaN(status) || status < 300 || status > 399) {
+	if (isNaN(status) || status < 300 || status > 308) {
 		throw new Error('Invalid status code');
 	}
 

packages/kit/src/runtime/control.js

@@ -58,11 +58,11 @@ export function error(status, message) {
 /**
  * Creates a `Redirect` object. If thrown during request handling, SvelteKit will
  * return a redirect response.
- * @param {number} status
+ * @param {300 | 301 | 302 | 303 | 304 | 305 | 306 | 307 | 308} status
  * @param {string} location
  */
 export function redirect(status, location) {
-	if (isNaN(status) || status < 300 || status > 399) {
+	if (isNaN(status) || status < 300 || status > 308) {
 		throw new Error('Invalid status code');
 	}
 

packages/kit/types/index.d.ts

@@ -731,7 +731,10 @@ export function error(
  * Creates a `Redirect` object. If thrown during request handling, SvelteKit will
  * return a redirect response.
  */
-export function redirect(status: number, location: string): Redirect;
+export function redirect(
+	status: 300 | 301 | 302 | 303 | 304 | 305 | 306 | 307 | 308,
+	location: string
+): Redirect;
 
 /**
  * Generates a JSON `Response` object from the supplied data.