Don't use type as a variable name as it is a TS keyword.

source/redirect/base.ts

@@ -4,12 +4,12 @@ export const redirectTypes = ['hostname', 'simple'] as const;
 export type MatcherType = typeof matcherTypes[number];
 export type RedirectType = typeof redirectTypes[number];
 
-export function narrowMatchType(type: string): type is MatcherType {
+export function narrowMatchType(value: string): value is MatcherType {
-  return matcherTypes.includes(type as MatcherType);
+  return matcherTypes.includes(value as MatcherType);
 }
 
-export function narrowRedirectType(type: string): type is RedirectType {
+export function narrowRedirectType(value: string): value is RedirectType {
-  return redirectTypes.includes(type as RedirectType);
+  return redirectTypes.includes(value as RedirectType);
 }
 
 export type Matcher = {
@@ -18,7 +18,7 @@ export type Matcher = {
 };
 
 export type RedirectParameters = {
-  type: RedirectType;
+  redirectType: RedirectType;
 };
 
 export abstract class Redirect<P extends RedirectParameters> {

source/redirect/exports.ts

@@ -10,13 +10,13 @@ export type Redirects = HostnameRedirect | SimpleRedirect;
 export function parseRedirect<P extends Redirects['parameters']>(
   parameters: P,
 ): Redirects | undefined {
-  const type = parameters?.type;
+  const redirectType = parameters?.redirectType;
 
-  if (type === 'hostname') {
+  if (redirectType === 'hostname') {
     return new HostnameRedirect(parameters);
   }
 
-  if (type === 'simple') {
+  if (redirectType === 'simple') {
     return new SimpleRedirect(parameters);
   }
 }

source/redirect/hostname.ts

@@ -2,7 +2,7 @@ import {Redirect} from './base.js';
 
 export type HostnameParameters = {
   hostname: string;
-  type: 'hostname';
+  redirectType: 'hostname';
 };
 
 export class HostnameRedirect extends Redirect<HostnameParameters> {

source/redirect/simple.ts

@@ -2,7 +2,7 @@ import {Redirect} from './base.js';
 
 export type SimpleParameters = {
   target: string;
-  type: 'simple';
+  redirectType: 'simple';
 };
 
 export class SimpleRedirect extends Redirect<SimpleParameters> {

tests/redirect.test.ts

@@ -19,14 +19,14 @@ const hostnameParameters: HostnameRedirect['parameters'] = {
   hostname: 'example.org',
   matcherType: 'hostname',
   toMatch: 'example.com',
-  type: 'hostname',
+  redirectType: 'hostname',
 };
 
 const simpleParameters: SimpleRedirect['parameters'] = {
   matcherType: 'hostname',
   target: 'https://example.org/simple',
   toMatch: 'example.com',
-  type: 'simple',
+  redirectType: 'simple',
 };
 
 test('parseRedirect', (t) => {
@@ -101,6 +101,6 @@ test('Redirect.isMatch', (t) => {
 test('Narrow match & redirect types', (t) => {
   t.false(narrowMatchType('invalid'));
   t.false(narrowRedirectType('invalid'));
-  t.true(matcherTypes.every((type) => narrowMatchType(type)));
+  t.true(matcherTypes.every((value) => narrowMatchType(value)));
-  t.true(redirectTypes.every((type) => narrowRedirectType(type)));
+  t.true(redirectTypes.every((value) => narrowRedirectType(value)));
 });

tests/snapshots/tests/redirect.test.ts.md

@@ -12,8 +12,8 @@ Generated by [AVA](https://avajs.dev).
       parameters: {
         hostname: 'example.org',
         matcherType: 'hostname',
+        redirectType: 'hostname',
         toMatch: 'example.com',
-        type: 'hostname',
       },
     }
 
@@ -22,9 +22,9 @@ Generated by [AVA](https://avajs.dev).
     SimpleRedirect {
       parameters: {
         matcherType: 'hostname',
+        redirectType: 'simple',
         target: 'https://example.org/simple',
         toMatch: 'example.com',
-        type: 'simple',
       },
     }