feat: Enable .ts imports

eslint/presets/typescript-react.test/App.tsx

@@ -1,4 +1,5 @@
 import { useEffect, useRef, useState } from "react";
+import { Other } from "./Other.tsx";
 
 export const App = (_props: { name: string; count: number }) => {
   for (let index = 0; index < 10; index++) {
@@ -28,6 +29,7 @@ export const App = (_props: { name: string; count: number }) => {
       {"Hello world"}
       {/* eslint-disable-next-line @eslint-react/no-leaked-conditional-rendering */}
       <>{_props.count && <view />}</>
+      <Other />
     </>
   );
 };

eslint/presets/typescript.test/main.ts

@@ -1,4 +1,4 @@
-import { getMessage } from "./message.js";
+import { getMessage } from "./message.ts";
 // Check if import attributes are detected and formatted correctly
 import test from "./test.json" with { type: "json" };
 

typescript/base.json

@@ -1,9 +1,13 @@
 {
   "compilerOptions": {
+    "allowImportingTsExtensions": true,
     "checkJs": true,
+    // TODO: Enable erasableSyntaxOnly when TS 5.8 is released
+    // https://www.totaltypescript.com/erasable-syntax-only
+    // "erasableSyntaxOnly": true,
     "esModuleInterop": true,
-    // We decided to turn off `exactOptionalPropertyTypes` because it's too strict
     // by complaining about too much unproblematic code. We may revisit this decision later.
+    // We decided to turn off `exactOptionalPropertyTypes` because it's too strict
     "exactOptionalPropertyTypes": false,
     "forceConsistentCasingInFileNames": true,
     "isolatedModules": true,
@@ -15,13 +19,11 @@
     "noPropertyAccessFromIndexSignature": true,
     "noUncheckedIndexedAccess": true,
     "resolveJsonModule": true,
+    "rewriteRelativeImportExtensions": true,
     "skipLibCheck": true,
     "strict": true,
-    "target": "ESNext"
-    // TODO: Turn on the following settings once TS 5.7 is released, see also https://nodejs.org/docs/latest/api/typescript.html#typescript-features
-    // "allowImportingTsExtensions": true,
-    // "rewriteRelativeImportExtensions": true,
-    // "verbatimModuleSyntax": true
+    "target": "ESNext",
+    "verbatimModuleSyntax": true
   },
   "$schema": "https://json.schemastore.org/tsconfig"
 }