feat: add example for collectTypeScriptInfo (#307)

Author: ahabhgk

pnpm-lock.yaml

@@ -0,0 +1,14 @@
+{
+  "name": "example-builtin-swc-loader",
+  "version": "1.0.0",
+  "private": true,
+  "license": "MIT",
+  "main": "index.js",
+  "scripts": {
+    "build": "rspack build"
+  },
+  "devDependencies": {
+    "@rspack-canary/cli": "1.4.0-canary-30c614aa-20250626094549",
+    "@rspack-canary/core": "1.4.0-canary-30c614aa-20250626094549"
+  }
+}

rspack/collect-typescript-info/package.json

@@ -0,0 +1,51 @@
+// @ts-check
+
+/** @type {import("@rspack-canary/core").Configuration} */
+export default {
+  entry: {
+    main: "./src/index.ts",
+  },
+  experiments: {
+    css: true,
+    inlineEnum: true,
+    typeReexportsPresence: true,
+  },
+  mode: "production",
+  optimization: {
+    // disable minimize so you can understand the output
+    minimize: false,
+  },
+  resolve: {
+    extensions: [".ts", "..."],
+  },
+  module: {
+    parser: {
+      javascript: {
+        typeReexportsPresence: "tolerant"
+      }
+    },
+    rules: [
+      {
+        test: /\.ts$/,
+        use: {
+          loader: "builtin:swc-loader",
+          /** @type {import("@rspack-canary/core").SwcLoaderOptions} */
+          options: {
+            jsc: {
+              parser: {
+                syntax: "typescript",
+              },
+            },
+            rspackExperiments: {
+              collectTypeScriptInfo: {
+                typeExports: true,
+                exportedEnum: true,
+              }
+            }
+          },
+        },
+        type: "javascript/auto",
+      },
+    ],
+  },
+};

rspack/collect-typescript-info/rspack.config.mjs

@@ -0,0 +1,4 @@
+export enum Kind {
+  A,
+  B,
+}

rspack/collect-typescript-info/src/enums.ts

@@ -0,0 +1,10 @@
+import { Kind, TypeA, TypeB } from './reexports';
+
+const a: TypeA = 42;
+const b: TypeB = 'rspack';
+
+console.log(a, b);
+
+// Take a look at the build output (dist/main.js)
+// Should inline Kind.A to 0 and Kind.B to 1 here since we configured inlineEnum
+console.log(Kind.A, Kind.B);

rspack/collect-typescript-info/src/index.ts

@@ -0,0 +1,8 @@
+export * from './enums';
+
+// Should not report ESModulesLinkingWarning since we configured `typeReexportsPresence: "tolerant"`
+// case 1:
+export { TypeA } from './types';
+// case 2:
+import { TypeB } from './types';
+export { TypeB };

rspack/collect-typescript-info/src/reexports.ts

@@ -0,0 +1,2 @@
+export type TypeA = number;
+export type TypeB = string;