fix

Author: ahabhgk

rspack/inline-const/package.json

@@ -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/cli": "latest",
+    "@rspack/core": "latest"
+  }
+}

rspack/inline-const/rspack.config.mjs

@@ -0,0 +1,45 @@
+// @ts-check
+import { rspack } from "@rspack/core";
+
+/** @type {import("@rspack/core").Configuration} */
+export default {
+  entry: {
+    main: "./src/index.ts",
+  },
+  experiments: {
+    inlineConst: true,
+  },
+  mode: "production",
+  optimization: {
+    // disable minimize so you can understand the output
+    minimize: false,
+  },
+  resolve: {
+    extensions: [".ts", "..."],
+  },
+  plugins: [
+    new rspack.DefinePlugin({
+      ENV: JSON.stringify("mobile"),
+    }),
+  ],
+  module: {
+    rules: [
+      {
+        test: /\.ts$/,
+        use: {
+          loader: "builtin:swc-loader",
+          /** @type {import("@rspack/core").SwcLoaderOptions} */
+          options: {
+            jsc: {
+              parser: {
+                syntax: "typescript",
+              },
+              target: "es2015", // use target es2015 or greater so swc won't transform const to var
+            },
+          },
+        },
+        type: "javascript/auto",
+      },
+    ],
+  },
+};

rspack/inline-const/src/constants.ts

@@ -0,0 +1,11 @@
+export const NULL = null; // null can be inlined
+export const UNDEFINED = undefined; // undefined can be inlined
+export const isMobile = ENV === 'mobile'; // boolean can be inlined
+export const shortString = 'hhh'; // lenght <= 6 string can be inlined
+export const longString = 'string len greater than 6'; // lenght > 6 string can't be inlined
+export const shortNumber = 1.2345; // length <= 6 number can be inlined
+export const longNumber = 1.23456; // length > 6 number can't be inlined
+const a = 1 << 0;
+const b = 1 << 1;
+const c = 1 << 2;
+export const all = a | b | c; // since 'a', 'b', 'c' are all constants, so 'all' can also be inlined

rspack/inline-const/src/index.ts

@@ -0,0 +1,11 @@
+import {
+  NULL,
+  UNDEFINED,
+  isMobile,
+  shortString,
+  longString,
+  shortNumber,
+  longNumber,
+  all,
+} from './reexports';
+console.log(NULL, UNDEFINED, isMobile, shortString, longString, shortNumber, longNumber, all);

rspack/inline-const/src/reexports.ts

@@ -0,0 +1 @@
+export * from './constants';