feat: implement syntax

.prettierignore

@@ -2,3 +2,6 @@
 dist
 compiled
 doc_build
+
+# ignore all JS/TS files, use Biome
+**/*[.js,.ts,.jsx,.tsx.json,.json5]

.vscode/settings.json

@@ -16,5 +16,26 @@
   "mdx.validate.validateFileLinks": "ignore",
   "editor.codeActionsOnSave": {
     "source.organizeImports.biome": "explicit"
+  },
+  "[javascript]": {
+    "editor.defaultFormatter": "biomejs.biome"
+  },
+  "[javascriptreact]": {
+    "editor.defaultFormatter": "biomejs.biome"
+  },
+  "[json5]": {
+    "editor.defaultFormatter": "biomejs.biome"
+  },
+  "[json]": {
+    "editor.defaultFormatter": "biomejs.biome"
+  },
+  "[jsonc]": {
+    "editor.defaultFormatter": "biomejs.biome"
+  },
+  "[typescript]": {
+    "editor.defaultFormatter": "biomejs.biome"
+  },
+  "[typescriptreact]": {
+    "editor.defaultFormatter": "biomejs.biome"
   }
 }

CONTRIBUTING.md

@@ -10,6 +10,6 @@ The project is still under development, so it possible dependents on unstable Rs
 
 Current unstable versions are:
 
-| Package      | Version                                                 | Link                                                    |
-| ------------ | ------------------------------------------------------- | ------------------------------------------------------- |
-| @rspack/core | @rspack/core-canary@1.0.0-canary-26460a2-20240710092718 | [PR](https://github.com/web-infra-dev/rspack/pull/7102) |
+<!-- | Package      | Version                                                 | Link                                                      |
+| ------------ | ------------------------------------------------------- | --------------------------------------------------------- |
+| @rspack/core | @rspack/[email protected]0b368b6-20240704171208 | [PR](https://github.com/webpack/webpack/pull/11751/files) | -->

biome.json

@@ -28,11 +28,6 @@
       "quoteStyle": "single"
     }
   },
-  "json": {
-    "formatter": {
-      "enabled": false
-    }
-  },
   "linter": {
     "enabled": true,
     "ignore": ["./e2e/cases/**/*/src/*"],

e2e/README.md

@@ -28,7 +28,7 @@ Rslib will try to cover the common scenarios in the [integration test cases of M
 | jsx             | ⚪️     |                                                                                                                         |
 | metafile        | ⚪️     |                                                                                                                         |
 | minify          | ⚪️     |                                                                                                                         |
-| platform        | ⚪️     |                                                                                                                         |
+| platform        | 🟢     |                                                                                                                         |
 | redirect        | ⚪️     |                                                                                                                         |
 | resolve         | ⚪️     |                                                                                                                         |
 | shims           | ⚪️     |                                                                                                                         |
@@ -37,7 +37,7 @@ Rslib will try to cover the common scenarios in the [integration test cases of M
 | sourceMap       | ⚪️     |                                                                                                                         |
 | splitting       | ⚪️     |                                                                                                                         |
 | style           | ⚪️     |                                                                                                                         |
-| target          | ⚪️     |                                                                                                                         |
+| target          | 🟢     |                                                                                                                         |
 | transformImport | ⚪️     |                                                                                                                         |
 | transformLodash | ⚪️     |                                                                                                                         |
 | tsconfig        | ⚪️     |                                                                                                                         |

e2e/cases/alias/__snapshots__/index.test.ts.snap

@@ -1,6 +1,6 @@
 // Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
-exports[`alias should work 1`] = `
+exports[`source.alias 1`] = `
 "
 ;// CONCATENATED MODULE: ./e2e/cases/alias/src/a.ts
 const a = 'hello world';
@@ -13,7 +13,7 @@ export { a };
 "
 `;
 
-exports[`alias should work 2`] = `
+exports[`source.alias 2`] = `
 "(() => { // webpackBootstrap
 "use strict";
 var __webpack_exports__ = {};

e2e/cases/alias/index.test.ts

@@ -1,7 +1,7 @@
 import { expect, test } from 'vitest';
 import { buildAndGetEntryJsResults } from '#shared';
 
-test('alias should work', async () => {
+test('source.alias', async () => {
   const fixturePath = __dirname;
   const { contents } = await buildAndGetEntryJsResults(fixturePath);
 

e2e/cases/define/index.test.ts

@@ -1,7 +1,7 @@
 import { expect, test } from 'vitest';
 import { buildAndGetEntryJsResults } from '#shared';
 
-test('define should work', async () => {
+test('source.define', async () => {
   const fixturePath = __dirname;
   const { contents } = await buildAndGetEntryJsResults(fixturePath);
 

e2e/cases/externals/browser/index.test.ts

@@ -2,7 +2,7 @@ import { join } from 'node:path';
 import { expect, test } from 'vitest';
 import { buildAndGetEntryJsResults } from '#shared';
 
-test('should fail when platform is not "node"', async () => {
+test('should fail to build when `output.target` is not "node"', async () => {
   const fixturePath = join(__dirname);
   const build = buildAndGetEntryJsResults(fixturePath);
   await expect(build).rejects.toThrowError('Rspack build failed!');

e2e/cases/externals/node/index.test.ts

@@ -2,7 +2,7 @@ import { join } from 'node:path';
 import { expect, test } from 'vitest';
 import { buildAndGetEntryJsResults } from '#shared';
 
-test('auto externalize Node.js built-in modules when platform is "node"', async () => {
+test('auto externalize Node.js built-in modules when `output.target` is "node"', async () => {
   const fixturePath = join(__dirname);
   const { contents } = await buildAndGetEntryJsResults(fixturePath);
 

e2e/cases/syntax/config/__snapshots__/index.test.ts.snap

@@ -0,0 +1,48 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`should downgrade class private method by default 1`] = `
+"
+;// CONCATENATED MODULE: ./node_modules/.pnpm/@[email protected]/node_modules/@swc/helpers/esm/_class_private_method_get.js
+function _class_private_method_get(receiver, privateSet, fn) {
+    if (!privateSet.has(receiver)) throw new TypeError("attempted to get private field on non-instance");
+
+    return fn;
+}
+
+
+;// CONCATENATED MODULE: ./node_modules/.pnpm/@[email protected]/node_modules/@swc/helpers/esm/_check_private_redeclaration.js
+function _check_private_redeclaration(obj, privateCollection) {
+    if (privateCollection.has(obj)) {
+        throw new TypeError("Cannot initialize the same private elements twice on an object");
+    }
+}
+
+
+;// CONCATENATED MODULE: ./node_modules/.pnpm/@[email protected]/node_modules/@swc/helpers/esm/_class_private_method_init.js
+
+
+function _class_private_method_init(obj, privateSet) {
+    _check_private_redeclaration(obj, privateSet);
+    privateSet.add(obj);
+}
+
+
+;// CONCATENATED MODULE: ./e2e/cases/syntax/config/src/foo.ts
+
+
+var _bar = new WeakSet();
+class Foo {
+    constructor(){
+        _class_private_method_init(this, _bar);
+        _class_private_method_get(this, _bar, bar).call(this);
+    }
+}
+function bar() {}
+ /*#__PURE__*/ 
+
+;// CONCATENATED MODULE: ./e2e/cases/syntax/config/src/index.ts
+
+
+export { Foo };
+"
+`;

e2e/cases/syntax/config/index.test.ts

@@ -0,0 +1,12 @@
+import { expect, test } from 'vitest';
+import { buildAndGetEntryJsResults } from '#shared';
+
+test('should downgrade class private method by default', async () => {
+  const fixturePath = __dirname;
+  const { contents } = await buildAndGetEntryJsResults(fixturePath);
+
+  expect(contents.esm).toMatchSnapshot();
+  expect(contents.esm).not.toContain('#bar');
+
+  expect(contents.cjs).toContain('#bar');
+});

e2e/cases/syntax/config/rslib.config.ts

@@ -0,0 +1,23 @@
+import { join } from 'node:path';
+import { defineConfig } from '@rslib/core';
+import { generateBundleCjsConfig, generateBundleEsmConfig } from '#shared';
+
+export default defineConfig({
+  lib: [
+    generateBundleEsmConfig(__dirname, {
+      output: {
+        syntax: 'es2015',
+      },
+    }),
+    generateBundleCjsConfig(__dirname, {
+      output: {
+        syntax: ['node 20'],
+      },
+    }),
+  ],
+  source: {
+    entry: {
+      main: join(__dirname, 'src/index.ts'),
+    },
+  },
+});

e2e/cases/syntax/config/src/foo.ts

@@ -0,0 +1,9 @@
+class Foo {
+  constructor() {
+    this.#bar();
+  }
+
+  #bar() {}
+}
+
+export { Foo };

e2e/cases/syntax/config/src/index.ts

@@ -0,0 +1 @@
+export { Foo } from './foo';

e2e/cases/syntax/config/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "@rslib/tsconfig/base",
+  "compilerOptions": {
+    "baseUrl": "./",
+    "paths": {
+      "@src/*": ["./src/*"]
+    }
+  },
+  "include": ["src"]
+}

e2e/cases/syntax/default/__snapshots__/index.test.ts.snap

@@ -0,0 +1,19 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`should downgrade class private method by default 1`] = `
+"
+;// CONCATENATED MODULE: ./e2e/cases/syntax/default/src/foo.ts
+class Foo {
+    constructor(){
+        this.#bar();
+    }
+    #bar() {}
+}
+
+
+;// CONCATENATED MODULE: ./e2e/cases/syntax/default/src/index.ts
+
+
+export { Foo };
+"
+`;

e2e/cases/syntax/default/index.test.ts

@@ -0,0 +1,12 @@
+import { expect, test } from 'vitest';
+import { buildAndGetEntryJsResults } from '#shared';
+
+test('should downgrade class private method by default', async () => {
+  const fixturePath = __dirname;
+  const { contents } = await buildAndGetEntryJsResults(fixturePath);
+
+  expect(contents.esm).toMatchSnapshot();
+  expect(contents.esm).toContain('#bar');
+
+  expect(contents.cjs).toContain('#bar');
+});

e2e/cases/syntax/default/rslib.config.ts

@@ -0,0 +1,12 @@
+import { join } from 'node:path';
+import { defineConfig } from '@rslib/core';
+import { generateBundleCjsConfig, generateBundleEsmConfig } from '#shared';
+
+export default defineConfig({
+  lib: [generateBundleEsmConfig(__dirname), generateBundleCjsConfig(__dirname)],
+  source: {
+    entry: {
+      main: join(__dirname, 'src/index.ts'),
+    },
+  },
+});

e2e/cases/syntax/default/src/foo.ts

@@ -0,0 +1,9 @@
+class Foo {
+  constructor() {
+    this.#bar();
+  }
+
+  #bar() {}
+}
+
+export { Foo };

e2e/cases/syntax/default/src/index.ts

@@ -0,0 +1 @@
+export { Foo } from './foo';

e2e/cases/syntax/default/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "@rslib/tsconfig/base",
+  "compilerOptions": {
+    "baseUrl": "./",
+    "paths": {
+      "@src/*": ["./src/*"]
+    }
+  },
+  "include": ["src"]
+}

e2e/package.json

@@ -14,11 +14,11 @@
   },
   "devDependencies": {
     "@playwright/test": "1.43.1",
-    "@rsbuild/core": "1.0.0-alpha.3",
+    "@rsbuild/core": "1.0.0-alpha.9",
     "@rslib/core": "workspace:*",
     "@rslib/tsconfig": "workspace:*",
     "@types/fs-extra": "^11.0.4",
-    "@types/node": "18.x",
+    "@types/node": "~18.19.39",
     "@types/react": "^18.3.3",
     "fast-glob": "^3.3.2",
     "fs-extra": "^11.2.0"

package.json

@@ -6,7 +6,7 @@
     "build:examples": "cross-env NX_DAEMON=false nx run-many -t build --projects @examples/* --parallel=10",
     "check-dependency-version": "check-dependency-version-consistency .",
     "check-spell": "npx cspell",
-    "lint": "biome check . --diagnostic-level=warn && pnpm run check-spell",
+    "lint": "biome check . --diagnostic-level=warn &&  pnpm run check-spell",
     "prebundle": "nx run-many -t prebundle",
     "prepare": "pnpm run build && simple-git-hooks",
     "sort-package-json": "npx sort-package-json \"packages/*/package.json\"",
@@ -20,27 +20,24 @@
     "pre-commit": "npx nano-staged"
   },
   "nano-staged": {
-    "*.{md,mdx,json,css,less,scss}": "prettier --write",
-    "*.{js,jsx,ts,tsx,mjs,cjs}": [
-      "biome check --apply --formatter-enabled=false --linter-enabled=false",
-      "prettier --write"
-    ],
+    "*.{md,mdx,css,less,scss}": "prettier --write",
+    "*.{js,jsx,ts,tsx,mjs,cjs,json,jsonc,json5}": ["biome check --write"],
     "package.json": "pnpm run check-dependency-version"
   },
   "devDependencies": {
-    "@biomejs/biome": "^1.8.1",
-    "@modern-js/module-tools": "^2.53.0",
+    "@biomejs/biome": "^1.8.3",
+    "@modern-js/module-tools": "^2.55.0",
     "@types/fs-extra": "^11.0.4",
     "check-dependency-version-consistency": "^4.1.0",
     "cross-env": "^7.0.3",
     "cspell-ban-words": "^0.0.3",
     "fs-extra": "^11.2.0",
     "nano-staged": "^0.8.0",
-    "nx": "^19.3.0",
+    "nx": "^19.4.2",
     "prettier": "^3.3.2",
     "prettier-plugin-packagejson": "^2.5.0",
     "simple-git-hooks": "^2.11.1",
-    "typescript": "^5.4.5",
+    "typescript": "^5.5.3",
     "vitest": "^1.6.0"
   },
   "packageManager": "[email protected]",
@@ -50,7 +47,7 @@
   },
   "pnpm": {
     "overrides": {
-      "@rspack/core": "npm:@rspack/core-canary@1.0.0-canary-26460a2-20240710092718"
+      "@rspack/core": "1.0.0-alpha.3"
     }
   }
 }