build(angular): migrate package bundling to Vite

Replace ng-packagr build artifacts/config with Vite library outputs and update package exports/scripts for ESM+CJS distribution.

Author: benjavicente

packages/angular-virtual/ng-package.json

@@ -20,38 +20,41 @@
     "virtual-core"
   ],
   "type": "module",
-  "module": "build/fesm2022/tanstack-angular-virtual.mjs",
-  "types": "build/index.d.ts",
+  "types": "dist/esm/index.d.ts",
+  "main": "dist/cjs/index.cjs",
+  "module": "dist/esm/index.js",
   "exports": {
     ".": {
-      "types": "./build/index.d.ts",
-      "esm2022": "./build/esm2022/tanstack-angular-virtual.mjs",
-      "esm": "./build/esm2022/tanstack-angular-virtual.mjs",
-      "default": "./build/fesm2022/tanstack-angular-virtual.mjs"
+      "import": {
+        "types": "./dist/esm/index.d.ts",
+        "default": "./dist/esm/index.js"
+      },
+      "require": {
+        "types": "./dist/cjs/index.d.cts",
+        "default": "./dist/cjs/index.cjs"
+      }
     },
-    "./package.json": {
-      "default": "./package.json"
-    }
+    "./package.json": "./package.json"
   },
   "engines": {
     "node": ">=12"
   },
   "files": [
-    "build"
+    "dist",
+    "src"
   ],
   "scripts": {
-    "clean": "premove ./build",
-    "test:types": "tsc --noEmit",
+    "clean": "premove ./dist ./build ./coverage",
     "test:eslint": "eslint ./src",
-    "build": "ng-packagr -p ng-package.json -c tsconfig.build.json"
+    "test:build": "publint --strict",
+    "test:types": "tsc",
+    "build": "vite build"
   },
   "dependencies": {
-    "@tanstack/virtual-core": "workspace:*",
-    "tslib": "^2.8.1"
+    "@tanstack/virtual-core": "workspace:*"
   },
   "devDependencies": {
     "@angular/core": "^19.0.0",
-    "ng-packagr": "^19.0.0",
     "typescript": "5.6.3"
   },
   "peerDependencies": {

packages/angular-virtual/package.json

@@ -1,11 +1,5 @@
 {
   "extends": "../../tsconfig.json",
-  "compilerOptions": {
-    "outDir": "./build/lib"
-  },
-  "angularCompilerOptions": {
-    "compilationMode": "partial"
-  },
-  "include": ["src", "eslint.config.js"],
+  "include": ["src", "eslint.config.js", "vite.config.ts"],
   "exclude": ["**/*.spec.ts"]
 }

packages/angular-virtual/tsconfig.build.json

@@ -0,0 +1,20 @@
+import { defineConfig, mergeConfig } from 'vitest/config'
+import { tanstackViteConfig } from '@tanstack/vite-config'
+import packageJson from './package.json'
+
+const config = defineConfig({
+  test: {
+    name: packageJson.name,
+    dir: './tests',
+    watch: false,
+    environment: 'jsdom',
+  },
+})
+
+export default mergeConfig(
+  config,
+  tanstackViteConfig({
+    entry: './src/index.ts',
+    srcDir: './src',
+  }),
+)