✨ Add feature to only include polyfills required by your code

If `usage` option is set, the code is analyzed and only polyfills
for your code are included.

Signed-off-by: Ferdinand Thiessen <[email protected]>

Author: susnux

README.md

@@ -70,11 +70,8 @@ You can omit setting `targets` in this case browserslist is used (`package.json`
   exclude?: string | readonly string[] | readonly RegExp[],
   /** Overide browserslist targets */
   targets?: string | readonly string[] | Record<string, string | readonly string[]>
-  /** Add comment which modules are used within bundle */
-  summary?: {
-    size: boolean
-    modules: boolean
-  }
+  /** Only include polyfills for APIs used by your code (dependencies not included) */
+  usage?: boolean
 }
 ```
 

package.json

@@ -44,12 +44,14 @@
     "rollup": "^3.0"
   },
   "dependencies": {
+    "acorn": "^8.8.2",
     "browserslist": "^4.21.5",
-    "core-js-builder": "^3.29.1",
+    "core-js-compat": "^3.30.0",
+    "estree-toolkit": "^1.4.0",
     "magic-string": "^0.30.0"
   },
   "devDependencies": {
-    "@rollup/plugin-typescript": "^11.0.0",
+    "@rollup/plugin-typescript": "^11.1.0",
     "@types/jest": "^29.5.0",
     "jest": "^29.5.0",
     "prettier": "^2.8.6",