[Treeshaking]: Parcel did not bundle core-js at all with explicit import

[axetroy]

🐛 bug report

When I want to polyfill with core-js for older browser like this

// polyfill.js
export * from "core-js/stable";
export * from "core-js/es";
export * from "core-js/web/url";
export * from "core-js/web/url-search-params";
export * from "whatwg-fetch";

console.log("Hello polyfill");

// app.js
import * as polyfills from './polyfill'

console.log('polyfills', polyfills)

🎛 Configuration (.babelrc, package.json, cli command)

.parcelrc

{
  "extends": [
    "@parcel/config-default",
    "parcel-config-vue2"
  ],
  "reporters": [
    "...",
    "parcel-reporter-static-files-copy"
  ]
}

package.json

{
  "name": "preview_renderer",
  "version": "1.0.0",
  "description": "preview renderer",
  "browserslist": "> 0.5%, last 10 versions, not dead, IE 10",
  "scripts": {
    "dev": "parcel --no-source-maps --no-cache --port 1234 entry/*.html",
    "build": "rimraf ./dist && parcel build --no-source-maps --no-cache --dist-dir dist entry/*.html",
    "format": "prettier **/*.js **/*.css **/*.html **/*.vue --write",
    "lint": "rome check **/*.js --apply-suggested"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@parcel/transformer-less": "2.8.2",
    "@parcel/transformer-sass": "2.8.2",
    "@parcel/transformer-vue": "2.8.2",
    "buffer": "^5.5.0",
    "parcel": "^2.8.2",
    "parcel-config-vue2": "^0.1.3",
    "parcel-reporter-static-files-copy": "^1.4.0",
    "parcel-transformer-vue2": ">= 0.1.3",
    "prettier": "^2.8.1",
    "rimraf": "^3.0.2",
    "rome": "^11.0.0",
    "vue-hot-reload-api": "^2.3.4"
  },
  "dependencies": {
    "classnames": "^2.3.2",
    "core-js": "^3.26.1",
    "howler": "^2.2.3",
    "id3-parser": "^2.0.0",
    "less": "^4.1.3",
    "normalize.css": "^8.0.1",
    "react": "^18.2.0",
    "react-dom": "^18.2.0",
    "react-use": "^17.4.0",
    "uint8-to-base64": "^0.2.0",
    "v-viewer": "^1.6.4",
    "video.js": "^7.20.3",
    "vue": "2.7.14",
    "whatwg-fetch": "^3.6.2"
  },
  "targets": {
    "frontend": {
      "publicUrl": "."
    }
  }
}

🤔 Expected Behavior

The polyfill will bundle into the javascript file

😯 Current Behavior

I search the VSCODE

and I can not found any code of this in output javascript files

export * from "core-js/stable";
export * from "core-js/es";
export * from "core-js/web/url";
export * from "core-js/web/url-search-params";
export * from "whatwg-fetch";

💁 Possible Solution

None

🔦 Context

💻 Code Sample

🌍 Your Environment

Software	Version(s)
Parcel	2.8.2
Node	v14.8.1
npm/Yarn	1.12.19
Operating System	Windows 10

[mischnic]

Maybe related: #8282

[axetroy]

bump