Image not builded when run snowpack build with bundle=true

[neviaumi]

Hi, i am beginner of snowpack and i want migrate my project from CRA to snowpack

So here is my snowpack config

export default {
  optimize: {
    bundle: true,
    loader: {
      ".png": 'file',
      ".gif": 'file'
    }
  },
  exclude: [
    '**/.github/**/*',
    '**/.git/**/*',
    '**/coverage/**/*',
    '**/scripts/**/*',
    '**/.husky/**/*',
    '**/.idea/**/*',
    '**/commitlint.config.js',
    '**/npmpackagejsonlint.config.js',
    '**/package.json',
    '**/package-lock.json',
    '**/tsconfig.json',
    '**/tsconfig.tsbuildinfo',
    '**/*.md',
    '**/*.yml',
  ],
  routes: [
    {
      match: 'routes',
      src: '.*',
      dest: '/index.html',
    },
  ],
  plugins: [
    ['snowpack-plugin-svgr', { /* see "Plugin Options" below */}],
    '@snowpack/plugin-dotenv'
  ],
  packageOptions: {
    polyfillNode: true,
    // https://github.com/snowpackjs/snowpack/issues/3682
    external: ['crypto', 'path', 'util', 'braces', 'debug', 'fs-extra', 'micromatch', 'ms', 'slash', 'source-map']
  },
  devOptions: {
    port: 3000
  },
  buildOptions: {
    jsxInject: 'import React from \'react\''
  },
};

It working with snowpack dev
It working with snowpack build with bundle=false
It not working with snowpack build with bundle=true

if i run snowpack build with bundle=true and open the result html.

It would complain Failed to load module script: Expected a JavaScript module script but the server responded with a MIME type of "text/html". Strict MIME type checking is enforced for module scripts per HTML spec.

And i find in complier source code it contain

As document said here, it should supported out of box?

I also attempt include below code according to esbuild document, but no luck.

 loader: {
      ".png": 'file',
      ".gif": 'file'
    }

Anyone can advise ?

[neviaumi]

https://github.com/snowpackjs/snowpack/blob/a3eadde76b5c74565cf78733989eb561e14c0add/snowpack/src/build/optimize.ts#L419

Turn out i feel like because of code here, it would recognise image as external dependence

[neviaumi]

After i attempt patch my local package, it working perfectly.

I will open PR to fix it. welcome to advise how to fix it.

I suggest let accept function extendConfig just like webpack plugin?