1. if most modern browser support dynamic import syntax, butterpack will only replace the import() path.
2. else, butterpack will manufacture import() to work

if you import a module with none extname. Butterpack should judge where it is.

import lodash from "lodash"; // butterpack will load it from node_modules directory.
import Toast form "@/component/toast" // butterpack will replace @ with path in alias config, and complete path extname

// butterpack.config.js
export default {
  alias: {
     "@": "src"
  },
  fileExts: [".ts", ".tsx"]
}

butterpack will intercept local server request, and proxy it to aimed remote server, just like node-http-proxy!

spilt butterpack to core and cli packages.

• move butterpack-core in this repository
• create a new repository for butterpack-cli
• create a new repository for butterpack-cli-settings, it's very convenient for users to use butterpack out of box
• create a new repository for butterpack-plugin-official
• create a new repository for butterpack-loader-official
• create a new repository for butterpack-awsome

butterpack will make require expressing compatible with import declaration

• optimise plugin api, export all plugin hooks

• add css plugin and sass plugin

• add json plugin

1. loaders could only transform other files to js codes. There are not file-loader, json-loader or url-loader like webpack loader
2. plugins could transform css, scss, img, fonts, json to server responsed stream.

if possiible, butterpack will automaic transform module(umd or amd) from npm into es module

butterpack will could resolve file path extname such as:

import { equal } from "utils"; // ext name is .ts
import icon from "icon"; // ext name is .png
import Count form "./Count" // ext name is .tsx

// butterpack.config.js
export default {
 fileExts: [".ts", ".tsx", ".png"]
}

default ext name is .js

butterpack will could transform no-js(no .js extname) file to js code.And you could custom any loaders,
such as vue-loader, svelte-loader. ts-loader could transform .ts, .tsx, .jsx to js code.