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vite-plugin-transform-micro-app

v0.0.1-alpha-9

Published

The micro-app subapplication was developed using vite

Downloads

4

Readme

vite-plugin-transform-micro-app

Enhance Vite builtin dynamic import

NPM version NPM Downloads awesome-vite

English | 简体中文

✅ Alias
✅ Bare module(node_modules)
✅ Compatible @rollup/plugin-dynamic-import-vars limitations
✅ Webpack-like behavior

Install

npm i vite-plugin-transform-micro-app -D

Usage

import dynamicImport from 'vite-plugin-transform-micro-app'

export default {
  plugins: [
    dynamicImport(/* options */)
  ]
}

API

dynamicImport([options])

export interface Options {
  filter?: (id: string) => false | void
  /**
   * ```
   * 1. `true` - Match all possibilities as much as possible, more like `webpack`
   * see https://webpack.js.org/guides/dependency-management/#require-with-expression
   * 
   * 2. `false` - It behaves more like `@rollup/plugin-dynamic-import-vars`
   * see https://github.com/rollup/plugins/tree/master/packages/dynamic-import-vars#how-it-works
   * 
   * default true
   * ```
   */
  loose?: boolean
  /**
   * If you want to exclude some files  
   * e.g `type.d.ts`, `interface.ts`
   */
  onFiles?: (files: string[], id: string) => typeof files | void
  /**
   * It will add `@vite-ignore`  
   * `import(/*@vite-ignore* / 'import-path')`
   */
  viteIgnore?: (rawImportee: string, id: string) => true | void
}

How and why?

We assume that the project structure is as follows

├─┬ src
│ ├─┬ views
│ │ ├─┬ foo
│ │ │ └── index.js
│ │ └── bar.js
│ └── router.js
└── vite.config.js
// vite.config.js
export default {
  resolve: {
    alias: {
      // "@" -> "/User/project-root/src/views"
      '@': path.join(__dirname, 'src/views'),
    },
  },
}

Dynamic import is not well supported in Vite, such as

  • Alias are not supported
// router.js
❌ import(`@/views/${variable}.js`)
  • Must be relative
// router.js
❌ import(`/User/project-root/src/views/${variable}.js`)
  • Must have extension
// router.js
❌ import(`./views/${variable}`)

We try to fix these problems

For the alias in import(), we can calculate the relative path according to importer

// router.js
✅ import(`./views/${variable}.js`)

If the import path has no suffix, we use glob to find the file according to UserConfig.resolve.extensions and supplement the suffix of the import path.
So we need to list all the possibilities

  1. transpire dynamic import variable, yout can see @rollup/plugin-dynamic-import-vars

./views/${variable} -> ./views/*

  1. generate runtime code