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vite-plugin-dynamic-import

v1.6.0

Published

Enhance Vite builtin dynamic import

Downloads

719,312

Readme

vite-plugin-dynamic-import

增强 Vite 内置的 dynamic import

NPM version NPM Downloads awesome-vite

English | 简体中文

✅ Alias
✅ Bare module(node_modules)
✅ 兼容 @rollup/plugin-dynamic-import-vars 限制
✅ 更像 Webpack

安装

npm i vite-plugin-dynamic-import -D

使用

import dynamicImport from 'vite-plugin-dynamic-import'

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

案例 👉 vite-plugin-dynamic-import/test

node_modules

dynamicImport({
  filter(id) {
    // 默认会排除 `node_modules`,所以必须显式的包含它
    // https://github.com/vite-plugin/vite-plugin-dynamic-import/blob/v1.3.0/src/index.ts#L133-L135
    if (id.includes('/node_modules/foo')) {
      return true
    }
  }
})

API

dynamicImport([options])

export interface Options {
  filter?: (id: string) => boolean | void
  /**
   * ```
   * 1. `true` - 尽量匹配所有可能场景, 功能更像 `webpack`
   * 链接 https://webpack.js.org/guides/dependency-management/#require-with-expression
   * 
   * 2. `false` - 功能更像rollup的 `@rollup/plugin-dynamic-import-vars`插件
   * 链接 https://github.com/rollup/plugins/tree/master/packages/dynamic-import-vars#how-it-works
   * 
   * default true
   * ```
   */
  loose?: boolean
  /**
   * 如果你想排除一些文件  
   * 举俩🌰 `type.d.ts`, `interface.ts`
   */
  onFiles?: (files: string[], id: string) => typeof files | void
  /**
   * 自定义 importee
   * 
   * e.g. - 在 importee 前面插入 `\/*@vite-ignore*\/` 绕过 Vite
   */
  onResolve?: (rawImportee: string, id: string) => typeof rawImportee | void
}

作此为甚?

假如有如下项目结构

├─┬ 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'),
    },
  },
}

动态导入在 Vite 中支持的不甚友好, 举几个 🌰

  • 用不了别名
// router.js
❌ import(`@/views/${variable}.js`)
  • 必须相对路径
// router.js
❌ import(`/User/project-root/src/views/${variable}.js`)
  • 必须含文件尾缀
// router.js
❌ import(`./views/${variable}`)

我们尝试与这个糟糕的世界怼一怼

要想在 import() 直接使用别名那肯定是不行哒;既要使用别名,还要根据别名计算相对路径

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

导入路径没有尾缀的情况, 我们需要使用 glob 根据 UserConfig.resolve.extensions 找到文件并且补全路径。
所以嘛,得列出所有的可能性才行的就是说

  1. 先把路径转换成 glob 形式,抄自 @rollup/plugin-dynamic-import-vars

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

  1. 然后生成运行时代码
- // import(`./views/${variable}`)
+ __variableDynamicImportRuntime(`./views/${variable}`)

+ function __variableDynamicImportRuntime(path) {
+   switch (path) {
+     case 'foo':
+     case 'foo/index':
+     case 'foo/index.js':
+       return import('./views/foo/index.js');
+ 
+     case 'bar':
+     case 'bar.js':
+       return import('./views/bar.js');
+ }