在汇总中如何让 --external 在命令行上直接指向要排除的模块？ （没有节点解析插件）

Question

The documents talk about using external in the context of the node resolve plugin, but I am not using that. I would like to exclude lit-html (which is native es6 modules) so that those imports remain in the bundle.

In my module I import them with import { html, render } from '../../node_modules/lit-html/lit-html.js' ; and it works great in the browser.

I have tried every permutation of path including relative path like rollup --format=esm --file=dist/bundle.js -- src/main.js --external 'node_modules/lit-html/lit-html.js' and just get [!] Error: Could not resolve entry (--external) .

It does not even say if the file is found, never mind what the problem is.

Answer 1

Seems your command is wrong, use -i to indicate the input file or try moving -- src/main.js to the end of the command without the dashes.

Regarding the external part, don't think it will work without using the exact id of the import but worth a try.

Using a config file:

module.exports = {
      input: 'src/main.js',
      external:[
        '../../node_modules/lit-html/lit-html.js'
      ],
      output: {
      format: 'esm',
      file: './dist/bundle.js',
      sourcemap: true
    }
  }