Rollup, Vue and Buble, unexpected token in scss file

Question

I am trying to compile SFC with rollup, using Vue and Buble, following the example suplied in the Vue official page. But I keep getting this error:

src/wrapper.js → dist/chat.min.js...
[!] (plugin buble) SyntaxError: Unexpected token (2:0)
src\components\Chat.vue?vue&type=style&index=0&lang.scss (2:0)
1 :
2 : .chat, .chat>*, .chat * {

This is my rollup.config.js:

import commonjs from '@rollup/plugin-commonjs'; // Convert CommonJS modules to ES6
import vue from 'rollup-plugin-vue'; // Handle .vue SFC files
import buble from '@rollup/plugin-buble'; // Transpile/polyfill with reasonable browser support
export default {
    input: 'src/wrapper.js', // Path relative to package.json
    output: {
        name: 'Chat',
        exports: 'named',
    },
    plugins: [
        commonjs(),
        vue({
            css: true, // Dynamically inject css as a <style> tag
            compileTemplate: true, // Explicitly convert template to render function
        }),
        buble(), // Transpile to ES5
    ],
};

And this is my wrapper.js:

  // Import vue component
  import component from "./components/Chat.vue";

  // Declare install function executed by Vue.use()
  export function install(Vue) {
    if (install.installed) return;
    install.installed = true;
    Vue.component("chat", component);
  }

  // Create module definition for Vue.use()
  const plugin = {
    install
  };

  // Auto-install when vue is found (eg. in browser via <script> tag)
  let GlobalVue = null;
  if (typeof window !== "undefined") {
    GlobalVue = window.Vue;
  } else if (typeof global !== "undefined") {
    GlobalVue = global.Vue;
  }
  if (GlobalVue) {
    GlobalVue.use(plugin);
  }

  // To allow use as module (npm/webpack/etc.) export component
  export default component;

I've tried removing buble from the plugins, but I end up with an error saying "Unexpected token (Note that you need plugins to import files that are not JavaScript)"

Answer 1

Try this:

$ npm install --save-dev rollup-plugin-scss

In rollup.config.js:

import scss from 'rollup-plugin-scss';      // handles '.css' and '.scss'

plugins: { ..., scss() }

I don't really know what's going on, here. The above worked for me (Vue.js 3 (beta) and rollup-plugin-vue 6.0.0-beta.6.