Background script without type:"module"

[AhmedKorim]

I'm trying to build a Chrome extension that uses wasm, the wasm file uses importScript which isn't supported with ESM,
is there a way to build the background script without ESM?

Trying to change the output manifest (removed type: "module" from the background script configuration) I got the error
Cannot use import statement outside a module

[AhmedKorim]

As a workaround, I ran rollup after vite finishes compilation to bundle the background script to commonjs and change remove the extension manifest type: "module"

//scripts/build.js
const { execSync } = require('child_process');
const { readFileSync, writeFileSync } = require('fs');
const { join } = require('path');

async function build() {
  // build with vite
  execSync('vite build', { stdio: 'inherit' });

  // Compile the background script to commonjs
  execSync('yarn rollup:build', { stdio: 'inherit' });
  // Change the manifest file to be classic script
  const manifestFilePath = join(process.cwd(), 'dist', 'manifest.json');
  const manifestFile = readFileSync(manifestFilePath).toString();
  const manifestdef = JSON.parse(manifestFile);
  delete manifestdef.background.type;
  writeFileSync(manifestFilePath, JSON.stringify(manifestdef,null,2));
  console.log('Updated the background script');
}

build().catch(console.error);

//rollup.config.mjs
// @ts-check

import resolve from '@rollup/plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';

/**
 * Creates an output options object for Rollup.js.
 * @param {import('rollup').OutputOptions} options
 * @returns {import('rollup').OutputOptions}
 */
function createOutputOptions(options) {
  return {
    name: '',
    exports: 'named',
    sourcemap: true,
    ...options,
  };
}

/**
 * @type {import('rollup').RollupOptions}
 */
const options = {
  input: './dist/service-worker-loader.js',
  output: [
    createOutputOptions({
      file: './dist/service-worker-loader.js',
      format: 'commonjs',
    }),
  ],
  plugins: [
    resolve(),
    commonjs(),
  ],
};

export default options;