rollup.config.js

import babel from "@rollup/plugin-babel";
import nodeResolve from "@rollup/plugin-node-resolve";
import typescript from "@rollup/plugin-typescript";
import rollupPluginGas from "rollup-plugin-google-apps-script";
import commonjs from "@rollup/plugin-commonjs";

const extensions = [".ts", ".js"];

export default {
  input: "./src/index.ts",
  output: {
    dir: "dist",
    format: "esm",
    name: "gas-slack",
    sourcemap: true,
  },
  onwarn(warning, warn) {
    if (warning.code === "THIS_IS_UNDEFINED") return;
    warn(warning);
  },
  plugins: [
    typescript({
      declaration: true,
      declarationDir: "./dist",
    }),
    commonjs({
      transformMixedEsModules: true,
    }),
    babel({
      extensions,
      babelHelpers: "runtime",
    }),
    nodeResolve({
      extensions,
      mainFields: ["module", "main"],
    }),
    // rollupPluginGas(),
  ],
};