import babel from 'rollup-plugin-babel';
import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';
import { terser } from 'rollup-plugin-terser';
import json from "rollup-plugin-json";
// `npm run build` -> `production` is true
// `npm run dev` -> `production` is false
const production = !process.env.ROLLUP_WATCH;

export default {
    input: 'src/index.js',
    output: {
        file: 'dist/index.js',
        format: 'cjs', // immediately-invoked function expression — suitable for <script> tags
        sourcemap: true
    },
    plugins: [
        json(), // Add json support (sadly in rollup we have to do this explicity, despite the NodeJS algorithm supporitng this by defulat
        babel(), // babel (the reason we're doing all of this, babel transpiling)
        resolve({// node_modules (again we have to add support in rollup for something that is NodeJS default)
        }),
        production && terser() // minify, but only in production
    ],
    external: [
    
    ]
};