iwmlib/rollup.config.js

// rollup.config.js (building more than one bundle)
export default [
    {
        input: './lib/bundle.js',
        output: {
            file: './dist/iwmlib.js',
            format: 'iife',
            sourcemap: false
        },
        watch: {
            clearScreen: false
        }
    },
    {
        input: './lib/pixi/bundle.js',
        output: {
            file: './dist/iwmlib.pixi.js',
            format: 'iife',
            sourcemap: false
        },
        watch: {
            clearScreen: false
        }
    }
]